Mtb weld repair Al frame I am looking at a full suspension MTB with an Aluminium frame. It's cheap but needs to be welded as the frame is cracked. The bike is a Cult Insomnia 52 inch. It's cracked at the lower bracket, is it scrap or worth a repair?
Presumably that's 52 cm. Generally, a crack in an Al frame (or most frames), especially in an area which gets a lot of stress makes it scrap (esp. if its supposed to be used off road). 

Given this, I'd scrap this frame.