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CycloCross tires w/traditional road brakes.. Problem??(5 posts)

CycloCross tires w/traditional road brakes.. Problem??gray8110
Mar 24, 2003 12:28 PM
As the whether dries out here in Oregon, I'm considering swapping my road tires on my rain bike for CX tires so I can get in some climbing on fire/logging roads.. It gives me some variety & more extended climbing than I can get just on paved roads.. my question is if I need to swap out my normal dual pivot brakes for V-Brakes.. I don't want to do this as I don't spend more money than necessary.. Will the CX tires be too wide for the brakes or will this work?
Couple of issues...Matno
Mar 24, 2003 12:40 PM
Clearance will most likely be a problem. On my two road frames that I've owned, 28mm tires were the biggest that would fit. (On my new C'dale, even the 28 was too big in wet stuff - it got sand and crud jammed between the tire and the fork). Most regular road frames just don't have enough clearance because the brake pivot has to be close enough to the tire for the brakes to reach the rims. You can check the clearance between your current tires and the brake bolt pretty easily just by looking at it...

Cyclocross frames are different in two ways: First, they have much more tire clearance, and second, they have brake bosses on either side of the wheel (as opposed to the single bolt of road brakes). So unless you have a Cyclocross frame, there is no way to run any kind of brakes other than road brakes (single or dual pivot - they're basically the same).

Hope that helps...
It's not the brakes that will be the problemKerry
Mar 24, 2003 5:41 PM
Your most likely limit will be the fork crown. If you look at the brakes, front or rear, you'll see that brake clearance and frame clearance are about the same.
ran Speedmax 700x30 on caad5, butjiggs
Mar 24, 2003 7:55 PM
worked better on dry trails as it didn't take much mud to clog them up.
Probably problematic.jw25
Mar 25, 2003 11:47 AM
Depending on your frame and fork clearances. The brakes will probably fit 30c tires, though you'll probably need to release the cable to fit them through the pads.
There are some narrower cross tires out there (Tufo makes 28's, I think there's some 27's from Vittoria, but actual size could vary widely), but there, clogging can be a problem.
Believe it or not, you should be fine on larger slicks. I ran 25mm Axial Pros as my training tires this winter, and even with all the gravel on the roads from runoff and plowing, I had zero problems. Traction was never a problem, and they're pretty cushy. They're almost too big for my frame, though.
Another option might be the Rivendell Ruffy Tuffy, or a Panaracer Pasela 30mm (their sizing is a little off, so ask around). As long as the logging roads aren't super-rough, you'd be surprised what a slick tire can get through, and how much control you have.