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bainebarray 06-17-11 09:47 AM

Right Tires for the roads
I am relatively new into road cycling I own a GT series 4. I have been riding around Austin, TX (North part of town) for a couple months or so. Recently I moved to College Station where the roads are a little rougher. I have had to replace my tires and rims at least twice now due to bent rims. My current tires are 700x23c, with stock Alex R500 rims is it possible to put 700x24, or 700x25 tires on my bike, or should I start saving for a new bike?

Some other info about me: I weight 155lbs and use the bike for both fitness and commuting to class at Texas A&M. I have posted this in the road bike forum and was recommended here.

Thanks in Advance

hammond9705 06-17-11 09:55 AM

700x25 would almost certainly fit. Are you keeping the tires inflated? You'll need to top off the pressure every few days or at least once a week.

bainebarray 06-17-11 10:11 AM

yeah i have been keeping the tire pressure up the biggest issue I am having is the rougher roads are annihilating the true on my tires, and I am hoping increasing the rim size will lead to a little longer between trips to the shop to re-true my tires.

StephenH 06-17-11 11:21 AM

On a road bike, the maximum size tire you can use is usually limited by frame clearance. Do you have an owner's manual for the bike? If so, check it and see if it indicates tire clearance.

It's not altogether clear what the issue is otherwise. "Rough roads" in terms of chip seal leads to increased vibration, and larger tires will help, but it doesn't normally cause wheel problems. Bouncing off curbs or hitting major pot holes can do wheels in, but that would be partly a wheel issue and partly how you ride. Consider either using beefier wheels, or having a better wheel-builder do the work, and that would probably be a better solution that just upsizing tires.

I googled that bike up, and it looks like it may be on the low-end of the quality/cost scale, and that could be the issue with the wheels. On my bike, my original rear wheel lasted about 4,400 miles. The replacement is probably a little heavier, but has lasted about 10,000 miles now.

Creakyknees 06-17-11 03:26 PM

Try not to hit potholes and cracks... if you don't already of course. Learn how to unweight the wheels for bumps. A guy your size should not be banging rims that often with properly inflated tires.

bjtesch 06-17-11 06:39 PM

I weigh 220+ now and ride on that type of roads all the time. My wheels are wheels that I built over 20 years ago, still true. Well when I built the wheels I probably weighed 175 or so. The rims are slightly deep section aerodynamic rims, 32-hole. At my current weight with 700x23 I have the fairly rare pinch flat when I hit a hole in the road, but you're supposed to avoid those, and my tires last a long time. I'm going to build a new set of wheels and switch to 700x28. I'm building the new wheels because my old wheels use separate freewheels, my new wheels will have freehubs.

If you are starting with a relatively inexpensive bike, then your rim problem is probably due to wheels that weren't built with the proper spoke tension. You could have a good bike shop retrue and tension your wheels and they would do much better.

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