Left pedal won't go back in?

[Randombiker9]

So i got a new bike a couple of days ago but weird thing is the pedal became loose and fell off. I tried putting it back on and tightening it with wrench but it just wouldn't tighten. Also it seems like some of the threads are missing.

How was this possible with the right one being fine and is there any way to fix it or will the bike shop have to repair it?

 

[midlife]

New bike as in brand new bike?

 

[rrarider]

I assume that you know that the left pedal has a left--hand thread?

 

[Randombiker9]

New bike as in brand new bike?

Yes since weds. But the pedal was fine till today.

I assume that you know that the left pedal has a left--hand thread?

Yes i already knew that.

 

[Bazzer]

Yes since weds. But the pedal was fine till today.

Yes i already knew that.

Then take the bike and pedal back to the shop.
Edited to add:
Not sure why you would need a spanner except for tightening. I would have expected a new bike pedal to thread at least initially by hand. If it didn't catch the threads to begin with, a spanner is superfluous.

 

[midlife]

Maybe pop back to the shop where you bought it?

 

[SkipdiverJohn]

So who fitted the pedal in the first place, you or the bike shop it came from? Sounds like ham-fisted assembly has stripped the thread to me.

 

[Pale Rider]

It is surprisingly easy to cross-thread a pedal.

Chances are the crank thread has failed rather than the pedal thread because the crank is made of softer metal.

It's possible to re-cut the thread, but a replacement crank is a simpler solution.

Could be a warranty job, but even if the shop won't play ball on that a new non-driveside crank shouldn't be expensive, assuming the bike doesn't have a pro level groupset.

 

[Randombiker9]

It is surprisingly easy to cross-thread a pedal.

Chances are the crank thread has failed rather than the pedal thread because the crank is made of softer metal.

It's possible to re-cut the thread, but a replacement crank is a simpler solution.

Could be a warranty job, but even if the shop won't play ball on that a new non-driveside crank shouldn't be expensive, assuming the bike doesn't have a pro level groupset.

Thanks,

Ok just curious if they won't cover under warranty how much does it cost on average to get it repaired? (as a rough guess as i know all bike shops are different).

 

[Cycleops]

If you've had the bike for a few days and only now had the problem you might have a bit of a flight in your hands with the shop..

You can only take it back And see what they say. Let's hope they say its their fault as it almost certainly is.

 

[marzjennings]

If this is really a brand new bike you got a couple days ago, don't touch a thing, take it back and get the shop to fix it for free. Don't tell 'em you tried to fix it as they'll accuse you of shredding the threads.

 

[alicat]

Take the bike back asap and, like @marzjennings says, say as little as possible about attempts to fix the problem. A major component failing in three days is not on. It does sound like the person who fitted the pedal cross-threaded it. You have a right to reject the goods as of unsatisfactory quality/and or not fit for purpose. In practice you might accept a new crank if you are otherwise happy with the bike.

 

[Ian H]

If the pedal 'fell off', then the chances are it at least partially damaged the threads; certainly enough to make it difficult to start winding it back in. A tap might clean it up enough to be usable.

But if it came off shortly after purchase then it should count as faulty assembly by the shop, with any collateral damage being their responsibility.

 

[PeteXXX]

A close up photo of the pedal thread might show the experts if there’s a problem. Possibly a pic into the crank hole, if your camera is good enough.

 

[Smokin Joe]

A pedal that falls off after a few days has been fitted incorrectly. If the threads are damaged then whoever fitted it initially cross threaded it. It is down to the shop to sort it for you, which I think they'll do without quibbling.