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Old 02-13-05, 07:41 PM   #1
timhines
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Changing wheel sizes on a road bike...?

This winter I purchased a Specialized Allez bike. IT came with 700x23c wheels. I'm curious to know what factors should I take into consideration if I wanted to get someo wider wheels.

I'm not even sure if this is advised or not.

Just fishing for some knowledge...
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Old 02-13-05, 08:03 PM   #2
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The only factor to consider is if they rub on the seat bridge, brakes, or the chainstays. Other than that it doesnt matter.
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Old 02-13-05, 08:07 PM   #3
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Most Road frames are designed for a 700x25 maximum tyre, Cyclocross or Hybrid frames take the wider tyres.
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Old 02-13-05, 08:19 PM   #4
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so it's a safe assumption that I could move up to 700x25?

I plan on doing some touring with this road bike---and pulling a trailer. I know this isn't advised, but I thought widing the tires might help.
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Old 02-14-05, 05:33 AM   #5
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You could even go to 28mm if the tyre fits inside the brakes.
Do you need clearance for fenders as well?
I am currently using an old road bike wheel with a 32mm tyre. It is at the fat-end of the scale for this rim width but it's working.
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Old 02-14-05, 08:14 AM   #6
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I do not plan to put fenders on. I'll keep my eye out for some discounted wheel sets. Thanks for the info all.
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Old 02-14-05, 08:21 AM   #7
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You don't need a whole new wheel set. You just need two new tires. a set of 700x25c will fit onto your current rims with no problem. Much cheaper than new wheels.
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Old 02-14-05, 09:32 AM   #8
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sweet! Just new tires and new tubes? I'm going to have to do that.
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Old 02-14-05, 09:44 AM   #9
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You don't need new tubes. Most tubes I've seen rated to take 23's are also rated to handle 25's. Even so pushing it a little won't cause any problems.
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Old 02-14-05, 09:51 AM   #10
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I've found no real difference between 700x23 or 700x25 or 700x26.
It's really not readily apparent that the tire has the extra width, it's only a small difference.
You can switch freely, not a crisis.
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Old 02-14-05, 11:55 AM   #11
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This article by Sheldon Brown tells you what sizes of tires work with what sizes of rims. For goodness sakes, don't go buying new wheels just because you're trying a new tire size!!
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Old 02-14-05, 12:27 PM   #12
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Quote:
Originally Posted by MichaelW
You could even go to 28mm if the tyre fits inside the brakes.
Do you need clearance for fenders as well?
I am currently using an old road bike wheel with a 32mm tyre. It is at the fat-end of the scale for this rim width but it's working.
I used an old road frame with fenders and had 32mm tires. It was at the limit and I had to remove the air from the tire before I could take he wheel off. A hassle so I replaced them with 25mm tires when the 32 mm wore out, but I enjoyed the thicker tire feel. Maybe my next frame will be a tourer or a mtn bike.
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