So with any tyre pressure you can grab a online calculator (Silca) to find out what you need roughly.
However for certain specifications that suggested pressure can go below the minimum rating from the manufacturer.
The tyre in question is:
https://www.schwalbe.com/en/Energizer-Plus-11101370 47-622
If I were to put in the max weight the tyres can handle the suggested pressure is still below the Minimum rating of 45psi (the max weight is 218Kg but the calculator only goes to 205Kg which suggest 43psi)
Obviously if you were to over inflate them it can cause damage to the wheel over time.
Under inflating can cause dings to the rim etc.
However if you got that same tyre but a 40-622 size with a 200Kg max weight your looking at 56psi, which is between the 50-85PSI rating but still on the low end.
So it leaves me with a few questions:
- Should I buy tyres of a certain width that is within the min range for my total rider weight? (bike included)
- Are minimum and maximum tyre pressure ratings just arbitrary when calculating total rider weight? (max pressure being overkill and minimum being a loose term due to terrain use case like off road tyres.)
- Would tyre width be purely a grip focus on the road?
by Tiberiusmoon
1 Comment
1) that tire doesn’t work like tires that the pressure calc is made for. The thick rubber tread doesn’t conform like a thin race tire.
2) the is a wired tube tire. The pressure is there to protect the tube and sidewalls of the tire from the rim for the most part
3) set the pressure for the surface you’re on. Off road with rocks and roots or soft surfaces = as low as you can go without hitting your tube or rim. Smooth dirt or gravel = 30 to 50psi. Roads = 50psi+. The tire size should support the tire pressures needed – meaning if you need to ride on snow, you need sub-10psi, meaning you need a big tire that can keep the rim from hitting the ground.