Mountain Bike Won T Shift Gear

The problem will be the shifters derailleurs or cables.

Mountain bike won t shift gear. The global mountain bike network is the best mtb youtube channel with videos for everyone who loves dirt. Stop shifting when you find an issue but keep your bike in that gear. Turn the b screw clockwise to make the gap larger and counterclockwise to close the gap. I don t think this is a huge deal because 1st in front 5th in rear is a plenty low enough gear to get started climb the kind of hills i ll be climbing anytime soon.

Assuming its a high normal rear derailleur shift it to the highest gear turn both barrel adjusters the one at the derailleur and the one at the shifter all the way in but for a couple of clicks. They ll stretch the most when they re new. Shift to your problem gear while pedaling the bike with one hand shift your gears up until you get to a problem such as if the chain won t shift has trouble staying on the gear or skips a gear. Derailleurs can be used to loosen and tighten cables but also to align the chain.

Derailleur and gear cable problems cable stretch. This is most commonly caused by stretched gear cables and you will need to re index your gears. The second video in this. Gears won t shift up or down perfectly with one click solution.

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. The rear derailleur is the heart of most mountain bike drivetrains. Gear cables will stretch. I set it all up and when i got on the bike and started shifting the bike shifting in the back to the largest cog so lowest gear but now i am unable to make it shift at all to a higher gear.

So if you ve purchased a brand new bike or just replaced gear cables this is likely the culprit. I bought a bike trainer over the weekend and so i wanted to throw that bike on the trainer and use it for indoor use. From the full faced helmet downhill mountain biker to the lycra clad cross country rider. Most of the time a bike will shift properly with the upper pulley wheel 5 6mm away from the lowest cog.

On modern mountain bike shifters barrel adjusters are mounted on the shifter right where the cable housing exits the shifter body. But i thought i d mention it anyway. If it used to shift into low gear and now it doesn t what has probably happened is the cable housings have seated in and the cable is loose.