Are Oval Chainrings Beneficial? Pros and Cons - Hardtail Party
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- Опубликовано: 17 окт 2024
- This episode was a request form my patrons. What is an oval chaingring? Why do they exist? What are the pros and cons? Today we take a deep dive into oval chainrings. Did you learn something valuable? If so, show your appreciation and support this channel by becoming a patron today: / hardtailparty
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Finally someone explain ovals perfectly. Thank you!
Agreed, this is very well explained
Right?
Articles and videos on the Internet regarding oval chainrings
are a dime a dozen, yet somehow nobody has ever explained the biomechanics of how it works like you. Thank you.
Absolute black have extensive tested oval rings and have material on their web site.
That was the simplest, most straight forward way I have heard oval chain rings explained. I always thought they were a bit of a gimmick but the mechanics actually make sense now.
Thanks. Easy explanations are the hardest type to make.
My oval chain ring helps me a lot for technical climbing, because it smooths out the power and prevents the tire from loosening traction.
You are killing it with these in depth details about Geo and components like this 👍🏼 super helpful cus I'm looking at getting a new bike in the future.
Running a 34 oval on my hard tail. Probably one of the best upgrades I’ve done other than Rev Grips. With my 11-36 cassette I get around the hills of SoCal just fine.
MrJamesLuz love my revgrips!
Just got a 15$ oval chainring 34 tooth from JG bike on amazon this week only been riding a few days, love it so far. Put it on my 26er lol its now a 1x8 with a 9speed chain.
Same here,been using in my old school freeride bike to go everywhere😁
Dang, that might be the best explanation of Oval chain rings I have ever seen. There are fancier videos on RUclips that try to tackle this topic, but this guy nailed it with simplicity.
Information > fancy looking videos.
Im running a 32 tooth on my Commencal...Just tried it out and its pretty cool from what i observed. This is the best explanation i've seen though............ appreciate it!!!
Midwest MTB is your round chain ring a 30t ?
This is a bit of a repetition from the other comments, but, seriously, this made so much sense. Might get one of my own soon! Thanks!
I have been using an oval chainring for a year now, I find it much easier to pedal compared to round ones...I can feel the big difference between them. I highly recommend oval than round.
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A few more additions to the discussion:
1) most aftermarket oval chainrings won't work with Shimano 12 speed drivetrains, unless you swap the chain. I've heard that running a sram masterlink on a shimano chain will work, but I can't confirm. Absolute black has a separate oval chainring for shimano 12 speed chains. (HG+)
2) Sram derailleurs seem to be fine with the micro movements, but judging from the comments below, be careful with shimano. It seems a few people have toasted their shimano derailleurs from running an oval chainring. Absolute black shares my thoughts that rear suspension does more to the clutch than an oval chainring.
3) At super high cadence (high RPMs), circular rings feel better to me. Sitting and spinning feels smoother on a circular ring. On lower cadence, when you're really working and cranking up a tough section, the oval rings are my preference.
Agree with this. I have an oval ring on my XC bike and I’m more of a ‘grinder’ than a ‘spinner’ so it really works for me.’ Another well done video.
@@boneheadmck Ditto! (and i have one on my trail bike too!)
Defo, slow winches I'm so glad for my snaggletooth.
I never really paid attention to ovals. But with what you are saying, they would match my riding style. I am not a spinner and love to stand and use hipdrive to power up climbs.
does it affect wheelying ability?
Got an oval a couple weeks ago. I really enjoy the feeling. Your analogies of how it feels were spot on.
This is the best most concise explanation out of any website I've read or video I've watched
Started using oval back in 2010, never looked back.
Installed a 30T Absolute Black oval chainring on my Roscoe8. The next day we did a heap of steep climbs. What a difference! Been riding around with it for a few weeks now. Really happy with this upgrade. Cheers!
Glad it made a difference!
Dave - Good concise explanation of how an oval chainring works. About 5 years ago I went from a 2x10 setup to a 1x10 setup with a 30t Absolute Black oval chainring . Noticeable improvement on climbs as the oval chainring applies the torque more evenly to the rear end it improved traction on loose rocky climbs & made long grinds up easier for me too. That same oval chainring is on it's third hardtail now (with 11 speed cassette) while riding 3 - 4 times a week year round in all climates. The Absolute Black oval chainring is a quality must have product for me.
I must say, that was an excellent oval chain ring tutorial ! Great job, definitely informative
Been running an AB oval for 3 years now. It's traveled from bike to bike with me. I can tell the difference and I think I'll always use one now. It makes a great pair with my Catalyst Pedals.
Yep. I had an absolute black oval on a ghetto 1x10 I used to own. I found it made enough of a difference that I felt good about the upgrade. When I bought my new bike I waited until I wore out the round Eagle ring and ordered the Absolute Oval. It's worth the difference in cost and I agree that you should wait and wear out your round ring first.
The finest elucidation on the signed I've come across to date.
I switched to a 32t oval from a 30t round and honestly the oval feels no different at all. Put like 25 miles on it so far and feels the same and that’s a good bit of climbing. I might switch back to round just to see if I feel a difference.
I felt the biggest difference when I was in loose steep terrain. It smoothed out my pedal stroke and I was able to limit the times I lost traction.
Do you still use oval? Any updates to your opinion of it?
32t is different from 30t, try to use the same 30t oval chainring..
I'm a spinner, and I was weirded out for one ride by my oval chain ring. Five minutes into my second ride, I had stopped noticing any inconsistencies in the pedal stroke. I do love it in the tech. It took me a while to get used to it and trust it, but I'm much less likely to stall-out on a steep, sharp climb at the weak point of the pedal stroke, and that's always appreciated when you are 5.9 feet up a 6-foot rock slab.
I run an oval chain ring and I feel a significant difference. I don't have any knee pain anymore which I had with the normal round chainring. I believe that is because I can fulfill a smoother pedal stroke and cadence with the oval ring. I mostly notice it on steep climbs. There I can put the power down more constantly which results in more traction because of the more constant torque my wheel puts to the ground. My recommendation is to try one if you can because I think it's one of the upgrades that can better your riding experience and also your riding performance.
I have bikes with and without oval chainrings and while I agree they aren't 'necessary', I have found that it definitely makes my pedal stroke feel smoother. I prefer ovals because they feel better to me. Great video!
Got one on my and my gf's MTBs. Mindblowing stuff! ❤️
I rode with an oval a couple of years back and i did notice a difference tho i wasn't as educated then (as i am now) to have kept riding with one. Should've followed my instincts instead of bad advice coz i helped reduce my knee pain a whole lot. Great job 🍻 💯🔥
I put an oval Rotor ring on my single speed hardtail back in 2015 and haven’t gone back to a round chainring since then. Felt a little weird first half hour into my ride, but, soon forgot about it. Helps when climbing for sure.
Just because I want to be different not like everyone else. I running 2x10 xtr on my hardtail. and xt full suspension. To me I fine it better range.
Really good explanation. Great video, keep up the good work.
Mate this is some crazy information. If I install an oval chainring do I have to modify the chain and adjust the derailleuer?
You'll want to verify it isn't too tight at the tallest part. But most people won't have to change a thing.
great vid! you covered every question I had on the oval ring..your basic approach and demonstration really covered it completely.
excellent lesson Steve, after the pandemic is over I have a lot of parties in the mountains to attend, lol
Best argument for the oval chainrings I've encountered on youtube. I've switched, on my hardtail Scott Scale, from a 32 SRAM GX to a 34 Garbaruk. Completely different bike... a better one. Uphil it's a bit smoother and I don't feel like my ratios have decreased (although, arithmetically they did). While for nice flats, I can have better speed!
Really good explication dude, greetings from Chile!
Thank u for the greatest yet simplest definition of an oval chain ring!.
Good explanation i am a big heavy guy that likes to push hevier gears and i found that oval chainring really helpful with maintaining traction on climes. It is like a variable transmission where in my power stroke increases resistance and i dont spin out and then it makes it easier to spin through the flat part of the stroke.
I would definitely recommend giving it a try. They are pricey but you can ask to borrow one from a friend or see if your local bike shop would have a sample to try out before committing.
I love my Absolute Black oval ring. I honestly feel so much better spinning and climbing now.
I just switched to an oval chainring. More than anything, I've been feeling the climbs in my knees and I've heard they help reduce stress on the knees. Although I expected to feel some difference in the pedal stroke, it feels very natural. On short, steep climbs and switchbacks, it's much smoother and I was able to get out of the seat with much better traction. That hard/easy pedal stroke is gone. On longer climbs, seemed to have much more fuel in the tank at the top than with the round ring. Knees also feel much better morning after the ride. Sort of amazed at the difference.
I felt the difference the moment I started pedaling with an oval. When I got a new bike I immediately ordered an oval for it.
I’m upgrading my hardtail from a 2x10 SLX/Deore mix to full 11-speed XT with a Sunrace 11-46T cassette and 32T oval chainring. I’ll do a dropper later.
Best explained workings of oval I have found! Nice job! I use one and really like how on tech climbs I get endless traction from being able to spin smoothly.
Thanks for the video, after watching plenty of videos this is the one that sold me on the Oval chainring.
Absolute convert here, smooths out torque and lessens tire breakaway on steep climbs also reduces that saddle bounce you can get when pedaling hardtails! Maybe slightly harder on the legs (better workout?) because there's no let up!..
Currently on 30t round, just got a 32t oval just to try.
Got it for just $3 because of discounts!
Thank you, just the kind of demonstration i was looking for.
Next time I need to change a chainring I'll give an oval a try, sounds like an advantage for hill climbing.
I tried one on a collegues bike once and just sprinting down a road once i thought it was obvious how much they shortened the turnover phase and allowed me to push more. It's clear that they won't make any difference to the speed you can push on regular road for long periods of time but especially when you need as much power as you can physically get for a short uphill segment, i am sure they work very well indeed. The only problem is that my frame probably won't accept an oval ring in the same size as i run right now.
I went down 2 teeth and oval! Loving it - now using the full range of the block and have a super easy gear for the steep ups
This is my biggest issue l am having. On our hardest climbs I pretty much now only go down to 1st gear (1by12 (30,10/50) for the worst part of the hardest climb. I want to try and run the shifter in say 4th,5th,6th rather than 1st,2nd,3rd so was going to go to 28t oval. Most saying say same or go bigger (32t). What advice would the majority give? Si.
Great video Steve 🤟. I'm so used to running AB ovals that when I get on a bike with a round ring, it feels weird and I feel the "push, push" stroke instead of the smoother more consistent oval stroke. Definitely notice the difference. 34t oval on the Enduro bike and 30t oval on the fatty, both with 12-speed, 50t cassettes
Another great vid! I just switched to oval on my hardtail and full-sup and I notice a difference for sure. Keep up the good work.
The other week I threw on a 28 tooth oval chain ring replacing my 28 tooth round chain ring to see if the hype was real. Believe the hype. It definitely makes the crank rotation feels smoother (no more smash and pause). I found myself getting over obstacles that I’ve never been able to clear.
I am always looking to improve pedal efficiency . My bike is an extra large frame at 20.5 . I am in between on height between large and extra large on my bike which is a budget hardatil so I feel a bit stretched out riding so I moved my saddle forward on my budget dropper . My pedal efficiency climbing was a noticeable improvement and hard to believe just getting my legs into a better position for pedaling . It also affected the seat angle pushing the nose of the saddle down which is helpful for climbing . Of course that kind of pushes you forward to the bars pedaling on the flats and no affect going downhill because I am out of the saddle . I do like the concept of the oval ring and if I do want to upgrade I want to try out an oval ring and a higher engagement hub . I will stay with flat pedals . Very informative Steve . I think the key is not easier but more efficient for me and what I am looking for . you would think they are one in the same but for me they are different
Informative, thank you! I just saw the Ad on Facebook so I had to check it out. I will give it a miss for now. :)
Just ridden first oval chainring for three days straight and so far good. No noticeable change in the feeling during pedalling on the fire road, which I think is a good thing. But once I hit rocky climbs I can hammer those pedals, while having smooth feeling in the legs and far less slipping on the rear tyre. I think I'm going to keep it for a while, probably forever :) Not a game changer but definitely HUGELY nice thing to have.
Great explanation. I have a 30t on my bike and ordered the 30t oval (which was recommended from the company). It doesn’t fit. Just makes contact with the chain stay. Is there a way I can just add a small spacer on the drive side to clear? I have a DUB bottom bracket
on my 2018/7 hardtail, I have a 3X8 system with a 48t max chainring that I use on trails (bc the chain gets stuck between chainrings when shift the front derailleur), After this video I am thinking about going 1X 12 using a a $20 38t oval chainring with a $100 9-50t 12speed cassete. I did some gearing calculations and it looks like the 1X12 setup will obviously give me a better climbing while better for speeds up to 50km/h at 90rpm! I really hope this will allow me to keep up with my dad on his E-bike.
I love oval chain rings. I’ve got one bad knee (from an old skiing injury) and the oval seems to allow me to maximize force on the strong part of my stroke without irritating my knee as much. I’ve used one for about ten years without any problem.
I commuted on a biopace ringset for a while. I don't know how much it could have helped me but I liked it.
Years ago I had a Bridgestone Rb-1 road bike that had oval chain rings . It was a nice used race bike that the lbs in Evanston,Il raced with there team . It was a nice bike that I kept for years . Upgraded the wheels and drivetrain.
These ovals work differently from the old " Biopace" Shimano chain rings. The Shimano places the smallest portion of the oval during the power portion of the pedal stroke. They feel really strange and hurt my knees in the beginning but I've adapted my pedaling to avoid using the same amount of force as I did with the regular round chain rings. Its more about spinning than power or force with the "Biopace" . There is definitely a mechanical advantage with them. I am scrambling around the hilly roads around here noticeably better and easier. I'm curious to try something with the oval pattern that you have so well described for a comparison.
So when going to an oval you’re supposed to go up 2 teeth? I’ve been thinking about going down 2. So a oval with the same would be like going down?
For me and my preferences, I go up 2 teeth and it feels like the same effort. I definitely wouldn't go down, as that would make everything even easier.
My two cents after trying a bunch of different combinations of round and oval of different tooth numbers. If you have found a round that works well for you then match the oval in teeth. You could go up two but after going up two I found it just a bit to much. I was a 32 round now 32 oval really like it the 34 was just to much for the big climbs here in the northeast.
Am using 34tt ovalchainring and a 36tt Shimano Cogs because zee rd has shortcages, still adjusting on climbs. My take is they're not for everybody, but there's no harm on trying new parts, set up, etc.
Yep, switched over to the oval 30T on my trail bike. Absolutely blown away but at the same time it doesn’t feel much different. I guess the stroke feels a lot smoother but not radically different enough to make me dislike the feel.
*I have a 7 speed Dahon folding bike with 20" wheels and I run a 75T Driveline chainring to compensate for the small 20" wheels, which works great and provides great top end speed with an 11T 7th gear cog. I'd like to try oval but I don't believe anyone makes one with enough teeth to match the top speed of my 75T chainring. Do you think an application like mine would benefit from an oval ring?*
They remind me of the old Bio-pace chainrings of the early 90's. My first Mtn bike, a Schwinn High Sierra, had them.
You can go to Absolute Black website and see videos about Biopace and the new generation oval rings. It's quite interesting.
Yup, I tried to run a 32t AB oval on my Trek Fuel (uses 32t round) and it rubbed. Swapped to a 30t oval and it’s still really close but fits. I hope 30t oval isn’t too small. I try it when it stops raining😁
I got a cheap 32T oval off of amazon and I dig it. As far as the basic feel is concerned, I didn't notice a massive difference while pedalling. I'm a beginner biker though. One other thing that I think it's worth mentioning is the angle of the chain to the highest/lowest gears.
Excellent Oval description and review Steve, you took the bike nerd out of it and got down to the practical application! (i have run ovals on all my bikes now for two yrs and i just like that 30-34 ratio on climbing, not sure i notice much diff anywhere else)
I ordered a 30t AbsoluteBlack to replace my 30t SRAM chainring on my hardtail, now waiting for it. Sometimes when there are many climbs, I tend to get sore knees after a ride, so my hopes are high in smoother pedalling!
This might be more of a concern for Shimano than SRAM (does SRAM put an actual one-way clutch in their derailleurs?), but I wore out a new XT derailleur in less than 3 months while using an oval Wolftooth chainring. The clutch simply seized up, so that the derailleur wouldn't spring back when shifting to a smaller cog (leaving slack in the chain) if the clutch was engaged at all. No amount of adjustment or lubing helped; the axle at the main pivot was discolored and rough on inspection.
There wasn't a noticeable difference after going back to a round chainring. Kudos to Shimano for replacing the derailleur on warranty; there is a reason why there are no OEM oval chainrings!
Someone in the comments below said SRAM has no issues with people running ovals. You're not the first ive heard with shimano issues. That's too bad.
Cool! Now I get it. I have two old hard tail Treks. 70 bucks? Not too much an issue. I'm used to buying spendy motor cycle parts.
Hi...I'm doing a bike up (slowly)...My Nkp Scout frame 27.5 takes a 32t Boost chainring...I will also consider a 34t oval also. You don't know until you try for yourself! Thanks.
One of the best upgrades I've made going oval, I've been running it for two years now and would not go back to standard!
I finally tried an oval. Your explanation of how it "works" is far better than anything I've ever heard. I thought if it helped me, even slightly at climbing, it would just be a bonus. I'm a tall guy at 6'8" and go 245lbs so I have a lot of gravity going against me.
I'm definitely not slow and can hang with most guys in my area, but I do get dropped on longer climbs by guys that weigh 80-100lbs less than me.
Anyway, I tested it out the past 2 weekends and was slower than ever. I chalked it up to riding in snow and temps in the teens. But I always felt like I was in the wrong gear and really struggling to maintain speed. On Sunday I ran one 8.5 mile lap on the oval. Then swapped back to my round chainring and ran the same 8.5 mile lap. Felt so much smoother on the round ring and was 9 minutes faster! My oval experiment is over. Haha. Now I need to sell the chainring.
Very interesting. What length cranks are you running?
175, anything shorter feels really odd to me.
@@sixate good call l. Very interesting experiment, thanks for posting your results.
fast forward a year, and Steve recommends shorter cranks.. i got the 5DEV 155's on my enduro, w/ a 28T oval. it has no problem in climbs. even tho its primarily my jump/park bike, i still have to climb areas that are not lift assist.
my trail bike is running 160's w/ a 30T oval. crank length, progression, ring size are all equations now.
Question, my wife and I race road bikes but we cross train with mountain bikes. Never have we used oval chain rings before. We want to see the difference without compromising our leg strength. Will switching to oval compromise strength in legs? Thank you
I don't know, you'd have to talk to a coach/trainer for that.
Excellent explanation
Love my MRP oval. Also "narrow wide" chainrings should be mentioned.
Best video I’ve seen on this topic. Thanks!
Dude, great breakdown as to what is actaully happening when you pedal oval chainrings. I had maybe an idea of what was going on. I actually did have what I think shimano called their "Biopace" oval chainring on one of my very first POS mtbs. I can't even remember back that far what they were like hahaha
Great, well described tutorial. I had tried a couple of older brands of Oval Chainrings in the ‘90s and they were the rage for a while. My recollection (often poor) was that they caused a lot of knee issues for Cross Country guys and then everyone summarily dumped them? Do you remember? That has been the only thing holding me back?
Modern ovals have a totally different ratio, people compare them to biopace but they are very different in their ovality and angles.
Amazing explanation and examples! Great thanx!
I haven’t ridden in like 20 years till a ride last year on my 20 year old stump jumper XC and it was brutal. Been wanting to get back into it though so will only get a new bike if I can get back into it to justify the costs.
Found your channel when researching hard tails and love your stuff man. Wish me luck on getting back into it. I live in San Diego so kind of hilly and rocky but not too bad, will probably look at a trail bike when that time comes. Would also be great to try the oval ring.
Good luck. Despite the bike shortage, it's an amazing time to get back into mtb
Hey Steve. Would you say oval rings make wheelies easier, harder, or make no difference?
Not a significant difference to me. They won't be the key that make wheelies click for people.
@@hardtailparty In other words: losing my fat gut would probably make a much bigger difference. 😂
Hey, I resemble that comment. ;)
Wheelies are mostly technique. Ryan leech has a fantastic wheelie course (link in description)
immediate difference felt when i switched from round to AB oval. our chunky rocky rooty northeast trails are much easier to keep pedaling through. i get a much better last pedal stroke for going over logs and step up type things. only time i feel it being slightly weird is in the parking lot or on roads between trails.
I've definitely been thinking of getting one. I know there are quite a few people out there like you that prefer them. I wish they just included them from the factory, but it's not too costly of an upgrade at least.
they're pretty polarizing. People either love them or hate them. And so many bikes are bought based off looks. I think speccing them on factory builds would get too many comments about how weird they look, and people would be less likely to buy the bike. Sounds dumb to those of us who don't care about that stuff, but some people care about looks above all else with their bikes.
@@hardtailparty I hear ya.
I ride handcycles and these make a big difference. We are different where both out crank arms are parallel to eachother rather than the 180 degree difference with an able bodied bike. Using your arms pedaling is a lot more difficult as the muscle groups are smaller.
All that said, any advantage is needed.
Awesome! What a cool insight.
Hello, what if my rear derailleur doesn't have a clutch? Should I just stick with round? Will it affect the long term life of my rear derailleur?
Would you say that changing from a round 32t to an oval 32t would effectively feel like downsizing to a 30t (especially on the climbs), even though both have 32 teeth?
I borrow a friend bike and I don't know it has oval chain ring and i feels so good at climbing.
After i test it out he told me it got oval ring. I'm excited to try it out.
Great video man! I was really wondering if they would be worth it in the future. If I do get one I will most likely wait until the price goes down for sure.
Oval chain rings are 20-30 dollars more expensive than normal chain rings, price won't go lower than that.
Ran shimano biopace oval on my 80s and 90s bikes back then, and loved it. Could never understand why they went away from them.
Bio pace was actually 90* out of phase with these. So they got easier at the power position and harder at the weaker spot
@@hardtailparty sure made it easier for me all the way around
Thanks for the educational vid. I've got a 34 round and there's a 30 oval in my mail box . Cassette is 11-46 if I would have seen this video before purchasing, I would have gone with a 32. That bike was perfect for Florida trails, but on longer steep climbs in mountainous regions, it needed a smaller front, or a 50 tooth rear
Just ran across this and you just explained something that confused me for years. In 2mins 35secs. Thank you. Now can you do the main principles of thermal dynamics?😇
I just watched your video on shorter cranks. Thought it was very informative. What are your thoughts on running shorter cranks + oval chainring? Do you think having shorter cranks negates the benefit of the power section of the oval chainring because there’s less leverage vs longer cranks that can take advantage of the power section?
I tried an oval for a while and it felt exactly like a round one to me. I didn’t notice any improvements in any situation. When I sold the bike I left the oval on it. I don’t think I’d try another one.
Great explanation! I really appreciate you sharing your expertise. I've run a Wolf Tooth oval on my bikes and really like it.
Perfect video. I just broke my chainring and am looking at a new oval one.
That the bad thing about 1 X's. No back-up gear.
Great explanation
I swapped my round to an oval , like for like teeth .It defiantly helps with the climbs to get a rhythm going.Example was my riding mate is always quicker to the top of the hill ,he goes off quick ,stops, goes again stops until he hits the top, always beats me ,but the last few times i can go at my slow pace and catch him up .it is the tortoise and the hare come to life.This was his analogy also lol