I got a new bike last year. Unfortunately I was really excited to go out on it so didn’t tighten the pedals enough. The pedal ended up snapping off and ruining the thread inside the crank.
How easy is this to repair? Is it going to be expensive?
by Mostpalone923
9 Comments
Them just coming out shouldn’t ruin the threads – did you put them in the right way (reverse thread)
If both sides are goosed it will be a new crankset. Maybe £60 odd?
You can get it helicoiled, but since it doesn’t look like an expensive crank it’s probably cheaper, certainly easier, to buy a new crank. Less than £100 all in, at a guess.
worst case, new crank (or cranks) and conceivably new pedal. Sort of depends how much thread is damaged.
The natural pedaling rotation should tighten the pedals into the crank as you ride, however, so it’s pretty unusual for them to come out (that’s why the thread directions are reversed on one side of the bike).
I see you’ve commented that they went back in for you… just see how it goes, I suppose. That said, it can be pretty nasty for a pedal to come off if you’re pedaling hard (you’re quite likely to fall, land on the cross-bar, maybe fall off the bike, etc.,)
That’s less than $50 in parts (maybe a little more in a bike shop), and about half an hour of labor for a pro. If you want to do the work yourself, the tools will cost just about $50. Check out Park Tools’ YouTube channel for well done, highly detailed how-to videos.
Those threads are stripped. There’s a way to restore them with something called a heli coil. It involves tapping new, bigger threads, then installing the insert to make them the same size they were originally.
Or, since this is a consumer level bike, just buy a new crank for $60.
I’m more curious why this happened in the first place though. Is it possible the cranks were installed backwards and you backed the pedal off as you pedalled?
Those threads are wrecked. As mentioned, you could get it helicoiled but the cranks are so cheap that you may as well replace them, whilst having a mechanic ensure the pedals are properly torqued up so this doesn’t happen again! Cranks and fitting should be well under £100 total
It really doesn’t look like there’s enough thread left in that crank that just screwing the pedal in will be a safe or lasting repair.
You need a new crank, which can be found for under £40.
Just get new cranks. With your current set you can keep your chain rings. You can find something as cheap as 40£ maybe on amazon or ebay
Probably cheaper to buy a new crankset. That one should be around $40.