[Closed] tyre pressures....hmmmm

Road? I ride 100psi on 23s

Generally the smaller the volume of the tyre the higher the pressure you run. So fat tyres run at something like 6 - 8 psi, MTB tyres run in the 30 psi range, touring tyres are in the 80psi range and full on road tyres 100psi upward. This doesn't take in to account tubeless systems.

70-100psi would probably be about right, higher = faster but less comfort.

I put 80-90 psi in my 700x35 tyres

If you're doing big tyres, it doesn't make much sense to go with really high pressures to make them hard- might as well have got skinny tyres. I think mine (34mm Kojaks) are at 80psi or thereabouts, keeps some squish without feeling blobby. But there's a case for lower if that's what you like- the entire point of wider road tyres is to gain compliance after all.

It does depend what your surfaces are like tbh, I went fatter because a lot of my riding is on bad tarmac so they're actually faster overall than my old Pro 3s. But they do feel slow on the smooth stuff.

Bit low. Schwalbe recommend 65psi with adjustment of 1PSI per additional 2 kilos above 75 kg.

so i need to put more in?
its gonna be like riding a bone shaker....my concern is that like northwind i ride on some pretty horrible road surfaces...hardly any smooth tarmac but plenty of rough sections and potholes of varying sizes...
wouldnt hitting a small pothole at 20+mph on skinny tyres at say 80psi damage the tyre/rim/wheel?
i avoid most of the rough stuff but sometimes i have no choice but to ride over it

up the pressure 5psi at a time until you find a point where the bike doesn't feel sluggish but is comfortable.

Higher pressures will tend to protect the wheel (certainly the rim) and stop you getting pinch flats.

Bit low. Schwalbe recommend 65psi with adjustment of 1PSI per additional 2 kilos above 75 kg.

funny you should mention that...i'm running Schwalbe Citizens

up the pressure 5psi at a time until you find a point where the bike doesn't feel sluggish but is comfortable.

thanks for the advice :D...my mini pump doesnt have a gauge on it so i'll try that with the track pump when i get home tonight.
for some reason i was scared of putting any more in, thinking that the tyre wouldnt be able to hold such a high pressure
however thinking about it when i was commuting on my hardtail last year i was running 1.95 semi slicks with 85psi... 😯

Higher pressures are only faster on super-smooth surfaces, on typical UK roads there's a balance between lower rolling resistance from lower pressures and a firm feel for acceleration. 35Cs = max ~60psi for me unless I'm trying to avoid a lot of pinches off road and can put up with the rattly ride, much more than 60 generally is getting too hard, pings off any bumps and rattles more than it rolls. 80-90 or more sounds really high to me.

They should go *ping* when you flick em. About a A#

[quote=gonzy]for some reason i was scared of putting any more in, thinking that the tyre wouldnt be able to hold such a high pressure

Most tyres have minimum and maximum pressures written on the sides. Just experiment between those two figures and you'll be fine!

[quote=jameso ]Higher pressures are only faster on super-smooth surfaces, on typical UK roads there's a balance between lower rolling resistance from lower pressures and a firm feel for acceleration. 35Cs = max ~60psi for me unless I'm trying to avoid a lot of pinches off road and can put up with the rattly ride, much more than 60 generally is getting too hard, pings off any bumps and rattles more than it rolls. 80-90 or more sounds really high to me.
All of that.

Too many variables to take account of, just go on feel as suggested above to eliminate rolly feeling but keep it comfy. I'm amazed at how low i can take my new roadie tubeless tyres without any sort of deformation impacting handling, like 75psi on the back of a 23mm tire!