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Old 05-12-10, 04:32 PM   #1
tatfiend 
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Cartridge Pad Holders for Older Road Bike Caliper Brakes?

The current road brake cartridge pad holders from Tektro, Shimano and Kool Stop all seem to want wider mounting slots than older brakes have. Current Shimano pad mounting slots are 6.5mm wide while older 8 speed and earlier Shimano and Campy brakes have 6mm wide pad mounting slots by my measurement.

Does anyone make a cartridge pad holder that fits the older 6mm slots without widening the slots?
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Old 05-12-10, 04:37 PM   #2
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if you don't want to modify your calipers, how about filing down 0.25mm off of each side of nuts?
you obviously want to make sure you get the angle correct for the slot and wheel.

that's pretty much how some older hubs are, with two flattened sides on the axle.
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Old 05-12-10, 07:29 PM   #3
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if you don't want to modify your calipers, how about filing down 0.25mm off of each side of nuts?
you obviously want to make sure you get the angle correct for the slot and wheel.

that's pretty much how some older hubs are, with two flattened sides on the axle.
That would possibly work with the Shimano or Tektro holders but not with the Kool Stop ones due to different design of the mounting hardware. I did widen the slots on a pair of Campy Monoplanar Chorus brake calipers but it just seemed like it would make collectors cringe and I wondered if there was an "off the shelf" solution so to speak.

None of the road caliper brake cartridge holders use a full diameter bolt fastened to the holder. On the Kool Stop ones the nut has a 6.25mm diameter extension that fits through he caliper slot. On the Shimano and Tektro cartridge pad holders there is a 6.25mm diameter floating nut fastened to the cartridge holder with the fastening bolt being 5mm diameter so there is not a lot of metal in the sidewalls of the nut.
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Old 05-12-10, 07:46 PM   #4
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I've filed the slots in the caliper arms wider to allow fitting Kool Stop pads and holders to older Shimano 105 and Ultegra brakes. I file the "back side" of the slot so as not to remove metal from the side that takes the stopping torque. None of the ones I've done are "collectable" and I'd rather have the better pads and easy pad changes.
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Old 05-12-10, 08:06 PM   #5
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how about V-brake cartridges?
the nut is on the outside and the threaded section is M5x1 so the OD of the bolt is about 5.88mm
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Old 05-12-10, 08:15 PM   #6
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how about V-brake cartridges?
the nut is on the outside and the threaded section is M5x1 so the OD of the bolt is about 5.88mm
hmm, well, okay, I tried this with a BR-6400 and some v-brake pads, but they sit in about 4mm further, so this would limit how far you can get the caliper open.
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Old 05-13-10, 12:33 PM   #7
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It took me some time to find cartridge holders that work with my Campagnolo Monoplanar brakes. The Koolstop and modern Shimano brakepads are indeed to wide. I am using BBB holders and they fit wothout filing anything.
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