Damaged Chainring Bolt Removal

Discuss light weight issues concerning road bikes & parts.
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Valbrona
Posts: 1482
Joined: Fri Oct 28, 2011 3:25 am
Location: United Kingdom of Great Britain and Northern Ireland

by Valbrona

It's a traditional-style Torx chainring bolt, and the two notches on the 'nut' have been damaged in my attempts to unscrew the bolt. Never actually had this happen to me in just over 30 years of cycling.

Drill it? But won't the thing just spin with the rotation of the drill bit?

Carbon fibre Stronglight Fission crankset so really do not want to wreck it.

Any advice would be most appreciated. Is there a trick that I do not know?

by Weenie


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stella-azzurra
Posts: 5072
Joined: Mon Jan 23, 2006 6:35 am
Location: New York

by stella-azzurra

You can soak it in some penetrating oil that will make it easier to turn.
Then you can use a dremel to make 2 new notches in the nut to help you turn it.
I never took drugs to improve my performance at any time. I will be willing to stick my finger into a polygraph test if anyone with big media pull wants to take issue. If you buy a signed poster now it will not be tarnished later. --Graeme Obree

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