What's The Correct Tire Pressure For My Fatbike?

Posted by

9:zero:7 whiteout and 45nrth tire

Excellent question!

Years ago Stan's NoTubes developed a formula to help riders come up with the proper tire pressure for 29ers. Today we got our math on and present to you our formulas for correct Fat Bike Tire Pressure.

Stan's 29er Formula
Body Weight in lb/7=Starting Pressure
Subtract 1 PSI for Front Tire
Add 2 PSI for Rear Tire
Example 150lb/7=21
21-1=20 PSI for Front Tire
21+2=23PSI for Rear Tire

9:ZERO:7 Packed Snow Fat Tire Formula
Body Weight in lb/20=Starting Pressure
Subtract 0.5 PSI for Fat Front Tire
Add 0.5 PSI for Fat Rear Tire
Example 150lb/20=7.5
7.5-0.5=7 PSI for Fat Front Tire
7.5+0.5=8 PSI for Fat Rear Tire

9:ZERO:7 Soft Snow Fat Tire Formula
Body Weight in lb/25=Starting Pressure
Subtract 0.5 PSI for Fat Front Tire
Add 0.5 PSI for Fat Rear
Example 150lb/25=6
6-0.5=5.5 PSI for Fat Front Tire
6+0.5=6.5 PSI for Fat Rear Tire

These formulas are for good starting places. Extra Soft or Extra Firm snow conditions may require additional pressure adjustments. For Dirt, stick to the Packed Snow Formula.

The basic rule-of-thumb is to run your tires harder (higher pressure) when the snow is hard and packed, and to have your tires softer (lower pressure) when the snow is soft and fresh.  Find your sweet spot, but be careful not to strike your rims by running the pressure too low over rocks, curbs, or any other obstacles. 

comments powered by Disqus
×
×