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I had a 2023 Rocky Mtn Altitude 4.0 . It required a lot more rider energy than a Brose, Bosch or Yamaha to get the most out of it. The biggest drawback was the battery charging system overcharged the battery and the battery exploded and burned everything in my garage to ashes. Rocky Mountain seemed to want to help, but in the end they just wanted to get the burned bike out of my possession and pretend it never happened. They hired a bunch of lawyers to threaten me from telling this true event. I feel a duty to warn potential buyers of the very real danger of keeping a Rocky Mountain bike indoors. The damage to my home and property is over 350k, and I am lucky to be alive. Don't take the risk with a Rocky Mountain E-MTB. It is not worth it.

Love the sticker decal! Where did you get them?

So what was the final verdict on climbing after a little more use? I have demoed so many bikes and I am a firm, firm believer that 29" wheels do not work on the back of small frame bikes. There is just not enough butt-to-tire clearance even when just sitting to lower the seat for descending. I really want a shorter travel bike but cannot find one without a 29" rear wheel. We love our YT bikes and I would love to get an Izzo.

Holy cow he was absolutely ripping in this video. Just picked up an Izzo Core 4 on mega sale for $3k from YT. On Transition Spire and wanted a full sus that pedals for mellower singletrack but wanted to make sure I could still send it. This video proves that won't be an issue lol. It almost looks like the izzo was TOO fast and light for a lot of the sections. Going to take some getting used to coming off a big bike. Also looks like the thing wants to leap into the air. I am so excited. Keep shredding!

Dude, did the Capra up Right! Looks Sharp & AXS upgrade is cool!

haha uphill very hard

what's size Izzy?

hearsay. no details, wrong test anyway

it's a pity the RM doesn't have the reviews and comparisons to Bosch , brose , shimano , etc. i've only heard positive reports from that bike . i live in germany and ride a NOX (Austrian bike) that had the newer Sachs motor , made in germany . it has 112 NM. i also have a bosch cx motor on a Cube and on steep hills the Sachs destroys the bosch even in low cadence . i don't know how fast i could go up hills because i can reach the pre set speed of 25 kph so easily and then get no assist .

I took the rm a50 and I'm happy. The only thing I relied on and heard from the web was the 108nm motor being the most powerful. I had a trek rail 5 625w with 85 nm bosch and with the turbo it was more explosive and copious than the 4.0 dyname. I did a "recovery" with a friend of mine who has the bosch in turbo and I in ludicrous and we were even though my leg was more trained than his. I calibrate the bike every outgoing and boost in +2 at any place, maybe motor is not ok?

Sensational

mine comes on tuesday - can't wait

Wicked test dudes ✌🏼

Nice Thank you from Israel 🇮🇱

Sounds to me EP8 is a better motor. You just don't know how to control it.

Interesting and fun review thanks. I ride Trek Rail with Bosch which comes on real fast. I bought it over a Levo because everyone raved about its power but the Turbo mode is useless in the technical stuff though emtb assist is better. I would love to try this thing out. Also I wonder how the Instinct compares to the Altitude. I don't need that big travel of an Enduro bike and like something more agile in turns.

Shimano seems to be falling behind every other motor out there. I really don't know why so many manufacturers are still using it, other than maybe availability?

@CaliforniaMTB Thank you so much for this review! I've been going back and forth in my mind for a while now between the IZZO and the JEFFSY. And when you said that the IZZO isn't significantly better on climbs but the JEFFSY is significantly better on the downhills, that's all I needed. Mind made up, JEFFSY it is. Thanks! Now I just have to choose the size, as I'm 183 cm (and 85 kg) right between L and XL. I'm coming from a Cube Stereo 120 (my first bike), size L, so even if I go with the JEFFSY L, it will still be a bit longer than I'm used to. I do have a slightly longer torso compared to my legs and I have rather long monkey arms, so I'm hoping longer reach will help me feel less boxed in. Any thoughts on sizing would be much appreciated! But no hurry, a month ago I destroyed my knee riding and just had my ACL reconstructed. So in reality, I'll probably end up on the 2023 model. Also, one last question, do you think the JEFFSY would be good on a trans-alp ride? Thanks a ton!

Hi - very interesting video as I am hoping to purchase a base Decoy (as that is my budget) but I have demo ridden the Pro Race. I wanted to ask you what kind of light set-up you guys have on your bikes and would you recommend them? Also, can you tell me where you got the decals that are on your wife’s bike/the bike that your son is riding?

what about the EP8 ?

nice review

I would like to see the uphill crawl test with the seat hight properly adjusted and both in the same gear. I noted discrepancies.

Would you feel better on size L? I am 5’10” and 95 kg and wondering what size to choose

That is funny he passed me at the :38 sec mark:/

new Dyname motor is quieter and new Altitude powerplay a big step forward in overall performance.

Great review! After reading the comments and watching yours and others videos I’m still left wondering which YT model I should go with. I understand a lot of this comes down to personal preference but I want to come to an educated decision before dropping close to $6K on a bike. Can you assist in that? You seem to have quite the experience with different YT models. 5’9” 185lbs. Currently live in VA riding on rooty, rocking single track/XC focused trails. After a couple years will go back to SoCal where I’m from to ride similar terrain in many of your videos. I don’t race nor have the desire to enter XC races, but desire to keep up with XC group rides on the climbs but want hit rowdy stuff on the descents (not park). Also desire to ride CO style back country terrain couple times a year. The 2022 Jeffsy Core 4 red color looks sick, the 2022 Izzo Core 4 black looks ok (not a fav) but don’t want to decide solely on color. Most rides consist of 10-15, but want to do the occasional 30+ miles of mixed type of trails. Any suggestions are appreciated. Can’t afford to have multiple platforms so looking for an all rounder. For reference I currently ride a Trek Marlin hard tail and have never risen a FS but know that an FS is for sure my next ride.

Rocky Mountain just announced their new 2022 Powerplays. Same power, lighter motor, and a cool display.

where is the unboxing video ????

good video bro

Hi, would you say that new 2021 Jeffsy feels smaller than other similar bikes? I am waiting for stock on Jeffsy Core 2 and seem to be confused about sizing. I am 182cm (5.97) and according to YT size chart I should chose Large (173-183cm) but could also size up to XL (183-193cm). Some owners are saying that I should size up, however others say I should definitely chose Large. What would you suggest after riding the bike (I think it is same dimensions as 2021 Core 2). Thanks

Good vid

2 seasons, 5000km of hard single track and jumping in Nelson, BC. The Rocky is an absolute beast. Riding with friends who own other platforms, it’s clear, Rocky is the champ.

May I ask what trail this is or where to find it? I’d love to ride it sometime.

Rocky climbs like a gecko on crack

This looks like the terrain the izzo was made for

What Size frame on your Son Riding ?thanks

We just. Came from Utah. Great place to ride. You will love your née Rocky Mountain.

This was awesome. I have raced MX and desert on motorcycles for most of my adult life and have also loved mountain biking, recently my hips have become an issue for me while riding my MTB. Then I tried an ebike... Sold my KTM 300XC and am currently in search of a new ebike. I appreciated your review/test/comparison of the Rocky Mountain Powerplay, I think I am going to go with one of those, they seem well spec'd and I like the way the engine seems to work - plus a 672wh battery is icing on the cake. I used to ride moto at that track when I lived in San Diego, we are in Utah now - MTB heaven.

What a crazy world we live in when racing your mountain bike up-hill is the fun new thing to do.

Does this have the ep8 or e8000? Nice race!

The new capra is out and I put a deposit on a small. I'm 5'5.5-5'6. I think the geo has changed a bit for this model. Would you think at my height I should be getting a medium instead? My inseam is 31 inches. Thanks in advance.

This is the trail that convinced me to buy a MTB. Decided to rent a Hightower, COMPLETELY out of shape. Took me 2 hrs to get up, ran out of water by the time I was up. Cramped 3 times on the way down and busted a kneecap, and lost some knuckles. I knew I was in love. My ex-pro buddy didn't even help, just stated I needed some testosterone shots to make me a man again.

🤘🏻🤘🏻🤘🏻

The precision of the power assist for the RMPP is due to the torque sensor that holds a small cog along the chain. Even a little pressure on the chain is noticed by the torque sensor where as the other ebike motors require the crack to actually move a specific distance before the assist kicks in.

Well the RM costs twice as much. I'd be pissed if it wasn't better.

Regarding chain sound. Anyone rideing a Powerplay should give a good wax emulsion based chain lube a try. Really makes a difference since the motor itself is completely quiet compared to both Brose and Shimanos high pitch sound. I've been using Squirt Lube for the last year, and are now tryin the new Jucelube Wax. Keeps the grinding sound away and also keeps the chain clean. I keep a small bottle of wet lube in my backpack but have so far not used it on my even longer wet riders. But good to have when others have forgotten to lube after every ride/ bike wash.

To be honest, in my opinion such races are totally nonsense because there is no seriously difficult parts in the course. It's stupid gravel road "rush" with no technically difficult parts, no a lot of very steep, rough rocky and rooted parts with uphill steps, narrow turns and so on, where the rider has to balance the power of the bike, keep the front down and do his best to stay fast. If there are not mostly technical sections, everyone can switch on the power and ride. But that's not your fault 👍 Don't understand me wrong, it's nice but not a big challenge in my opinion 🤔 PS: we both discussed the video with the Rocky/Shimano compare...

Well, I ride the Altitude PP since end of 2017 and did expect that. Maybe you have the opportunity to do such a simple compartment with a Brose (Specialized) and Bosch eBike too?🤔

Can you recommend a good ebike for around $1,200, that's in stock?