[brooksby]

OK, so replacing the mudguards on my bike today. Well, trying to. The head of the bolt which connects the mudguard to a bracket on the chainstay bridge sheared off as I was undoing it. So the bolt hole now has the body of the bolt screwed into it, with no way of getting hold of it at either end to remove it…

I can’t be the only person this has ever happened to… Does anyone have any suggestions for getting the damned thing out??

Thanks 😉

Topic

[Spangly Shiny]

You may need the help of

You may need the help of someone with a TIG welding kit. The process is to gradually add weld onto the stub of the bolt until you have enough material to grip with a pair of locking pliers (Mole grips). Of course if your frame is carbon that’s a non starter.

[hawkinspeter]

Probably try carefully

Probably try carefully drilling it out. Any chance of a pic?

[Welsh boy]

A drill and a stud extractor,

A drill and a stud extractor, you need to drill a small hole as close to the middle of the bolt as you can then use the stud extractor (loads of cheap ones on eBay) which is basically a tapered left hand thread, as you screw in in the taper grips the bolt and because you are winding it in “backwards ” it undoes the old bolt. 5 minute job then spend 30 seconds greasing the new bolt before you fit it ?

[Author]

Replies