cross threaded crank arm on drive side

[pj049]

Received a mail order specialized sirrus elite 2015 on Friday. Set about installing the pedals, left on left, right on right - pretty straight forward or so you'd think. They came pre-greased from the store and after two uses, the drive crank arm pedal came loose. The thread is fully rung.

Contacted the supplier who offered a discounted replacement but accepted no liability. Completely disregarded the possibility of a faulty part, blaming the installation.
To add insult the "discounted replacement part" was available cheaper on their website.

Any ideas or similar horror shows?

 

[Yellow Saddle]

Thread replacement inserts are easy to do and a great repair. After the repair, the crank is better than new with a steel insert.

 

[mickle]

It's highly unlikely that the crank left the factory damaged. So it was damaged by you or A N Other, some through whose hands it passed before it got to you. It's highly unlikely that it was damaged by the supplier. So if you didn't wreck it - who did? It's conceivable that your bike was returned by a previous customer under warranty and accidentally sent out to you. Good luck proving it though...

 

[DaveReading]

I'd have thought that an already badly worn thread would have been apparent when you fitted the pedals. Did you notice any difference between the L and R ones as you tightened them up ?