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First race this weekend running UST tyres and interested to know what tyre pressures you run. Knowing what weight you are might help too.
I'm 71kg's and the last tubes race I entered I ran tubed Schwalbe NN's with 35psi and they, and I hated the roots. Now hoping to run sub 30psi on Racing Raplhs.
Sound okay and will I be able to go even lower.
Race series is the Southern xc btw.
As always, thoughts and experiences will be greatly appreciated. MM
Stans recommend double your weight in stone, minus one for the front and plus two for the back, as a starting point for tubeless pressures. Works for me though I'd go harder as it gets properly dry.
I'm 92kg and run std. tyres tubeless, never go over 23psi F or 33psi R.
chiefgrooveguru - Member
Stans recommend double your weight in stone, minus one for the front and plus two for the back, as a starting point for tubeless pressures. Works for me though I'd go harder as it gets properly dry.
Sounds about right.
Stans recommend double your weight in stone, minus one for the front and plus two for the back, as a starting point for tubeless pressures
For me that would be 21psi F & 24psi B. Think I will start at 25psi F and 28 B and see how it feels.
Thanks all. 😀
That'll be 20 and 23 for me then, currently running at 30.
Would this also be a good starting point for non-tubeless rims, XC717's for example?
Well Stans are American so I imagine the resulting pressures from that calculation tend to be somewhat higher! 😉
Or should that include your bike, Camelbak, et al?
Gives 21 / 24 for me which is pretty much exactly what I've always run for years...but that's with nice fat 2.35" tires, you'd want a bit more in RR's I'd have thought.
I do dent the rims occasionally and you have to keep a close eye on the pressure, if they leak just a little bit for whatever reason things get very weird and sketchy.
For me that would be 21psi F & 24psi B. Think I will start at 25psi F and 28 B and see how it feels.
I'm the same weight as you & run 20psi front (2.35 UST HR on Stan's Crest) and 22psi rear (2.1 UST advantage on Stan's Arch) without any problems.
I started with 35psi to gain confidence as I was scared of burping but after each ride I've dropped lower and lower. Currently sat at 23psi up front but still run 30psi at the back. Too much pressure I found ruined the front end on my bike, on the back I prefer a bit more pressure As I long the more connected feel it gives
20 psi front 25 psi rear in winter, bit more summer. Ardent or HR front/rear.
Stans recommend double your weight in stone, minus one for the front and plus two for the back, as a starting point for tubeless pressures. Works for me though I'd go harder as it gets properly dry.
Really? 😕
Even with tyres with paper thin sidewalls such as Schwalbe's?
That would be 22psi front and 25psi rear! I currently run 32psi front and 35psi rear in a Bonty XR4 and a UST Rubber Queen.
I'd have to have new rims after every ride if I rode with that little pressure in my tyres, and I run substantially beefier tyres than Schwalbe.
Is Mr. Stans trying to say I have no finesse and should learn some, or is he saying that I ride rougher terrain than his products are designed for?
Depends how fast you ride and type of terrain. The faster you corner on flat turns the greater chance of rolling the tyre. The more rocks the more chance of rim dings
Depends on the pressure gauge on the pump as well. Which manufacturers make pumps with accurate gauges?
"as a starting point for tubeless pressures..."
http://www.notubes.com/help_center_tire_pressure.aspx
Obviously if your sidewalls are thin, you ride 'heavy' or you're riding really fast (how many DHers are running tubeless?) then you'll need to increase the pressure. Many pump gauges are unreliable, it's worth comparing with an individual gauge to find out what your pump is really telling you.
I have a digital gauge that I'll compare to.
Think I'll just carry on with what feels right to be honest...
Depends on a lot of factors I think - terrain, type of riding, type of bike etc. I can only say I run my tubeless wheels about 30-35 PSI 🙂
Roughly 30 F & Back, but depends on the day a bit. I am just over 15 stone with kit though, so that fits the Stan's model pretty well.
45psi on the back of my FS
40ish back of my playbike hardtail
35 back of singlespeed.
30ish front
88kg
and I still occasionally destroy tubeless tyres at 45psi, guess I must keep my weight too far back.
The pinchy feely method works well as long as your mental calibration doesn't slip! For a given PSI, larger volume tyres feel harder, stiffer carcass tyres feel harder, and tyres feel harder in lower temperatures - and lower pressures work better in all three situations.
Just watch for pinch flats when running low pressure. It's quite annoying and expensive to put a hole in the sidewall of a brand new UST tyre.