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  • Why do you think you need 40mm of thread? Have you looked at a threaded headset? there's thread in the top nut (max 8mm) and the top race nut (again max 8mm) - usually 20mm (or even 1.75cm) is plenty unless you have a short headtube on the frame and plan on using lots of spacers...? That said if the thread really needs extending I have the tool to do it, as long as the chrome doesn't extend to the bit of steerer that needs threading (thread tools don't like chrome).

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