2021年2月14日 · After a few pedal-strokes the rear derailleur completely gives out and the pedals drop to catch up. After much googling it says the most common thing is rear derailleur adjustment is needed, so I h...

Another cheaper and easier solution is to get a chain watcher. There are several types and brands such as N-stop, K-edge, Paul Components. This will sit on the inside and/or over the top of your chain on the front chainring which will help prevent the chain from jumping off the front ring. They are used widely in the cyclocross world to prevent ...

2024年11月22日 · The bike is a KTM ultra Flite from 2010 with 9-speed cassette Shimano HG50, rear derailleur Shimano Deore XT Shadow and front derailleur Shimano Deore with 3 speeds. Some weeks ago I started to have the problem that when applying a lot of power to the pedals, the chain was slipping (not jumping to another gear but just slipping).

I've got a Shimano Sora on a 8-gear cassette, and have odd behavior and skipping, shifting under stress. This started with a trip to the mechanic for a tune up which replaced the chain. I had some

2012年2月2日 · The part about replacing the cables & housings, derailer, chain, shifter and cassette should precede the part about frame failure, otherwise it can give an impression of jumping to conclusions before exhausting the usual culprits, for those who don't read comments.

2014年10月3日 · I've started to develop a problem in the rear derailer where when I shift to a higher gear/smaller cog, the shifter "jumps" multiple gears. Happens whether I'm on the middle or big chainring in front. And yes, I know it's jumping multiple gears because it takes multiple shifts to get back into the gear I started from.

After putting everything back on I indexed the gears - finally getting the hang of the front but first time indexing the rear derailleur. It all felt fine on the stand, but when I go uphill with the rear gears on the lowest cog (6), when the pressure is on the pedals I get a weird jumping, clunking thing keep happening.

2017年11月6日 · You mean while the bike is in mid-air? The change in angular momentum will induce a very slight forward tilt. Of course, if you engage the front brake in mid-air and hold it while you land the "forward tilt" will be quite a bit more pronounced -- in the worst case you would break your neck.

2024年4月21日 · This is an easy fix albeit I will caution you, what I refer to as 'chain jumping' is one of the more dangerous scenarios when riding a bicycle. Each time it jumps, from pushing hard on the pedal, the worse it becomes. For the moderator, my experience comes from building over 400 bicycles, 2/3 of these vintage mountain bike conversions to road bike.

Putting aside the question should one ever ride on the sidewalk, I would like to jump curbs safely and seamlessly. Assume a hardtail mountain bike with high saddle (we are in the city), at a speed...