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Old 08-07-03, 05:54 AM   #1
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Tire presure


it says that my tires on my trek 520 can be pumped up to 100psi. is it ok to pump it up that much when you are moderatly loaded (50 pounds)?
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Old 08-07-03, 11:38 AM   #2
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Sure. Even if you want to back it off a bit for a smoother ride, you'll probably want to stay near the top range to avoid pinch flats. I carry about 35-40 pounds loaded and run my contis to 120.
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Old 08-07-03, 12:45 PM   #3
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The bigger the load, the higher the pressure, within the limits of the tire. I've never had a pinch flat on a touring tire following this rule.

Sometimes the hard part is determining the true "limits of the tire," which can vary with the rim you mount it on.

Training: 2002 Fuji Roubaix Pro (105 triple)
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Commuting/Touring: 2000 Novara Randonee (Sora/Tiagra/LX, fenders, lights)
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Old 08-07-03, 12:46 PM   #4
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depends on the size of the tire.It should say on the side of the tire the reccomended tire pressure.
Use that, and you'll be fine. The advantage of that pressure under load is that the ride will be smoother. I like to run my tires just a hair soft to get a smoother ride.
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Old 08-08-03, 08:22 AM   #5
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Unless I'm anticipating very poor road conditions, I generally run my tires (700x28) at or slightly above the max rated pressure. Typically, this means about 120PSI for commuting and ordinary touring.

For whatever reason, if I go much below 100, I seem to have far more flats (not pinch--just regular punctures). Not sure if it is related, but it seems to be.

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