I was out riding with a pal, who is new to MTBing, when he stopped and shouted that his pedal had fallen off! On closer inspection the non driveside crank and had just dropped off!
The cranks in question are Truvativ Firex. Now I know they use a self extraction system on an inner and outer bolt. It appears that the inner bolt was no longer there. It must have fallen out or somesuch but I cannot figure out how this could happen. From what I can tell the inner bolt sits in the crank and the outer bolt tightens onto it. So when you tighten the inner bolt it pushes the crank arm onto the BB. How could the Bolt possible drop out??
So my pal needs to order a new bolt set. The inner bolt is an 8mm, does anyone know what size the outer is as it will need to be removed to re-fit the inner bolt!
I hope you can see what I am getting at....