Originally Posted by DMF
You don't need to replace the crank. The threads can be replaced by your LBS.
Good call. I was sort of excited to replace my crank so I wasn't thinking in that vein, but that's really money I shouldn't spend right now. Thanks. Actually... does anyone know if there's someone out there that makes thread repair kits for pedal threads (ala Helicoil)? The Helicoils was 18tpi at 9/16". (I might start a new thread for this one, but I'll start here.)
Originally Posted by MudPie
What's perplexing is why are the pedals unscrewing themselves?
That was really more my question here. I installed both pedals the same way and this is only happening on the right one, so I really don't think it's operator error here.
Originally Posted by J.P.
It's possible that there could be drag in the pedal bearings under load even though the pedals spin freely when they are not not under load. This could happen if the bearings are too loosely adjusted; which, with use, will cause damage to the bearings and races. Is there any end play in the pedal bearings? Your description of the pedal coming out while you were climbing a hill would seem to support the idea that the pedal bearing may not be turning freely under a heavy load. Contrary to a previous post, pedaling forward will tend to unscrew the pedals if there is enough drag in the pedal bearings.
I'm not 100% sure I know what end play is in relation to bearings, but if I understand it correctly, there is about 1mm of end play in the right pedal, none perceptible in the left. I'm pushing and pulling the pedal as if I were trying to remove it from the spindle. Doesn't seem good, regardless of the type of play I'm describing. These pedals are practically new (less than a month old) and I'm a light rider (120 lbs), so I doubt I've damaged them in the short time I've owned them. Perhaps a candidate for warranty replacement?