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Third. I just aim for 23-25 front and rear bc I can't remember what the Stans calculator advises which always took me too long to find online and now I can't find it at all. Im around 180 in normal clothes. Here's a new one that is way more in depth lol
https://axs.sram.com/guides/tire/pressure

 

Keep lowering the pressure until it's too low, then go up a psi or two.

 

When you dent a rim on a rock, you went too far

 

I’m running the same pressure on my 29’s as I did on my 27.5. I’m 200# dry, I run 25F, 26-28R. I tend to run on the higher side. I’m running 2.6F, 2.4R, trail casings. I drop the pressure a little on my hard tail but also have Cush Core in the rear because I was hitting my rim.

 

Starting point:
Kitted weight / 7, -1 front, +2 rear.

For you - 220/7 = 31.5 Front should be 30.5 psi, rear 33.5 psi.

Adjust as needed to local conditions, riding style, and tire casings.


This formula works for 90% of riders. I'm 155 kitted. 155/7 = 22. I ride 21 front, 23 rear on double down or equivalent casings. On lighter casings I go up 1 or 2 psi, on DH I drop 1 or 2 psi. Sloppy soft, drop 1 or 2, park laps go up 1 or 2.

 

I normally put my tires around 23-24 front and rear. However the truth is most of the time I squeeze the tire in the parking lot and give it an "eh, good enough".

 

is there an upper threshold to weight? 30 seems pretty high and not much higher weight and you’d hit my rims max psi

 

I’m about 185-190 without gear.

On a 170/170 with E13 enduro tires I’m running 23/28, however I don’t get too picky with line choice. Sometimes I’ll do 23/25. My wheels are lifetimed so I should live a little. I just don’t want the headache of sending them back.

 

Sounds a little higher than I was expecting, but I like the math aspect of it. I check tire pressure every ride, kind of super anal about it. Longer/smoother rides I'd usually bump a psi or two. More tech stuff I'd drop a psi or two. At 220-ish, I'm not exactly crushing any KOM's, maybe I should ride more and worry less

 

Kitted up, we're not terribly far off in weight. On my hard tail, the rim was taking a beating so I ended up putting in a Cushcore insert. If you're heavier and riding rowdy, that might be a good solution so you can still have all the benefits of running lower pressures without beating up your rims.

 

200ish geared. On mid casings like double downs/super gravity/enduro I run 24f/26r. If I have a cush cores in I will will take 2 psi off those for really loose/sloppy conditions. I generally don't run inserts on my trail bike anymore, only the big bois.

 

Getting the Giga prepped for some hot lapping. I'm fully expecting some early season loam/slop so I threw on one of my fav moto tires the Magic Mary. Also trying this new Vittoria Airliner Enduro insert in the rear for some insurance. This thing is thiccc but only 135g! I have a feeling these will replace cush pros for me. Not any easier to install.

 

lol. nice. I've been on tannus and have been happy enough with them. granted, coupled with a more durable casing and things have been pretty good for me thus far.

 

I love the Magic Mary, it's been a very good front tire for me. I think I'm running a Big Betty out back.

 

I'm probably 180-185 kitted up. 29er 2.4-2.5 EXO/EXO+ type tires usually. I run 23f and 21r and will bump it up 1-2psi in rockier areas. You can start on the higher side (mid upper 20s) and keep lowering by 1-2 psi until you feel your tires get squirmy/roll or start getting rim strikes. Go back up 1-2 from there and you have your number. For me I start getting tires rolling over before I get rim strikes, but I'm riding in the PNW where things are generally softer with less sharp protrusions in the trail.

I ran about the same pressures on my 27.5. What makes you think you were damaging your rims too much? Were you getting rim strikes? If it's not a bend from like a rim strike, wobble is probably just needing to true your wheel. With a properly built/true wheel I don't think pressure is going to matter much unless you are getting rim strikes.

 

pretty sure this is a rim strike. i couldn't get a tire to seat tubeless with this. i think theres a tool i could use to fix this now. but theres a few other spots that feel a little "flat" around the rim. not so much wobble


this is my second rear wheel. the hub on the first got destroyed and stans sent me a whole new wheel. the first had worse spots but i gave that to a friend that works at a shop. i think he used it for some experiment thing he was doing idk

 

Give it a squeeze and look how much it squishes when I sit on the bike is my method. Firm as hell for park so I don’t fold it in high speed turns. And non park I kinda just eyeball it so the rear has the tiniest bit of squish. I have trail Cush core in rear.

y’all are definitely more picky about tire setups than I am. I run whatever’s on the bike and when I want a new tire I just go with what was on there before usually. Although this year when I change I’m debating going to continental tires instead of maxis double downs but eh. I just want it strong enough to not puncture and grippy enough I’m not sliding every. I’m no weight weenie or one to cry about “rolling resistance”


Only setup stuff I’m picky about is my rear shock psi/volume spacers

 

Oh yeah for sure that looks like rim strikes to me. But jumping straight from 20psi to upper 20s might be more than needed to keep the rim safe.

I used to be less particular about it too, but the tires are your only contact point with the ground and varying psi can have a big impact on grip and feel. Such a simple thing to be precise on and add consistency to your ride characteristics.

 

Tire setup isn't just about protecting your wheels, traction, and cornering, it drastically affects the ride characteristics of your bike. It's gonna be pretty hard to dial in your shock settings if your tire pressure isn't consistent.

 

I think for me it was years of riding before tubeless where I couldn’t ride below like 35 psi without popping a tube and then riding tires where I’d wash out on loose turns. Now that tires and rims are good it has turned me into a picky tire person haha. I haven’t had a rim strike on maxxis tires in a while. I tried the schwalbes that came on my spire in trail casings and I felt like I was smashing rims on everything at the same psi.

basically modern tires have made it easier to be picky haha