Bicycle Mechanics - Stripped pedal; new crankset needed?
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Good morning, Bikeforums. :)
I recently purchased a Huffy 'Good Vibrations' Single-Speed bicycle from a retail-store called Alco.
It's my first bicycle; I intended to use it as transportation to work in the mornings, but I experienced a mechanical-issue as I was riding it.
The pedal collapsed when I was traveling down the road; I was in-shock, the bicycle being new afterall. I brought the bicycle to a friend, who claimed he would be able to repair the bicycle.
Well.. He used a hammer, in an attempt to force the pedal into the threads; thus stripping them. The attempt was a failure, and the threads were discovered to be stripped as a result.
I purchased another pedal, but the pedal wouldn't insert into the threads.
I has questions. :c
Do I need to purchase a new crankset?
How do I remove the current crankset? (There isn't any screws or bolts to remove. :c)
What size of a crankset will I need?
Is it possible to just purchase another 'arm'?
08-26-12, 08:01 PM
The threads on that side are reversed, the pedal goes in counter-clockwise and use a 1/2" pedal spindle. Try threading the pedal in from the back to chase the threads. Just make sure to install it correctly without the hammer.
08-26-12, 08:02 PM
There are two common pedal axle sizes, 1/2" and 9/16". Your crank uses 1/2", so first check whether your new pedals are 1/2". The photos don't show the crank's pedal threads well enough to assess their condition, but the crankarm is replaceable if it comes to that.
One-piece crank. Single crankarm can't be replaced. Hopefully, the pedal can be reattached.
If the pedal threads were defective before your friend attacked with a hammer, then you have a warranty issue.
08-26-12, 09:46 PM
The pedal coming off on a new bike is a clear assembly defect. It is a mistake with ANY product to try to "fix" it when still in warranty, as it muddies the water regarding what happened first. If the retailer is at all reluctant it gives them an excuse to not warranty the item. Normally such and occurence would call for the seller to at minimum replace the pedal, and the entire crankarm if necessary. You can try the suggestions above but you may want to go to the retailer first to see if they will agree to correct the problem.
08-26-12, 10:23 PM
There is no apparent need to replace the crank. Your friend probably tried to screw the pedal in the wrong direction and perhaps that is what is going on with your attempt with the new pedal. Also as mentioned the pedals come in two sizes; 1/2" for one piece cranks like yours and 9/16" for the rest (make sure you bought the correct size).I assume you bought a pair of pedals to replace the one with the messed up threads. If you look on the threaded end of the pedal you will see an "R" or an "L" stamped on the spindle next to the threads (sometimes there is just an L) depending on which pedal you are looking at; these stand for Left and Right as you would be sitting on the seat. The right side has a standard thread and the left is reverse. If the threads in the crank are messed up a bike shop hopefully will have an 1/2" reverse tap to chase the threads.
08-26-12, 10:47 PM
Don't let your friend near your bike. A hammer is very rarely needed when working on bicycles. I would suggest:
1) Post closeup pictures of the pedal threads
2) Post closeup pictures of the crankarm threads
3) Get a real mechanic to give you a first hand opinion.
08-28-12, 01:12 PM
You might be able to save the crank set with a heli-coil. They can be found at auto stores and hardware stores. Simply stated it is a set of replacement threads that go into the striped hole. I would think they would work well on aluminium crank arms if needed.
08-28-12, 03:01 PM
TAKE THE BIKE TO THE DEALER FIRST, and ask that everything be checked over, as if something as critical as tightening the pedals was not done there may be other problems.
08-28-12, 07:02 PM
There is no heli-coil for 1/2" spindle that I know of, and pedal threading is industry spec. There is also no dealer for this bike.
08-28-12, 07:06 PM
If that crankset has the pedal threads gone is better for him to order a new chainring set thing.
Time to learn mechanics maybe?
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