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Max tire size in Campag calipers?
On Tue, 15 Jul 2003 22:33:14 GMT, "Nick Burns"
wrote: What is the maximum tire size for modern Campagnolo (short reach, Record D) calipers? I am thinking about commuting by bike and larger tires would help out in many ways. The only limiting factor should be the calipers. TIA It is sometimes tough but possible to get a 28 in. If you get an inline cable adjuster at the last cable stop, you can get 32s in. With a Shimano brake with it's integral release and the Ergo lever release, 32s go in. |
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Max tire size in Campag calipers?
"Nick Burns" wrote in message
... What is the maximum tire size for modern Campagnolo (short reach, Record D) calipers? I am thinking about commuting by bike and larger tires would help out in many ways. The only limiting factor should be the calipers. Best clearance is cantilevers but barring that you could use Shimano calipers and Campag. Ergo for maximum opening power. -- Robin Hubert |
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Max tire size in Campag calipers?
Sheldon Brown wrote:
Nick Burns wrote: What is the maximum tire size for modern Campagnolo (short reach, Record D) calipers? I am thinking about commuting by bike and larger tires would help out in many ways. The only limiting factor should be the calipers. This question is only useful if you're planning to build a frame. If you already _have_ a frame, it is the frame itself that will determine this. But there's a limiting factor before that. You need to be able to remove the wheels without too much hassle. Campag brakes have the quick release in the lever, not the calipers, and this doesn't open the brakes very much, unfortunately. If one likes the pads close to rims, opening q/r plus turning cable barrel adjuster a few turns provides only just enough clearance to remove an inflated 25mm tyre, IME. 28's might be ok at a push. I would not even bother trying to use Campag calipers for anything wider. ~PB |
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Max tire size in Campag calipers?
Pete Biggs wrote:
But there's a limiting factor before that. You need to be able to remove the wheels without too much hassle. Campag brakes have the quick release in the lever, not the calipers, and this doesn't open the brakes very much, unfortunately. If one likes the pads close to rims, opening q/r plus turning cable barrel adjuster a few turns provides only just enough clearance to remove an inflated 25mm tyre, IME. 28's might be ok at a push. I would not even bother trying to use Campag calipers for anything wider. I've used tyres which actually measure about 24 mm, and they rub both brake pads when you release the brake and remove the wheel. 25 mm is probably OK, depending on how close to the rim you have set the brake pads, but 28 mm would almost certainly require deflation. Of course, for many people this might not be a problem. After all, at home most people have a good floor pump and at road the tyre is probably empty if you want to remove the wheel. -as |
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Max tire size in Campag calipers?
Chris- What is the maximum tire size for modern Campagnolo (short reach,
Record D) calipers? I am thinking about commuting by bike and larger tires would help out in many ways. The only limiting factor should be the calipers. BRBR Probably 28c but the problem is the brake bridge and fork crown, not the brakes generally. Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302 (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene" |
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Max tire size in Campag calipers?
Quoth Pete Biggs:
But there's a limiting factor before that. You need to be able to remove the wheels without too much hassle. Campag brakes have the quick release in the lever, not the calipers, and this doesn't open the brakes very much, unfortunately. If one likes the pads close to rims, opening q/r plus turning cable barrel adjuster a few turns provides only just enough clearance to remove an inflated 25mm tyre, IME. 28's might be ok at a push. I would not even bother trying to use Campag calipers for anything wider. Antti Salonen wrote: I've used tyres which actually measure about 24 mm, and they rub both brake pads when you release the brake and remove the wheel. 25 mm is probably OK, depending on how close to the rim you have set the brake pads, but 28 mm would almost certainly require deflation. It isn't just a matter of the tyre width, but also the width of the rym, more specifically, the difference betwixt the twain. This is one of the reasons I like mixing the two systems. If you have Campagnolo brake levers and Shimano calipers, you have _two_ quick releases, which, when used together, give you enough quick releasitude to handle touring tyres on narrow ryms. Of course, for many people this might not be a problem. After all, at home most people have a good floor pump and at road the tyre is probably empty if you want to remove the wheel. Hard for some folks to realize that quick-release brakes were virtually unknown until the 1970s, even though most cyclists back then rode rather wider tyres than are currently fashionable. Sheldon "Deflation Is Always An Option" Brown +----------------------------------------------+ | Every person who has mastered a profession | | is a skeptic concerning it. | | --George Bernard Shaw | +----------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
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Max tire size in Campag calipers?
Qui si parla Campagnolo wrote:
Chris- What is the maximum tire size for modern Campagnolo (short reach, Record D) calipers? I am thinking about commuting by bike and larger tires would help out in many ways. The only limiting factor should be the calipers. BRBR Probably 28c but the problem is the brake bridge and fork crown, not the brakes generally. Ditto. We build Herons so the pads are near the bottom of the adjustment slot. This gives a bit more clearance than on most frames. We can fit true 700x28s (which measure 28mm, not just labeled 28mm) under Campy dual pivots with room to spare. Todd Kuzma Heron Bicycles Tullio's Big Dog Cyclery LaSalle, Il 815-223-1776 http://www.heronbicycles.com http://www.tullios.com |
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Max tire size in Campag calipers?
In article ,
Nick Burns wrote: What is the maximum tire size for modern Campagnolo (short reach, Record D) calipers? I am thinking about commuting by bike and larger tires would help out in many ways. The only limiting factor should be the calipers. My 1999 Chorus calipers can handle a 700x32 Panaracer in back and a 700x28 Avocet in front. The 700x32 tire won't clear in front. What will work in your bike I don't know but a 700x28 is probably possible. Much depends on the frame. --Paul |
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Max tire size in Campag calipers?
snip
Probably 28c but the problem is the brake bridge and fork crown, not the brakes generally. Peter Chisholm snip I recently put some 25c tires on and the fork crown is so tight to the tire that rocks will get picked up by the tire, squeeze under the crown and enter the bottom of the steerer tube. They bounce up and down between the brake fixing bolt and the tire, making an annoying tinkling noise. And probably slowly chewing up the fixing bolt and the steerer tube. A cautionary tale for those who are overly concerned with noises and considering a wider tire. App |
#10
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Max tire size in Campag calipers?
On Wed, 16 Jul 2003 19:38:31 +0100, Pete Biggs wrote:
Sheldon Brown wrote: It isn't just a matter of the tyre width, but also the width of the rym, more specifically, the difference betwixt the twain. That's a good point - one which I hadn't thought of at all. So another reason to use wide rims for wide tyres then. Actually, that depends. When you go to really wide tires there would be a lot of reasons to get wider rims, but going up to a bigger tire for extra comfort may not be helped by wider rims. I thought about this a while back. I was wondering whether a wider tire would still fit, and thought about how the rim width would affect the clearance. The height of the tire (in cross-section) depends both on rim width and of course tire width, and that relationship is highly nonlinear. The graph of the height of the top of the tire as a function of rim width has a maximum when rim width is about 15% of tire width (from bead to bead, spread flat). Most tires are far short of that -- or most rims are wider than that -- so a wider rim will lower the overall height unless you have a very fat tire. Lower height of course improves clearance, but it will make the ride harsher. -- David L. Johnson __o | Do not worry about your difficulties in mathematics, I can _`\(,_ | assure you that mine are all greater. -- A. Einstein (_)/ (_) | |
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