Mountain Bike Won T Shift Into 3rd Gear

It s a 12 speed with the gear shift on the lower bar. Everything is great for me except when i go to shift into third gear. Hi i have an older road bike.

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The front shifter is a shimano integrated brake and shift assembly.

Mountain bike won t shift into 3rd gear. If the chain won t run to the bottom of the cassette and shifts over the big cog into the spokes or vice versa it sounds like a bent rear hanger needs straightening or replacing. Get the latest mountain bike reviews news race results and much more by signing up for the mtbr newsletter. Fix bike rear derailleur that won t shift into highest gear small cog. I m experiencing a serious lack of sur la plaque i can still move the shift and the cage does move over the top of the two chainrings but the chain itself won t move.

Not shifting into 3rd i bought a specialized hardrock disc about 4 months ago. If it has been that way forever turn the l screw on the derailleur out 1 4 turn at a time testing until it finally goes into gear. Bike forums main sections bicycle repairs and mechanics front derailleur won t shift into third largest gear. The chain won t jump up to the largest cog.

If it just appeared. The problem will be the shifters derailleurs or cables. Went out for a ride yesterday messed around a little to find a comfortable gear to ride out in and somehow seem to have got the front derailleur stuck on the small ring. 6 main causes of bad gear change.

Grip shift gear on kids bike difficult to turn. Shift the bike into 1st gear as much as it will and while riding turn the barrel adjuster on the shifter out 1 4 turn at a time until it goes into gear. The rear derailleur seems to work that is it shift from the small sprocket to the largest but it will not stay in anything beyond the the small one. I can go between 5th 6th and 7th gears but trying to go any lower than 5 won t work as there s just too much resistance from the shifter.

I am often asked how to fix a bike that won t shift gears or will only shift to some gears. Global mountain bike network 599 694 views. Front derailleur won t shift into third largest. The rear shifter starts at 7th top gear and releases downward towards gears with less resistance.

You have cable stretch. When sitting and riding on mountain bike front gears will not shift. I can pull the cable to make the derailleur shift into third but the shifter doesn t have enough throw to do it via the shifter. The front derailleur groupo is shimano sis.

I walk through the steps to isolate and locate.