I've been able to shorten an already-filed caliper's reach still further by removing threads from the top side of the bolt in the area that passes thru the slot. This was a bit harder than it sounds, iir, but might yield another 1mm? On my '79 Peugeot U09 SuperSport, I actually had to file the lower ends of the slots, AND the bolt's threads, to give proper reach DOWN to a Mod58's sidewall, and this was with the original 27" wheel size! It seems the alloy rim was a few mm narrower than the original Chrolux rim, and this has the pads "diving" (climbing, actually) to the outer edge of the rim. Some dropout filing (for alignment correction, done previously) also helped a bit, but the Weinmann/Peugeot calipers should have been spec'd as 750 instead of 610. I've seen offset-bolt brake pads but would be concerned about their possible tendency to twist loose. A small bit of offset would likely be no problem. DiaCompe AGC(?) aero calipers, CLB "micro" and Campy or Shimano "Delta/AX" might also have very short reach, but I can't readily confirm.
David Snyder
Auburn, CA usa
> Esteemed listmembers,
>
> Need a front brake for a track bike. Universal 68 front is too long. I
> am pulling my hair out for a solution. From the center of the fork hole to
> the bottom of the braking surface on the rim is about 43mm. What are my
> choices. Help Please!!!
>
> Thank You!
> Jim Spracher