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Thread: PSI Question

  1. #1
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    PSI Question

    Now, I know that PSI an almost entirely personal preference type of thing, but what is the average "safe" psi? I'm 305#, and just looking for a good base starting point if you will, I'll mess around with it from there to find what works for me.

  2. #2
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    I have been running my tires at high pressure (50-55 psi) since I got back into riding last spring. I'm thinking that's probably too much. I weigh about 265, and I kept the rear wheel extra firm when I rode a hardtail, to avoid pinch flats and dented rims. I'm riding a full-suspension bike now. I'm thinking I'll drop it down to 40-45 when the snow melts off the trails this year. Meanwhile, I'm keeping the pressure high, for lower rolling resistance, while I'm stuck riding roads and paved paths.

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    I'd start with the max pressure listed on the tire sidewall and then lower the pressure from there if you want/need to. When I was in the 250-290 range I usually ran about 40 psi, both hardtail and FS. The problem with high pressures off road is traction is seriously compromised. You need to find a balance between your style and avoiding pinch flats/denting rims. Low enough for max traction but high enough to prevent rim strikes. If you go tubeless then its just a matter of avoiding denting rims. Currently, I'm 225 and run 25-30 in my tubeless 29er wheels and 30-35 in my tubed 26" wheels. I'm not particularly hard on wheels and my area isn't very rocky so I can get away with lower pressures.

  4. #4
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    thank you both. i'll check the max pressure and start with 5psi below that gradually decreasing until i find ,y sweet spot. sounds like it'll be somewhere between 40-50psi

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