When and were to increase/degrease tire pressure

[BigGear]

I know there are many factors in tire pressure setting, But what are some of the basics for gauging tire pressure for certain trails.

I ride a 29er w/tubes on a hartail gary fisher parogon. Normally start around 30 P.S.I. Never been lower than 25, not even sure if I could go lower or why I should.

Did a lap around Yankee tonight with P.S.I @ 30 and felt good. But it was sandy loose and damp in spots. If there was more daylight I would ride again @ different P.S.I. But theres not and I'm always looking to be faster anyway I can.

[c0nsumer]

It's really dependent on tires, your weight, how your bike is balanced, and what you like. The best thing to do is start somewhere (like you have) and play with more and less on familiar trails. You'll find something that feels right to you, and you can then just stick with that.

[Di_bear]

Yeah, this is purely personal and really is also affected by your riding style. I ride at or just below minimum for my tires. If it feels like I'm slipping around too much, then I let out some air until it feels good. However, the first step should be to check your riding style, such as anchoring in the turns.

[b_b]

See how low you can go... Main reason I don't go lower is pinch flats so when you get one you went too low. I seem to pinch the rear more since it's easier to lift the front so I put about 5 more in back. I really need to setup tubeless for that reason and weight. Tubeless allows lower pressure. Some guys run low 20s, which is really nice up front for corner traction.

[Di_bear]

"Bicycle Tires and Tubes: Width and Pressure" by Sheldon Brown

[selma757575]

Yep, I run tubeless and usually run between 21 and 25 on my Rocket Ron's. Gives more cushion as I run rigid single speed. I have not had a flat in two years!

[kaysee]

Correct me if I'm wrong, but I my understanding was that if its muddy/sandy you can add a few more PSI since your tires will naturally be "digging in" more, giving you more traction/surface contact as is. Adding the extra PSI will keep you from having too much traction. Anyone agree/disagree?

[iamkickstand]

and lower pressure will give you a better contact patch and allow you to float more over the mud and sand....personal preference....

I don't even know what my tire pressure is, I just know there is enough in there to avoid pinch flats.

[b_b]

Correct me if I'm wrong, but I my understanding was that if its muddy/sandy you can add a few more PSI since your tires will naturally be "digging in" more, giving you more traction/surface contact as is. Adding the extra PSI will keep you from having too much traction. Anyone agree/disagree?

Disagree. No such thing as too much traction. Lower pressure is better for sand and I suspect also for mud (which I try to avoid riding in).

[BigGear]

I see volocity has a tubless conversion. Has anyone tried any of these conversion kits?

If you have to much traction, wouldn't you be able to corner better and faster.....

Trying to get more traction in corners so I can go faster without washing out. Back tire washed out and the front turned 90degreese. Could have been my falt too.

I relize that rider type and style have alot to do with it. But trying to learn when to go lower and when to go higher. Also do most riders have dif. P.S.I in the front and the rear or is this not a common setup?

[Di_bear]

I run about three higher in the front.

[utabintarbo]

I run about three higher in the front.

Odd. I run about 5 higher in the rear, for obvious reasons.

[giantone]

Correct me if I'm wrong, but I my understanding was that if its muddy/sandy you can add a few more PSI since your tires will naturally be "digging in" more, giving you more traction/surface contact as is. Adding the extra PSI will keep you from having too much traction. Anyone agree/disagree?

Disagree. No such thing as too much traction. Lower pressure is better for sand and I suspect also for mud (which I try to avoid riding in).

Leonard zinn said otherwise in a singletrack.com column not too long ago with respect to cyclocross bikes. I personally agree with you though.

Sent from my cm_tenderloin using Tapatalk 2

[b_b]

Correct me if I'm wrong, but I my understanding was that if its muddy/sandy you can add a few more PSI since your tires will naturally be "digging in" more, giving you more traction/surface contact as is. Adding the extra PSI will keep you from having too much traction. Anyone agree/disagree?

Disagree. No such thing as too much traction. Lower pressure is better for sand and I suspect also for mud (which I try to avoid riding in).

Leonard zinn said otherwise in a singletrack.com column not too long ago with respect to cyclocross bikes. I personally agree with you though.

Sent from my cm_tenderloin using Tapatalk 2

I believe the logic is to cut through the top layer of slop so you hit hard ground below, but I think CX slop racing is a whole different animal.

[gossamer]

I don't know what will happen if you degrease you tire pressure

But you should try different pressures and see what works for you , this goes under the same as which tire to use...