[JHANguyen]

Was working on the bike today and realized that 2 of the bolts on my granny ring were missing. Upon further inspection, I found that the thread is stripped on the crank arm for one of the bolts.

Is it okay to run only 2 of the 4 bolts on the granny ring? Would that too much stress on the ring and bend it?

If it's not okay to run only 2 bolts, is my only option to replace the drive side crank arm?

Thanks!

 

[shiggy]

Was working on the bike today and realized that 2 of the bolts on my granny ring were missing. Upon further inspection, I found that the thread is stripped on the crank arm for one of the bolts.

Is it okay to run only 2 of the 4 bolts on the granny ring? Would that too much stress on the ring and bend it?

If it's not okay to run only 2 bolts, is my only option to replace the drive side crank arm?

Thanks!

No, the ring will fold. Your LBS should be able to heilicoil (thread repair kit) the crank. If not, replace it.

 

[crazy8]

you need all 4 bolts. First thing to try is to have the threads re-tapped and see if a bolt will tighten. If that dont work then you can have a heli coil as shiggy suggested or convert and ride single speed