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4psi (650b 2.3" HT)
3psi (650b 2.35/2.25)
18F / 21R - 'tis grippy!
Nil. Depending on when I last pumped 'em up versus how much they leak.
3psi
Front a little softer than rear. They give a bit when you pinch them and grip nicely.
5psi. 28/23 on 2.4" 650b tyres.
Eh what
0psi
a bit. maybe. depending
~5 PSI (~60/65) with 35c Randonneur Pros on a not so fat any more bike.
Stan of Notubes fame reckons this is the way to go with hsi rims and tyres
Rider Weight in pounds divided by 7 = x
x - 1 = Front tire pressure in PSI
x + 2 = Rear tire pressure in PSI
Quite a hard thumb press on rear
Less hard thumb press or press down on the bars on the front
6 and 6. And I think 18 and 25 in the normalbike (2.5 minion needs lowish pressures to work well ime, it goes pingy otherwise)
Depends on the bike, usually 10psi more in the rear than the front, unless it's the fat bike which gets +2psi in the rear.
Stan of Notubes fame reckons this is the way to go with hsi rims and tyresRider Weight in pounds divided by 7 = x
x - 1 = Front tire pressure in PSI
x + 2 = Rear tire pressure in PSI
The problem with that is that it doesn't take into account tyre width. 20psi up front with a 2.25 ron is fine for me but a 2.1 ralph @ 25psi in the rear is still pretty darn soft and I'm dinging the rim pretty much every ride.
That doesn't take into account the fact that my pump gauge might not be accurate though!
Bit of squidge on the front. Bit less squidge on the back.
I couldn't work out why my first lap at the Twentyfour12 the other week felt so sketchy; slipping and sliding all over the place. I gave my tyres a squidge & then remembered that for some unfathomable reason, I was 'tinkering' in the garage about a month before & had stuck 40psi in both front & rear.....they were way too hard!
Dropping the pressures made a huge difference (unsurprisingly 😆 )
3 or 4 psi less on the front for better grip, when I set them up but they only get checked very rarely (650b 2.3)
25psi in the front and 28 in the back. I am still using tubes.
7psi - 35 rear, 28 front.
somewhere between 2-5psi depending on what I arbitrarily decide
3 psi difference between front & rear regardless of bike or pressure (DH, trail FS & HT) & checked before every ride with a proper pressure gauge! Not that I'm anal about it or anything... 😈
Probably something around 5-8 psi.
I often set my front at 35 psi, with the rear at 40 psi, but sometimes find I let a little more out the front if I feel its pinging about too much. Usually in slightly greasy situations, where I could do with a bit more grip.
5ish psi, about 23f 28r.
About 5 PSI, 30f 35r.
Although it can vary depending on what gets left in by the last stroke of the track pump. If its 1-3psi higher I dont bother letting any air out, as I tend to lose that amount of air over ten days or so anyway - not sure if thats normal.
Interesting stuff ... who’s calibrated their pressure gauge recently?! 🙂
who’s calibrated their pressure gauge recently
Well quite. However, if you are using the same gauge all the time and know how an indicated pressure feels when out riding, it'll do.
What I find strange is recently I've noticed that on the current generation of good trail tyres, I'm generally happy with 20-26 psi in the tyres but on my downhill bike in the same conditions running dual ply tyres on tracks that aren't rough I feel I need 28-35psi. I guess that shows much better the sidewall is on modern trail tyres.
I think the only reason I feel I need higher pressures on a DH tyre is that the softer compound adds stress along with more grip from better suspension.
About 10%.
Funnily enough mine work out pretty much what that stans formula says, on the 29'er anyway.
24psi in the front and 27psi in the rear.
The fat bike is 9psi fore & aft, got a bluto so a bit more pressure seems good.
I run generally run 3 PSI difference although I do run at different pressures for different tyres/conditions. Mainly because I like to experiment and see how it affects the feel of the bike. And yes I do keep a note, along with a record of the suspension pressures and my body weight. This level of geekery is why I do not take the pi$$ out of adult pokemon Go players (or adults who collect pannini football stickers/play fantasy football who fail to see the hypocrisy in mocking Pokemon Go players)
re:calibration - I calibrate my pressure gauge once a month for three different pressure points against my track pump. That way if I use a different pump I know I am getting to the same pressures.
20 front, 35 rear, 2.4 tyres on 26" so 15psi difference here. Otherwise it's pinch flat city at the back (running tubeless, but still get holes in the tread and bead). A bit higher on the other bike with 2.25 tyres maybe 25/40...
Same on the f/s a couple of psi softer for the front on the h/t.
29er fs and hard tail. Low twenties front high twenties rear.
some in the front, a little more in the back (somewhere about 20 for the front and about 25 out back, I think)
In depends on the prevailing air pressure, track conditions, and which way the wind is blowing. Anywhere between 0.194345 milliwotsits and 0.443 milliwotsits.
Some days I just think **** it though and just go and ride my bike
2psi. 18psi in the front, 20 in the back. 29x2.4" Conti Trail King on tubesless 20mm rims.
4psi on the FS - 20f/24r. 2.3/2.35 tubeless on 30mm internal rims. I go for an extra 1-2psi in the rear if I am doing a ride with a lot of rocks and/or waterbars.
Only 1psi difference on the fatbike - 8f/9r. 4" tubeless on 100mm internal rims
20 back 18 front (given similar tyres).
Seems like for most, ~10% extra on rear, regardless of tyre size.
22F / 30R coz I keen dinging the rear rim. 2.3 wide 26er tyres.