Tyre pressure for a mountain bike please?

Question

Tyre pressure for a mountain bike please?

Answer 1

You can and probably should use the specified psi on the tyre wall and a pressure guage but I never have - brick hard will do you just fine.

Answer 2

It will be written on the sidewall of the tyre - something like "max inflation pressure 45 PSI".  

PSI=Pounds per Square Inch

BAR = atmospheric pressure (1 bar=normal pressure at sea level approximately)

If it's a slick or semi-slick tyre (no knobbly bits) I think it's about 45 PSI.  With knobbly bits I wouldn't go above 35 PSI.

Answer 3

Depends on what kind of riding you are doing. If you're headed out on technical trails with a lot of logs, rocks, and roots, you're going to want low tire pressure (30-40 psi) to increase your tire's ability to form around the obstacle and ease your travel over it. High tire pressure (50-60psi) will cause your attempts to mount these obstacles to be a bit harder as your tire will be more prone to bounce off the log, rather than into it and over.

For hardpacked dirt and roads without obstacles to get over, I'd suggest higher pressure. Go with the pressure indicated on the sidewall of the tire.

Answer 4

35-40psi dont go higher or your tire will be as hard as arock.

Answer 5

The range of acceptable pressures is printed on the sidewall of all tires.   Run the pressure towards the lower end for rugged, off road biking, and towards the high end for hard trail riding.

Answer 6

The info on your tyre walls will probably be useless. I just looked at 4 different makes of tyre in my garage and they all give pointless info like "35 - 85 PSI" or "Max Inflation 65PSI". I've seen MTBers running anywhere between 22PSI & 50PSI depending on the conditions @ the time and personal preferences. The average seems to be 30 - 35 PSI. I run 40PSI front & rear mostly. This loses me some grip and can be a bit uncomfortable on my hardtail but I hate punctures interupting my fun and find I rarely (if ever) suffer them at these pressures. When running around 30PSI I suffered pinch flats on some of the rockier trails

Answer 7

If you look on the tyre it'll give you the BAR and PSI pressure correct for that tyre.

Answer 8

Depends upon what you want to do.  During the winter, when the ground is soggy, but I will probably look at doing a bit more road work, 45 psi.  I will usually keep with this in the summer as well, depending upon the terain, as it is a good pressure for avoiding pinch flats.  One of the main considerations for this though is speed.  High pressures mean less rolling resistance.

However, if I am going to a trail centre or am expecting lots of rocks and roots, then I will run with less pressure, since grip is becomes more important when facing technical stuff.  So, depending upon the terrain, between 25 - 35 psi.

This is based upon a Panaracer Fire XC Pro, 1.8.  This is a lightweight race tyre and, therefore, has thin walls.  This means that it requires a higher pressure to achieve rigidity than something with thick sidewalls.

However, a good middle ground pressure would be about 35 psi.

Luck

Answer 9

if you look on the side of the tire it will tell you but most NOT ALL run 40-65 psi