Skinny tires and big butts

Discussion in 'Cycling Equipment' started by Ikarian, Mar 17, 2010.

  1. Ikarian

    Ikarian New Member

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    Hello all-
    So, after many years without a bike, I was dying to get back into cycling, but kept holding off because I never had the money to buy a decent road bike. Finally, I decided to get a cheapo bike to at least get me out there and riding again, so I picked up a Schwinn Tourist, which is a pretty nice little bike, all told, considering the price.

    The bike has aero rims, which is nice. However, I'm tipping the scales at about 260 lbs at the moment (planning on using that bike to bring the weight down to about 200) and the tires seem to be having a tough time holding my weight. Riding with the air pressure that was set when the bike was assembled I was pretty close to riding on the rims. As of now, I am a few PSI over the tire's rating, and they are still a little flat.

    I'm trying to find out my best option here. Is it better to A)Stay off the bike and hit the gym till I lose 30 or so lbs? B)Buy wider rims/tires? C)Continue on and hope I don't get a blowout in a sktchy neighborhood?

    At the moment I'm unemployed (which means plenty of time for riding!) so I'd like to consider option B as a last resort; I'm really not in a position to spend much money on the bike at the moment. Any ideas or suggestions? I would greatly appreciate it. Thanks!
     
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  2. root

    root New Member

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    260 lbs doesn't sound like it should be so heavy to make the tires flat when you sit on the bike. I have certainly seen people heavier than that on 23mm wide tires with about 110 PSI pressure with no issues. So I would question the accuracy of your pump gauge?

    But I don't think pumping the tires to a higher pressure is a good solution since it affects the harshness of the ride (the higher the pressure the more you feel road chatter and bumps). So as a cheapest alternative you could simply try putting wider tires on the same rims. I would perhaps go with 25mm wide tires or even 27mm if you are not concerned with performance too much. Going wider than that is going to give you that mountain bike feel more than road bike feel.

    But like I said 260 lbs should not be an issue even with 23 mm tires if the pressure is really 110 PSI (most road tubes/tires can be pumped up to 120 PSI and some to 140 PSI or more).
     
  3. PeterF

    PeterF New Member

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    I'm a cheeseburger or two less than you and honestly have had no issues for years on 23mm clinchers. In fact my most recent road flat was on 24mm tubular tires (yes you can pinch flat those too). I like to run about 110 psi on the 23's and like light weight tubes. Personally I find the smaller light weight tubes have less material in them to pinch than the standard tubes.

    I am getting some 25mm clinchers just because I like the feel of the bigger tire more, but 260 is certainly within the range for 23mm tires. I would however not recommend low-spoke wheels...
     
  4. Ikarian

    Ikarian New Member

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    I'm not really worried about road chatter at this point. I've got a decent pair of padded gloves, and all the riding I'm doing right now is on a paved bike trail (used to be a railroad line. Perfectly straight and level) I'm just worred about a blowout with the tire pressure being too high. I will keep an eye on the psi, and try to keep it within the range listed above, if you guys think it will be fine despite the weighted load. Thanks for the advice.
     
  5. PeterF

    PeterF New Member

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    I think you should be fine as long as the tires are rated in the 110-125psi riange.
     
  6. tafi

    tafi Member

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    Adding pressure relative to the rider's mass won't affect this. If the pressure is upped for a lighter rider then yes, the ride will be more harsh, but a heavier rider will need more air for the same suspension effect as a lighter rider at a lower pressure.

    As long as the tyre has a decent factor of safety (and they usually do), it should be fine.
     
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