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Tire Pressure Recommendation(4 posts)

Tire Pressure RecommendationAlanE
Jan 23, 2002 6:44 AM
Hi All,

I just bought a Fuji CX bike. It has Ritchey Speedmax 32 tires that show recommended tire pressure of 45-80 psi. To me, that's a pretty wide range, and my inclination is to go to the maximum pressure, as I do on my road bike, to avoid pinch flats and minimize rolling resistance.

I was wondering what pressure do other CX'ers run, and for what types of conditions. I bought the bike primarily for riding dirt roads and trails, but I would also be putting a lot of miles on paved roads en-route to the dirt roads/trails. May also get coerced into local club CX races.

Thanks. Alan
re: Tire Pressure Recommendationclimbo
Jan 23, 2002 11:19 AM
80 psi will kill your hands/body on trails, even fire roads. On the road you can run it high but when you hit dirt you'll want around 50 to 60 for comfort and better traction. Go as low as you can get to feel comfortable without risking pinch flats. The Speedmax is fairly narrow, I have a set of 700x30's and I need to run a good 55+ to be safe from pinch flats and I weigh 155 lbs.
re: Tire Pressure RecommendationAlanE
Jan 23, 2002 12:16 PM
Thanks for the tips. I should mention that I weigh about 190, so I'll probably want to run a bit more than 55 on the dirt. So far I haven't noticed much discomfort at 80, especially compared to my road bike, but I guess the ride is bumpier than it needs to be. I'll experiment around and keep a couple of spare tubes handy.
re: Tire Pressure Recommendationstr8dum1
Jan 24, 2002 9:51 AM
in my tubs i run between 25 and 35 psi for cx races. for clinchers i'd say around 50 psi. it more a ride and feel.

make sure you are using CX width tubes and not road tubes. that is very important to how low a pressure you can run. thin road tubes blown way up will snake bite pretty easily