BENT Derailleur Hanger Fix: Gravel Bike, Road Bike, MTB, Any Bike
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- Опубликовано: 24 июл 2022
- Putting it mildly, a bent / misaligned derailleur hanger is among the leading causes of poor shifting with one's rear derailleur. A visual inspection may indicate the derailleur to be in good working order, but without the hanger being straight, shifting will be compromised no matter how much tinkering you do. This issue can be a problem for all drivetrains with rear derailleurs no matter the type of derailleur, or type of bicycle. In the experience of JOM, this issue has even plagued review bicycles, brand new out of the box (barring shipping damage).
There are several derailleur hanger alignment tools available to perform the realignment, but we prefer the best and last you'll ever need, the Abbey Bike Tools HAG (Hanger Alignment Gauge).
Here's a blurb about the tool that we purchased from Abbey Bike Tools:
"The derailleur hanger is the foundation for the modern drive train to work properly. With modern bikes getting as many as 13 cogs in the space that we use to put 8 it's never been more important to make sure the hanger is perfectly straight. Sadly many of the current tools just aren't capable of achieving this kind of precision."
"We went through extra steps to make this tool half precision measuring instrument and half pry bar."
Other Features:
* Tolerances as tight as a quarter of a thousandth of an inch (.0063mm) in some critical dimensions of this tool.
* Ability to lock in the feeler so you don't have to second guess your measurement after bumping it on the tire.
* Top half of tool will rotate out of the way of fender stays and frame tubes.
Learn more about Abbey Bike Tools here - www.abbeybiketools.com, and be sure to check out our factory tour video of Abbey Bike Tools in the Links of Interest below!
Links of Interest:
Abbey Bike Tools - abbeybiketools.com
Abbey Bike Tools Factory Tour - www.gravelcyclist.com/videos/...
Oregon Trail Gravel Grinder Stage 1 - www.gravelcyclist.com/videos/...
Oregon Trail Gravel Grinder Stage 2 - www.gravelcyclist.com/videos/...
Oregon Trail Gravel Grinder Stage 3 - www.gravelcyclist.com/videos/...
Oregon Trail Gravel Grinder Stage 4 - www.gravelcyclist.com/videos/...
Oregon Trail Gravel Grinder Stage 5 - www.gravelcyclist.com/videos/...
Gravel Cyclist's Route Library - www.gravelcyclist.com/gravel-...
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No cost to you, but every purchase made helps keep Gravel Cyclist up and running! - www.amazon.com/?&_encoding=UT...
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Great explanation. It would probably be a good idea to mention that the hanger is usually a replaceable part and it can break when bending straight. Actually, some frame manufacturers say to never straighten it, just replace it to keep themselves out of liability questions.
Depends on the bike and hanger, but I find they often need aligning even when new. Very slight adjustments should not compromise the hanger - many of them are just forged/stamped or cast so not exactly precision or fragile. Even a billet machined hanger could be out of alignment with the axle if the rear triangle and dropout aren't also 100% perfect - maybe close enough that it doesn't matter, but I always check rather than trust.
I recently took a new $10k bike for a test ride; straight out the back door of the shop the rear derailleur shifted into the spokes (eTap). Never had that happen on a bike that I assembled.
Nice video thanks! Other demo videos I've seen have the alignment checked by rotating the wheel at the same time as the alignment tool, checking it with the valve at 6 o'clock, then 12 o'clock, to take into account any out-of-true in the wheel. Also they showing checking at 3 o'clock and 9 o'clock (side-to-side alignment, in addition to top-and-bottom alignment). I looked like you put a lot of torque into the tool when straightening the hanger - I've done that and snapped the hanger (twice)... a little force goes a long way in the process in my experience.
Thanks for the feedback, Matt. Thankfully, this wheel is very true, so I shortcut. I probably should have mentioned that. This is the third time this hanger has been "adjusted", replacements are inbound.
Nice! Thanks for that video. We have one of those tools in our DIY bike workshop but I never bothered to figure out how this actually works so that's another helpful skill in the bag 🙂
Fabulous tool! Got one for myself!
Very good. Appreciated.
Thanks for this useful video. I love how you say "NOOOICE" :)
I always enjoy your videos and learn a ton each time I watch. You’ve answered my questions and have helped in the past and now I have a bike choice scenario with which I would appreciate your insight.
We just moved to Southwest Florida where the riding will be different than what I’m used to with more sandy areas, less hills, etc. I do not ride roads at all and am hoping to find some nice gravel rides here.
I do ride some sidewalk areas to the beach, into town, etc., as well as some paved multi use trails here in the area.
I currently own a Giant AR 1 (All Road) with Shimano 105, 11-34 rear and 50-34 front derailleurs and I have the tires maxed out at 700x38.
My debate is whether to keep this bike and replace the front derailleur with a 48-32 “OR” sell this bike outright and buy a more gravel oriented bike.
Obviously it is easier and less expensive to modify my current bike and I’m wondering if I’ll notice the difference enough to justify the expense of a new bike.
BTW. Our space here is extremely limited so multiple bikes isn’t an option.
Thoughts?
That is such a beautiful bike
From hard experience, install and test the spare hanger for straightness. They are not manufactured equally. I now test the bike, remove the factory hanger (I use it as the spare because I am too lazy to swop it back), install the spare hanger, test and ride.
100%. I have hangers inbound and will follow your process 👌
I do hope LGC is doing alright… best wishes for a speedy recovery!!!
Thanks Katherine. LGC may need some hand surgery due to a tendon issue, but knowing her mindset, this will barely ground her. 😄👌
Man I'm envious of that hag tool
Wasn't cheap but so worth the coin.
A little heat gun action on the hanger will make it bend easier with less chance of snapping.
A nice tip, thank you!
Hey Jom, I’ve thinking I need to invest in a hanger tool as I bent the hanger on my Lynskey GR270 in a slip while bashing muddy rutted trails in the Glasshouse Mountains, QLD on Sunday. I’ve booked the bike in at the LBS but I like to do as much of my own servicing as I can. This is specialised tool few cyclists will have. BTW good to hear some you Aussie vernacular still there after being in the US so long.
G'day Brett! The inner Aussie is alive and well. I have to wonder how much of the slang from my generation is still around? May need to record a slang video next time I am home 😄 Park Tool produce a cheaper alternative to the Abbey Tools HAG, and I am sure, some other brands as well. Perhaps go in dibs with some mates to split the cost. I put off buying this tool for many years, glad I finally bought it. I also purchased the Abbey Titanium hammer, because, why not 😄
@@GravelCyclist being of an age myself that some Aussie slang from my youth has been lost in this modern online world, I’m all preserving it or at least giving bit recognition least it be lost.
It’s the Park Tool one I’ve been looking at and they have two versions but I haven’t researched the. Benefit of the more expensive DAG 3 (Derailleur Alignment Guage) - the cheaper DAG 2.2 is about AU$169 which is a bit of moolah for a tool that isn’t use pad too often but I figure it’s good just to check derailleur alignment on somewhat regular basis as often I’ve no idea why sometimes it’s knocked out of line on road bikes although these modern road bikes have very flimsy, lightweight hangers and they can get pushed out of line just with a roughly handled wheel change.
Back in the olden days you could use a spare wheel to straighten it out. The thread for the axle and the derailleur hanger were the same. Yes, my beard is grey…
Never had a beard, it would definitely go gray.
Nice concept. However, I would be a bit afraid to do that while mounted on a carbon frame!
The bike in this demonstration video is carbon.
@@GravelCyclist Thank you! It appeared to be carbon. Obviously you’ve never had an issue with cracking a frame in doing this technique. We’ll done!
Lol, I just spent $30 to straighten my hanger.
The return on investment is not good on this tool, unless you find yourself straightening hangers often. $30 well spent most likely.
Nice Video! I am new to youtube and wondering if you have any feedback for me? Thanks a lot!!!!
I always enjoy your videos and learn a ton each time I watch. You’ve answered my questions and have helped in the past and now I have a bike choice scenario with which I would appreciate your insight.
We just moved to Southwest Florida where the riding will be different than what I’m used to with more sandy areas, less hills, etc. I do not ride roads at all and am hoping to find some nice gravel rides here.
I do ride some sidewalk areas to the beach, into town, etc., as well as some paved multi use trails here in the area.
I currently own a Giant AR 1 (All Road) with Shimano 105, 11-34 rear and 50-34 front derailleurs and I have the tires maxed out at 700x38.
My debate is whether to keep this bike and replace the front derailleur with a 48-32 “OR” sell this bike outright and buy a more gravel oriented bike.
Obviously it is easier and less expensive to modify my current bike and I’m wondering if I’ll notice the difference enough to justify the expense of a new bike.
BTW. Our space here is extremely limited so multiple bikes isn’t an option.
Thoughts?