- Hardtail tubeless psi? whats yours?
I’m exactly the same weight and height as you and never managed to stop the rear burping at lower pressures. I had to pump it up so high that it negated most of the advantages!
I was just using Ghetto tubeless mind you so that could be the issue right there…
Keen to hear how you get on though!Posted 4 years agoaphex_2kMember
All depends on trail surface. I’m about to purchase a Stan’s or Joe’s kit and do my bran-spankin-noo 719’s for my hardtail so will experiment. I’m 13 stone but 26 psi sounds really low. I’m guessing about 32 on the back and 28 front but I’ve never done TL so we’ll see!Posted 4 years agooxym0r0nSubscriber
20ish all-round (I don’t think my track pump can get much more accurate). Bit lower on the front on fully rigid
EDIT: 11ish stone 2.25RR/NN 29er – comfortable and grippy. Only bottomed out once on a really square edge going through a water crossing being chased by someone on a 6″ travel bike 😕Posted 4 years ago
So i’m just about to convert my hardtail over to tubeless and wondering what kind of psi to aim for.
Dont have a track pump yet so i’m not sure what i’ve been using with tubes so far. Up til now with tubes it’s been the finger prod test and a few more psi if i pinch flat but i know tubeless will allow lower psi for more bump smoothing and grip. Tyres are going to be 2.2 UST nobby nics
For the record i’m 10 stone, 5’6 and pretty much trail riding but on the xc side rather than the am. The exmoor classic ride from here is one of my local(ish) loops
gentlemen your learned opinions please!Posted 4 years agojairajSubscriber
The correct pressure depends on many factors: personal preference, tyre volume, tyre construction, rim width, trail conditions … blah blah blah.
Start off with a similar amount of air as before and experiment by taking some air out, test it and repeat and see what works for you.Posted 4 years agoAndy RSubscriber
clubber – Member
Andy – your formula is way off for me…
I just saw it somewhere, so I can’t take any credit (or otherwise) for it – seems to be close to what I use though, which is low to mid twenties. I can see that if someone is much lighter or heavier it’ll be way out….Posted 4 years agofeistyMember
I am 10 stone 9 lbs and I run NN Tubless Ready snakeskins at 20fr 22rr as I do have some hardpack sections and a surfaced long climb to the trail head but have run them at 12fr 14rr
Grip at those really low pressures was epic but they were a little squirmy (snakes skin sidewalls help to offset it as will your UST ones)
My Mountain Unicycle with a Hans Dampf with all my weight on one wheel lives at 18psi (tubed) and lots of twisting and side loading and has never had an issue.
You have no tube so crank the pressure down until you don’t like how they squirm aboutPosted 4 years agojambonMember
Spesh Butcher Control Front 20 psi. Stans Flow
Maxis Ignitor 2.35 Rear over 25psi. Mavic 821.
Had a Nobby Nick on the back and had to keep it at at least 30 PSI. Still kept puncturing…
11.5 Stone, rocky, steep Spanish trails. c456.
I go as low as I can before risk of pinch flats / burping / rim roll.
The butchers are AMAZING at 20psi.Posted 4 years agoNorthwindSubscriber
Depends on the tyres and on how recently I’ve checked ’em 😉
Ragley is Nevegal 2.35 on the front, Specialized Eskar on the back, both nominally at 25psi but they go up and down. I can go lower without dinging etc but the tyres get a wee bit wobbly.
Soda is Nevegal 2.5 on the front, Eskar on the back, with 20psi in the rear (it goes slower) and so little air in the front that it doesn’t register on the pump (suspension!)Posted 4 years agochiefgrooveguruMember
Anywhere from 18F/20R in snow or ridiculous mud to 26F/30R in the dry. Rubber Queen 2.2 UST, 12.5 stone of me on Flow rims.
Basically as the available grip increases I have to increase the pressure to prevent squirm. When I had Bontrager XR4 2.2 on there (very similar size) I had to run them a bit harder with like for like cornering forces because the non-UST TLR sidewalls weren’t as supportive.
With smaller volume tyres I have to run higher pressures. On narrower rims I have to run higher pressures. Nowadays I check the pressure before every ride – I kept noticing the handling being a bit squirmier than I liked it and every time that was the case the pressure was down. Even as little as 10% difference was noticeable – I’m a sensitive soul. 😉Posted 4 years agodavehMember
Unless I’m way off the mark with my musings about tubeless then I’d say it depends entirely on the tyre. My Hans Dampfs are very different to any other tyre I’ve had, the sidewalls are far stiffer and therefore pressures can be pretty low. In my book the ‘system’ stiffness = tyre stiffness + air pressure stiffness. Normal sidewalls = normal pressures or thereabouts.Posted 4 years agogarage-dwellerSubscriber
Run between 30psi and 35psi out back. Width / carcass size determines upper or lower. Currently got a Spec Fastrak out back at nearer 35 in a 2.0 width.
2.2 would run at 30 maybe a tad less.
I am 15st and mostly ride natural / xc type stuff. I have run them lower but flints and dodgy landings were taking their toll on tyres more often.Posted 4 years ago
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