how much air should I put in my tires
02-20-12, 05:32 PM
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how much air should I put in my tires
I have 700 x 25c tires on my road bike, i weigh about 147 pounds, shoud I put 100 psi in ??
02-20-12, 05:40 PM
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Responses are going to vary, but the sidewall of the tire will tell you the max. I usually do about 115 psi on front and back. My maxes are 125.
02-20-12, 05:43 PM
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Probably around 95 front, 110 back.
Max means *max,* you don't need to go up that high. I weigh about 20lb more than you, and ride 23c tires (so higher pressures,) and do about 115 rear, 100-105 front.
Max means *max,* you don't need to go up that high. I weigh about 20lb more than you, and ride 23c tires (so higher pressures,) and do about 115 rear, 100-105 front.
02-20-12, 06:11 PM
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put 100 psi in. see how that works. adjust as needed. don't put more than the number on the side of the tire.
02-20-12, 06:43 PM
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Depends what you want - rolling resistance, ride comfort, pinch flats and I guess a lot of other things are all affected by tire pressure.
Max on my tires is 120psi. I pump front and back to about 110psi. FWIW.
Max on my tires is 120psi. I pump front and back to about 110psi. FWIW.
02-20-12, 06:54 PM
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I weigh 195, and run 90 psi in the front and 100 in the rear in my 700x25s. Michelin's recommendation for a 154 lb. rider is 6 bar/87 psi. For you, you might want to try 80 psi front/85 rear. FWIW, I'm running 80 psi front/90 rear in a pair of Conti Grand Prix 700x28 tires with no problems.
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02-20-12, 07:11 PM
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For your 147 pounds and 700 x 25c tires, 90 psi front and 100 psi rear sounds reasonable for starters.
02-20-12, 08:23 PM
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Just because the max is 120 or 115 doesn't mean you should go that high. Very common newbie mistake.
02-20-12, 09:15 PM
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02-21-12, 08:06 AM
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It can depend on the wheel shape as well. I use 115 on standard-shaped Ksyrium wheels, but 100 on the Zipp 101's that have a wider shape. I believe some of the Hed wheels also take a lower pressure.
02-21-12, 08:24 AM
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compliance factor. lower pressure can absorb bumps more gooder. depends on the brand and tire design though and proabbly tpi.
02-21-12, 01:13 PM
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Once you have enough air in them to avoid pinch flats, it's really up to you. Experiment with different PSI on different days riding the same route & see what works best for you.
02-21-12, 02:13 PM
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We run 110 psi with 700x25c tires on our tandem with a team weight over 350lbs, without any problems.
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02-21-12, 02:17 PM
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On my 700 25c's on my commuter I run 90 - 100 psi I weigh 160
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02-21-12, 02:23 PM
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It's a good start, but not that accurate. There are a ton of BF members over 180 pounds who run way less than max sidewall. They're not pinch flatting or bending rims.
02-22-12, 01:03 AM
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180lbs, and I run 95/120. I could probably even let the rear down a bit. I ride some fairly rough roads, and hit plenty of bumps with no issues on pinch flats. That is with Gatorskin 23's. I have had significantly less hand pain since lowering the pressure from 110 or so in the front.
02-22-12, 06:59 AM
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Most of the above recommendations are on the high side. I run 85 front/95 rear on my bike with 25mm tires and I'm 10 pounds heavier than he OP. I'd say 80-85 front and 90-95 rear would be better starting points.
02-22-12, 07:56 AM
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FWIW, it's what my wife and I use now, and since changing over to it a few years ago I've had zero pinch flats. I'm 175# and my wife is 100#.
02-22-12, 05:26 PM
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I am about the same weight and run 105 front and back. Based off of Vittoria website recommendations for my tire choice and weight.
02-22-12, 06:12 PM
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Same here...anywhere between 100-105 psi. Anything lower and it feels a bit mushy to me. When I get out of the saddle to climb I do not like a lot of tire deflection and compression.