Locknut on 105 calipers fouling headset. Any ideas?

Posted on Mon 12th, January 2015

• #1

quickerbybike

I've found some 105 calipers to replace the (useless) Veloce calipers on my bike. Frame is Affinity Metropolitan.

The locknut at the back of the Campy calipers had a flat top and bottom, so even though the drilling in the fork is close to the underside of the headset, there was room.

But the shimano caliper has a round (12-point, 13mm) locknut and it completely fouls the bottom of the headset.

This must happen a fair bit on track bikes. What's the answer?

File down the locknut? But how would I get it on and off then? Not that I'd ever need to.
Put a big (4mm?) spacer between the caliper and the frame? Use what?

Any ideas would be great.

Martin
• #2

quickerbybike

Nobody had this issue? I think a spacer is the only way. But what to use?
• #3

Scilly.Suffolk

http://www.sjscycles.co.uk/dia-compe-dc56-1-2-moon-washer-front-each-prod31392/
• #4

4candles

Spacers will help, i had that issue with DA7402 calipers touching the headset a 2mm serrated spacer worked a treat. I did have my grinder ready to flat top the locknut in question.

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