Originally Posted by
Rogue Leader
My bike has a set of ultra torque cranks which has that single bolt deep in the middle holding them together. Is that bolt a 1 time use that I should replace if I decide to remove the cranks (say for cleaning)? I found the bolt online for about $30.
These cranks have been installed for about 5 years, and I'm not sure its "that" dirty down there, but just in case.
That bolt can be reused pretty much as often as you want to. When opening up an Ultratorque crank, pay particular attention to the spring clip on the drive side cup, you will see it just behind the crank. It is absolutely needed for the cranks to work properly. When removing the cranks, remove the clip before you remove the centre bolt. When you reinstall, install the drive side crank, then put the clip into place, making sure that the clip fits fully into the small holes on bottom bracket cup. This can be tricky because you have to work behind the drive side chainrings. Once the cup is in place, you can install the non drive side crank arm and then tighten the centre bolt. With practice, installation only takes about 5 minutes