I have a 20 speed mountain bike with a twist grip gear shifter and my gears are not...

J

jaker

New member
...working right? When i am in gear 2-5 after pedaling awhile especially when i am standing my gears automatically shift down to 2-6 and then after awhile they will shift to 2-7... im not sure why it is doing this if you no please tell me what it is and if you can how to fix it...im really good with bikes so i shouldn't have to bring it into a shop... thanks
 
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