Enargins
Member
I have a Rad Power Bikes 2018 RadCity and I noticed a slight "bump" in my left crank arm when it's at the 2:00 position. Only in the left crank arm, not the right. And it happens in all gears.
At one point I felt several "bumps" with each cycle of the crank arm. But almost all the time it's just one slight bump at the 2:00 position.
My thought is that the crank arm needs to be tightened. (Seems that if it was a bad bearing, it would be felt on the right as well, but maybe not.)
I noticed that my bike uses a large hex wrench to tighten the crank arm. I don't have anything that large. Plus, I should probably use a torque wrench for something like the crank arm.
1) Does this sound like the crank arm is loose? If not, then what else could it be?
2) Should I get a torque wrench to tighten it, or is it OK to just use a regular hex wrench until it's tight by feel?
3) Anyone know what size hex wrench is needed?
Thanks!
At one point I felt several "bumps" with each cycle of the crank arm. But almost all the time it's just one slight bump at the 2:00 position.
My thought is that the crank arm needs to be tightened. (Seems that if it was a bad bearing, it would be felt on the right as well, but maybe not.)
I noticed that my bike uses a large hex wrench to tighten the crank arm. I don't have anything that large. Plus, I should probably use a torque wrench for something like the crank arm.
1) Does this sound like the crank arm is loose? If not, then what else could it be?
2) Should I get a torque wrench to tighten it, or is it OK to just use a regular hex wrench until it's tight by feel?
3) Anyone know what size hex wrench is needed?
Thanks!