I recently picked up a SISL crank setup for XX1. The crank and spider were used, but purchased from a very reliable source, who purchased everything in August. After picking up a SISL2 with Leonardi spider, he gave me a good deal on his SISL with XX1. Well 2nd time out it felt like I clipped my non-drive pedal on a root, except when I kept pedaling nothing happened. I then looked down and realized the spider had broken allowing the crank arm to turn inside of the spider! I got the crank along with the receipt from the previous owner to my LBS to see what could be done. But upon hearing I was not the original owner Cannondale said no dice on any type of warranty, not only did they not warranty it they really didn't offer any explanation as to why the spider would have broke under normal use.
I have a new spider on order, but have a couple concerns, one why did it break in the first place and how do I avoid it again? Two, when the spider turned on the arm it kinda messed the mating "nubs" up on the crank arm and goofed the threads that the lock ring threads to up a bit. We confirmed at the LBS that a spider will fit over the "nubs" and the lock ring threads on, I guess my concern is that the damage causes some type of failure down the road. How much stress is this area under, should I be concerned?
Anyway, I have photos, but don't really know how or if I can post them since I am a new member.
Any help/advice is greatly appreciated!
Last edited by Bgoetz on Thu Dec 19, 2013 5:10 pm, edited 1 time in total.