Tire pressure, for on road. MTB tyres. 65psi max really max?

LaurenceGough

Hey guys,

Opened up my latest Wiggle order today, man the Muc off chain cleaner and lube is amazing, chain is like new, you should have seen the crap that come off...

I got some road tires also, but I'm going to fit them when I next get a puncture (touch wood never!) as to make use of taking off the tyres.

For now though I would like to use my new pump with my old tires.

I pumped it up to 65psi, I noticed while pumping the gauge went up (it didn't when I connected it to tire, because of 1 way valve right?) but when I stopped it would slowly go down a bit, then stop, is this just normal?

My standard tyres on my Mongoose Tyax Elite say 65psi max, I only use the bike on road currently so would I be okay running a bit more?

Also when you remove the pump head, you know the slight pop/hiss how much psi does that take off?

Thanks guys!

ride_whenever

well

http://www.youtube.com/watch?v=SDLVBPspSK4

is pretty cool. Generally your tyre will rip/blow off before you damage the rim, however if you are unlucky the rim will split and explode! I run my smooth commuting tyres at 80, even though they say 65 so that they are rock hard.

LaurenceGough

Alright thanks Ride, I'll perhaps try a little more PSI depending on if I get any more replies before tomorrow.

batch78

Got nearly 90psi in rear at moment, kinda took my eye off the gauge when filling it from air line at work and, as it hadn't exploded, decided to ride at that pressure.
Bit uncomfortable on broken road surface but bloody fast.

dav1

MTB tires are designed to be at a lower pressure then road but with a higher volume. I find that at 50psi my MTB tyres are as hard as nails, usually run them at 40psi.

my road bike tires are at 100psi but at 40 or 50 they would be on the rims.

the reccomendations are there for a reason, whilst there will be a cirtain percentage of buffer zone between reccomended and failure you should really follow them.. whilst you can send an MTB tire over 100psi in a feild with some saftey specs its probably not the best idea if you are actually going to use it.

FYI my MTB tyres say "40-65" and at 35 I pinch flatted and ripped up a tube.

hoiw quick does the needle go down again? its probably just the pressure diffusing into the tube from the valve and air hose as the valve will act as a bottleneck to the air flow.

BlackSpur

As you up the pressure, keep checking around the rim that the bead is still properly seated every few pump strokes. If it does happen, a blowoff is fecking loud!

Team515

I normaly use 40psi, and check it regulary