Tyre PSI

Moo said:

I have 26 x 2.1 tyres on my mountain bike for offroad use, what sort of
PSI should I be looking at?

The recommended range should be printed on the tires. Harder will give
a harder ride, but less friction. Softer will give a softer ride, but
more friction, or riding resistance.

--
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"Every day is Saturday when you're retired."

Bob Burns
Mill Hall PA
(email is a spamtrap)

Moo said:

I have 26 x 2.1 tyres on my mountain bike for offroad use, what sort of
PSI should I be looking at?

There are several factors required to make an accurate e-ssesment; what
brand/model tire, where you intend on riding your bike
(surface/conditions), how much you weigh, what bike they are on, etc.
Your question was not complete enough for anyone to honestly answer.
On the ride I took today, I let air out of my tires for a particular
section of trail and then pumped some air back in for another.

JD.