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Sep 18, 2003 10:53 AM
My wife's got a hybrid and it has something like 35mm tires on it.

What's the thinnest I can run. Can I run a 23 or 25.

Just want her to have the easiest bike for our upcoming 25 miler.

I wanted to buy her a Lemond but she's balking.
Measure the rim width...TFerguson
Sep 18, 2003 3:26 PM
Anything equal or greater than the width would be fine.

Thanks! I was clueless on this one. nmlotterypick
Sep 18, 2003 3:39 PM
thinner not always easieroff roadie
Sep 18, 2003 5:14 PM
Its debatable if thinner wheels make for easier riding. Its generally agreed that they actually have MORE rolling resistance at a given pressure, because they have to flex more to form an identically sized contact patch.

Why do people use thin tires then? With thinner tires (and rims) you can run higgher pressures, which would push the bead off on a bigger tire. Also, thinner wheels (tire / rim combo) offer a bit less frontal area, thus bit less aero drag.

If your wifes tire / rim combo is rated for 90 psi or more, I don't think things are gonna get any better with a thinner tire, unless she's doing a lot of fast solo efforts. If this is her first long ride, the comfortable ride provided by a larger tire at lower pressure may help her "stay strong" more than a microscopic increase in effciency.
May find them easier due to other factors...TFerguson
Sep 19, 2003 4:23 AM
Hybrid tires usually have tread. Going to a smooth tire will make a huge difference.

Good pointlotterypick
Sep 19, 2003 12:58 PM
I think her tires do have a tread. I'll measure and get a smooth tire.

The main reason I was thinking about thinner was to get the weight down.

I thought, getting a lighter tire that rides good, will be better and make her long effort easier.
both trueoff roadie
Sep 19, 2003 11:01 PM
A true slick is a bit easier, and that will add up over the miles. There's pretty wide slicks out there, but they can be a bit heavy.

OTOH, My GF's Trek 7500 came with 700x35 slicks that, IMO, give a much more comfortable ride at 85 lbs than a skinny tire at 100 would, and I'd so no reason to replace them for a 25 mile ride. We alredy do 10-15 at a stretch. Her rims could mount 25's with no problem, but I don't think there would be any benefit.
Then again, I feel comfortable doing 25 mile road rides on my SS mountain bike, so I may be underestimating the level of "technical assistance" a novice rider needs / can benefit from.