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700 x 28mm tire fir ???

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700 x 28mm tire fir ???

Old 08-31-19, 02:18 PM
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700 x 28mm tire fir ???

I am currently running 700 X 25 Michelin tires on my Cannondale. I would like to move up to 700 X 28, if possible. With a new rear tire inflated to 90 psi, I have 5 mm on each side of the chain stay and about 6mm clearance from the seat post. I have a 3mm clearance between the tire and the frame where the brake is connected.
My understanding on tire measurement is 28mm is the width of the inflated tire. I have also read that some tires vary in width, not necessarily the stated width.

I think I have the clearance on both sides and from the seat post, but will a 3 mm clearance from the brake area allow me to run a 28mm???

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Old 08-31-19, 02:53 PM
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The only way to know is to try it. The Cannondale I had would not have fit 28s. Of course is you try 10 brands of 28 tires you will find most are different sized. Even in the same brand different models vary a lot. Roger
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Old 08-31-19, 03:16 PM
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Tire height varies a lot, too. Tires designed to last a long time generally have thicker tread, and that could be enough to keep it from fitting under your brake.

But that wouldn't stop me from trying. If they don't fit, you can always find another home for them.
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Old 08-31-19, 03:27 PM
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^^^^ Yep all tires are different. A 28 is not always a 28.
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Old 09-01-19, 09:21 AM
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If you're buying a tire at the LBS, or if you do group rides, you could ask to measure actual height and width of the larger tires you want to install on a bike in the store, or of another rider. Nominal tires sizes aren't actual tire sizes. My tires (Bontrager R3) were about 1/2 mm off in width (26.5mm wide vs 26 nominal, IIRC). The wild card is the inflated-tire wheel diameter.

Still, if you have 5mm on each side and 6mm clearance for the wheel diameter it is (in my opinion) worth a try. I suspect that you'll be ok, especially if you do mostly road riding. Get into the mud and the new tire may not have a lot of clearance.

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Old 09-01-19, 02:38 PM
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I saw a Cannondale, caad 10 i think it was advertised on Gumtree fitted with 28 tyres [continentals], close up shot looked like it didn't have much clearance on the seat tube, but it obviously wasn't rubbing.
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