How Much Does Tyre Pressure Really Matter?

The mystery of tyre pressure is governed by a huge number of variables; tyre casing, rider weight, riding style, terrain, grip, weather... the list goes on! To help you make a sensible guestimate at what tyre pressure is right for you, Rich Payne is on hand to demonstrate on the rocky trails of Finale Ligure. Finale is the perfect place to demonstrate this as, featuring a lot of sharp rock, riders often turn up and have to do a bit of initial puzzling to find a pressure which works for them for the area in order to avoid smashing wheelsets and going home early.
⏱ Timestamps ⏱
0:00 - Intro
1:34 - Advantages Of Lower Pressures
2:09 - Disadvantages Of Lower Pressures
3:22 - Tyre Choice
4:59 - What About Tyre Inserts?
5:41 - Too Much Pressure
7:02 - Perfect Pressure (For Rich)
8:01 - Not Enough Pressure
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[@rider65]

In addition to the rear wheel taking more of the brunt of the trail, the rear wheel has more weight on it. The weight bias is something like 55/45 or even 60/40 depending on the bike. You should always run a couple of PSI more in the rear for proper support. It's no different than sag on a full suspension bike. You do not want to run a large delta of sag between the fork and the shock. The key to bike setup is balance front to rear, this helps with load transfer and overall stability. (Assuming a rider utilizes proper body position)

[@Bonky-wonky]

Tyre pressure is part of a system, including suspension setup and the wheels. Softer suspension or more compliant rims/less spokes/lower spoke tension can also inprove grip, without the risk of pinch flats or smashing a rim. I personally prefer slightly firmer tyres and try to maximize grip with wheel setup. Also keep in mind a heavier casing like DD or DH on Maxxis tyres can also allow a lower pressure without risking punctures or feeling wallowy.

[@KevinT3141]

I always ran sidewall max - 5 psi until my friend steered me to the calculator on SRAM's web site. There's so much data you enter into it first, I run the calc for both wet and dry, average the two and round to the nearest whole number. There's always about a 2 psi difference between front and rear, at least with my inputs. The difference was night and day to how hard I was running my tires before and I love it! I've fiddled around a bit on my own but always come back to their recommendation, it just works so well. Also, as I've lost about 70 lbs from mountain biking, I've recalculated every 5 lbs along the way and it's been gratifying to see my pressures drop while maintaining that same riding feel.

[@niq872]

i didn't know there was a calculator, according to it im like 10 psi under, im gonna try it and see how it feels because ive felt its been too mushy. the website was very usefull

[@Stengell]

Running the Assegai/Dissector combo(2.5/2.4 exo+), tubeless, no inserts... running 28psi front and rear on 27.5" x 30mm rims with approx 100kg rider weight.

[@prusak26]

Me and my mate spent a whole day playing with tyre pressures at aston hill once, letting out 1 psi out every run. We could feel the grip getting better and better, until on one run I could feel the rear rolling off and wallowing around, which was horrible. It felt like the wheel was loose. 1 psi more, and sorted.

[@jaytothesun99]

I’ve been playing around with different tire pressures for XC riding after converting my rims to tubeless, I thought harder tires like 30 psi would result in fast rolling speeds and less pedaling, which is slightly true but doesn’t make enough of a difference. I’ve found a lower pressure as low as 20psi is so much better for grip and you still have plenty of rolling speed.

[@shakingsticksatthings6628]

I'm 160 kitted up on a 35 lb Stumpy Evo with 2.5 EXO+ Assegai/ DHRii with Cushcore inserts riding my limits on gnarly trails at Rocky Peak in Simi Valley. I ran 20/20 psi yesterday and it felt great.. plenty of grip and no issue otherwise. Last time I rode 24/25 psi and felt squirly and slidey on the rocks and loose stuff. 20/20 is my happy place.

[@shanemartingreenan]

After years of riding I have found that just pumping them firm to the squeeze is just right 😂

[@JanPippel]

Pressure have a huge impact on how the bike feels…for sure. I’m running a trailhardtail with 2.4 Onza Porcupine trail tires, cushcore trail in the rear only. In such conditions like in Finale, my go to pressure is 21psi front and around 24-26psi in the rear. On my much smother home trails i prefer 21psi on both…

[@Magoo71]

I'm glad you used those techy terms like "smooshy". Now I know what your talking about.......I run 2.6 Vittoria eAgarro tires and they are both 27.5". I run 18 PSI Front and 20 PSI Rear....my eBike weighs 54lbs. This pressure seems to be the best balance of Traction and Handling.

[@88davidw]

Very useful video 👍🏼

[@alanmartinezrodriguez884]

Mi combo for my XC bike is Maxxis Ardent 2.25(front), Ardent Race 2.20(rear) at 30 psi both. I would like to run them at 25 but since I ride my bike in the streets a lot, and they're not tubeless, 30 is best for me.

[@JamesConder-pq8le]

cheers for he help guys keep it up

[@davelom22]

Good comparison for mostly downhill rides, but what if you prioritize climbing? My usual rides are a balance of both, and I find on most terrain, riding with a bit less tire pressure in the rear helps considerably with traction.

[@jimwing.2178]

Especially if the trail is damp and roots and rocks are slick.

[@j.albertogratacos2076]

PSI on a hardtail? At 190 lbs (86kg) I run low psi on 2.6 Exo Maxxis with Rimpact inserts. Because the only rear suspension you get on the rear is the tire, I play around with the psi. I typically run 19psi. During the long pre-fun climbs, I test the "dampening" of the rear by rolling over sharp rocks or roots at slow speed. If it bounces too much, I go down to 19, if it feels like there was very little rebound, I go up to 21. You'll find that these small changes are very noticeable. I love the Topeak digital gauge. PS. Great video!

[@stevebennett3587]

👌great vid, just wondering what preasures would be ideal for my mixed canal/road commute to work, im running 28/30 at the moment🤔im 90kgs?

[@whirving]

Riding on snow this is so important. I'm still getting a feel for some conditions. I run 4.8" tires on 26 x 105 rims on my bike and go down to around 3-5 psi depending on the snow (@ 165lbs). I may run up to 8-10 psi on hardpack trails but for climbing and descending in loose dry snow it is as low as possible without rolling a rim. Interesting the obvious low pressure cutoff that he felt is what you want in loose snow. Its not just faster rolling but overall control, if you have too high pressure then everything gets squirrelly and takes more effort, 1/2 psi less and you're good.

[@georgeharris1214]

I ride in the desert, and Maxxis is highroller upfront 28 psi in the rear. a maxxis aggressor 30 psi. And inserts. Plus my weight is223 lbs

[@brownzys7299]

Man I wanna go back to Finale ❤ I was for the first time in September and I wanted to go again a few weeks again but my Dads Holiday was canceled 😢

[@donbenincasa7442]

I’m on a Transition Repeater (53.5 lbs bike), I run Maxxis Assegai DH tires with Tubolite inserts and I’m 185 lbs. I run 24 psi in the rear and 21 psi in the front. I’ll up it 1-2 psi each if it’s a really fast rocky run.

[@benlax85]

I usually ride19-20psi front and rear on my maxxis minions here in Colorado. Feels like it works well for me. I'm on a trail almost Enduro. A trailduro if you will.

[@hallstewart]

A few points: a low pressure tyre flexes and sheds clogged mud easier. It makes a hardtail comfy. It makes riding wet limestone possible! You run high pressure at the back to get same compliance because that’s carrying 60% of you mass (you CoG is at the BB ie nearer the rear contact patch)

[@Channel-io1di]

I couldn't believe the difference going from 30/32psi to 24/26psi made on my hardtail at the downhill lifts. It was like I felt like I had rear suspension in comparison.

[@laramiegrinde9246]

I'm riding a full sus and I went out one day with 27psi in my rear tire and 25psi in the front. I'm running an Assegi in front and a Minion DH in the rear, both 27.5" on Spank rims. It was brutal. I skipped on the super lose rocky sections and lost a bit of traction on the roots and really steep stuff. So I went back out and had 25psi in the back and 23psi in front and that was perfect. I had absolutely beautiful traction in all terrains and it was quiet, I could feel everything and had lots of control. It was wild that barely 2 psi could completely change the ride like that. So yeah, it's really worth finding your sweet spot in my opinion. I'm anal about my tire pressures now. Oh, and I ride tubeless but so far no flats even though I'm riding some really horrible rock.

[@drmoynihan]

Tubeless 29" full suspension Commencal = 24psi front magic mary & back hans dampf. Our rides are combination of gravel mountain logging roads and single track, dry or muddy, depending on Oregon weather. My buddies says that's too hard or that look/feels great or that's too soft.😂 Rear needs to dig into the muddy uphills, so I don't mind if it's a little less. Don't want the front tire too hard, but it needs to take the hits and not fold when screaming downhill switchbacks. I am 200lbs and shock pressure is important as well. I don't fly and I do love the climbs (hate slipping tires) and the downhills are luxurious. My everyday hardtail running around our city streets, over curbs, and across park lawns runs at 35psi. Sometimes I ride my FS to work (locked in my office) and I don't mess with the psi, but it really should be higher psi if I ride it everyday on the streets. P.S. CF Neuron 29" in Thailand is the same. Lots of rain and mud, much is cross country - more highway riding because I don't drive Thailand!!!!

[@nukedathlonman]

Well, the way to look at it, is tire pressure controls a few things - the contact patch, and side wall stiffness (which you covered). Obviously the softer the side wall, the more sloppy turning characteristics. However, think about the parameters at play with pressure, esp side wall stiffness - regardless of the type of bike (full rigid, hard tail, full suspension) it is the first and most direct contact point of ones suspension (yes, even full rigid bikes actually do have a really tiny amount of suspension).

[@rider65]

Sidewall suppleness is more down to materials and construction rather than pressure. Pressure will affect overall compression of the carcass and the sidewall but has nothing to do with sidewall stiffness

[@Bertie..]

I use a Fantik Nano pump to adjust my fat tire pressure between 3 to 9 psi on rides. Its really quick and the led gauge is brilliant.

[@live4uncbball]

Carbon wheels, no inserts. Maxxis tires, Exo+ front, DD rear. Both 2.5”. 21psi. Gaps, rocks, roots, hucks into rock gardens, only single track and it works great for me

[@jdjones7469]

My philosophy is, the right tire pressure equals the best compromise between traction, breaking forces, efficiency, and safety. Run too low of a pressure, risk role off, damaged rims, and less safe ride. Also much lower efficiency, the lower the pressure, the more work it takes to ride the bike. The higher the pressure, the harder it is to control speed. Think of a solid train wheel, less of the tire is on the surface, limiting the breaking ability (and thus the safety). Also, too high of the pressure can damage the rims as well, had a rim crack in half due to repetitive stresses on my road bike (which can withstand over 120LB as rated) on a ride resulting in an sudden stop of the wheel and hard crash. Finding the right pressure takes time, but we’ll worth the effort, if anything run slightly higher to compensate for the bread down. 1-2PSI is all it takes.

[@Antjan46]

Nice review once again, thanks Rich. How much does body weight effect this? I’m a lighter rider (163cm & 65kg -68kg depending on hydration pack etc) I’m running Butcher GRID trail casing tires front and rear 17psi 19psi and it feels great on the loose rocky terrain over here in the Middle East, it even make the bike feel quieter. Q: How much do you weigh? Is my pressure too low? Ps I do run harder tires if risk of hitting square edges or fast deep G outs

[@EricBerghen]

Rich weighs around 80-82 kg, I think your pressures are fine regarding your weight.

[@AaronHendu]

I stupidly pumped my tires way up before doing a speed test on my ebike...well...guess i gotta go straigten my wheels now...something I never have to do when I run "just right" tire pressure. I am only 120lbs, i like soft tire pressure. Essentially, as soft as possible without smashing rim off the trail when bottoming out. Usually 20ish psi for me.

[@nicolasfischer8703]

I know how my experimentation went on exactly that last rockgarden of the video... destroyed rim despite cushcore... i'll never run pressures below 1.8 bar in the back tire again. I'm 80 kg

[@wangelite5279]

I cracked a carbon rim with tannus inserts. 24psi 80kg. Even if I loose some grip, I'll never go under 27psi for rear.

[@SugoDiGatto]

I've always ridden at 3BAR/45PSI, until I met a guy and we exchanged bikes for a trail, and he commented on how awful mine felt; he laughed at my pressures and we reduced them to 2BAR/30PSI, and ooooh boy how much better it feels now! I was already feeling good on my bike despite the high pressure, but now I can't go back! I won't go lower because I ride lots of flat compact roads and I don't want too much drag, but it was one of those variables I never questioned!

[@rider65]

The drag or what you're referring to is the coefficient of friction is not highly effective by tire pressure, it's a false premise. And it's mostly inaccurate because of the significant surface changes and hysteresis losses. This goes for any surface. The more your tires stay in contact with the surface the more efficient the energy output is. The more you bounce results in inefficient and more power loss. Proven fact. Physics. 🙄

[@SugoDiGatto]

@@rider65 definitely not; the more a tyre deforms, the more energy gets dissipated in that action, which you don't get back. If you ever get a puncture, you notice right away that the rolling resistance increases noticeably. Physics 🙄

[@SprSonik13]

literally the only contact you have with the terrain. Steering geometry, seat tube angle, fork offset, braking forces, acceleration, etc…etc…etc… all depend on proper tire pressure for optimal performance. yet there are people who freak out about a half a degree seat tube or head tube angle, but they’re running five psi more than they should be…

[@nathanshipman4900]

I go off my rim getting dinged…. I start higher and take away until I get a run hit then go up a little bit. I am at 33 front 37 rear. I am also 240 with a 40 pound bike and ride very hard and fast. I have the DH34 front and rear. I had 32 in the front and blew up the carbon rim so now I run 33 same trail and haven’t had a problem since.

[@gmbn]

Sounds like you've got your setup dialled! 🤘

[@darrinkulyk9560]

I Ride CF Warden CF Demo8 2.50 Assegai DD MG F / R 23psi . AMAZING Tires Ride Vancouver 😎

[@godspeed821]

What pressure would you recommend for front maxxis assegai 29 / 2.5 maxxgrip DH casing that's on a trail/all mountain bike? it's mostly pebbles, fist sized rocks, cliffs, loose sand. In the rear i have minion dhr 29 / 2.4 dual exo. currently i run assegai at 23 psi and dhr at 26 psi and i weigh 100 kgs. I don't do jumps or drops, only riding.

[@JB50713]

As an amateur biker I really didn't think I'd notice much difference when changing tire pressures. Wow did I ever! I can now tell if a tire is 1 psi low or high now. Lol

[@zdravo4]

Well few days ago I bought new tire pump, it’s Topeak JosBlow Mountain Ex. It has big 3,5” pressure gauge which goes up to 60psi only and it has thick barrel which has 50% more volume than majority of the floor pumps. I just lome my new pump! As perverse as it sounds. 😂

[@blairrighton6270]

since riding 26' HT's off-road from the late eighties I found running 55/60 psi F/R is an ideal balance but I enjoy a 'loose feel' to the qualities said pressures give... can't imagine running pressures under 50 psi

[@AaronHendu]

Ouch...that would rattle the teeth out my skull round here in my esscarpment town.

[@ggbear1043]

Wow alot of tubless tyres dont even take that psi

[@whirving]

I ran lower pressures back then 32psi front and 40 rear, but there was the threat of flatting. Of course I weighed 135-40lbs race weight and ran 1.9 tires most of the time. Definitely a different approach, crazy how it changed. I now run 29 x 3" at 18 front 20 back, so much better and not slower even on the flat smooth trails. You just rode with the tire feel that the higher pressure gave you, we rode different then I believe.

[@vikingonabike8116]

I run really high pressures too. I mostly ride urban freeride and DH trails. 50 front 80 rear on maxxis minions. In the 10 years or so I have been running these pressures I can honestly count on ONE hand how many punctures I have sustained.

[@denistuohy6420]

30psi ish for me, especially for cheaper tyres, if I'm cycling my mtb on the road then i use around 40 psi minimum

[@Orech9]

Can you go under minimal tire presure writen on the tire??

[@Evitax09]

Is it safe to ride @1.4/1.6 bars without inserts on carbon rims with downhill tyres ?

[@billderas3420]

Totally agree with you about air pressures; but, "How Much Does Tyre/Tire Spelling Really Matter?" Not much! 🤣🤣🤣

[@quovadis5172]

I don’t ride these very well manicured type of trails. My tyres need to cope with bushveld rock, pendorings, the odd ystervark pin and the like. So, for me that means 2,5 bar at the back and 2 bar up front. Providing I have really good quality tyres that can take the punishment. In my case, that means Continental Cross King Two’s.

[@BigSmartQuiz]

Where is this you're riding Rich? Anybody know?

[@alexp6409]

What trail is this?

[@ChefChrisRoss1972]

I find if I go too low it’s harder on climbs so if I’m climbing and doing downhill should I just try to get a happy medium?

[@LaurentiusTriarius]

I run a different pressure almost every week or so. 28psi to 36psi (now it's winter here), all my bikes are tubeless I play often with tire pressure on the spot. I don't think there's a golden rule or formula, it's about feel.

[@bikerjon8934]

I'm high (psi) 60/80 F/R

[@bitumen83]

That red Giga deserves red ZEB 🤘

[@Frorideism]

30PSI in my minions

[@vikingonabike8116]

That it? I run 50 front and 80 rear.

[@tonwhelan]

Fatso

[@mic_mtb]

Heavy rider here (about 132kg on a 160mm Enduro). Running a DHR2 DD on the Front (2.0 bar) an a Dissector DH at the back (2.4 bar). Both wheels with a Tannus Armour tubeless. Rims are good so far this season, doing 8m jumps und enduro lines without any puncture or other problems 🎉

[@c4l1f0rn143000]

So just to clarify? 180tpi DD minions.. are less durable than their 60 tpi DTH? more tpi , less durable i been buying tires wrong my whole life..

[@Major_Okwiri]

#AskGMBNtech Hi guys I have hardtail Liv Tempt from Giant bikes the rear axle keep breaking could have to do with tyre pressure, my weight I'm over 90kgs I use the bike mostly for commuting to work and some simple group rides no extreme offroading I have changed the axles more frequent and it's denting my wallet. It has a block 7speed freewheel by changing the hub to that of a cassette 9 or 10 speed solve this issue

[@Chops00]

This is great in theory. But if you like to ride technical stuff fast and don’t have a wheel sponsor or inserts, I recommend 30psi+ front and 40+ in the rear.

[@Channel-io1di]

40+ in the rear will probably blow a tire on a hard impact.

[@Chops00]

@Channel-io1di false, you clearly haven’t tried it

[@Channel-io1di]

@Chops00 ya you're probably right. But I'm 220lbs and ride a hardtail. I could see it blowing out on a sharp rock. I run 20 front and 22 rear when riding downhill stuff.

[@Chops00]

@Channel-io1di The stuff I’m talking about riding you wouldn’t want to be on a hardtail for. I tried running 35psi in the rear and got dents two rides in a row. I weigh 170#.

[@Channel-io1di]

@@Chops00 the stuff most people wouldn't ride a hardtail down is the stuff I want to ride a hardtail on.

[@DarkstarDarth]

Rolling resistance

[@Cous1nJack]

Orange up front apple on the back. Or what ever that is in bar

[@gmbn]

Apple is a bit firm for me! I run clementine on the front orange on the back 🍊

[@mark1webb956]

@@gmbn nice soft orange on the front. That's what the coach advised for us. Works out at 20psi in the front, 22 in the back for me.

[@bionic909]

I run 21/24 but im 105kg

[@dvs620]

Goes, 25/28 and talks about higjer tore pressure. Meanwhile Sam Pilgrim is out there doing downhill trails at 65 PSI. 😆

[@REB4444]

Sounds great...till when you spend over 50% of the time climbing, then what. This is what I hoped you were going to cover.

[@gmbn]

The same applies for climbing, a lower pressure will help with grip at the addition of rolling resistance. The aim is to find a happy medium. You could try a slightly higher PSI if you are climbing more but your bike may feel a little skittish when descending! Suspension lock out would be the best option if you're looking for maximum climbing efficiency without the sacrifice for going back down the hill! 🔒

[@IndigoBikeTouring]

80 psi all day every day

[@tonyv2382]

Give it a frash 😂

[@johnschmidt5412]

I run a little higher pressure in my tires and then soften my suspension.

[@rider65]

🤣🙄🤦‍♂️ a lack of the basics of physics...😂 I suggest Jan Heine articles regarding Tire construction Tire width compound and tire pressures. By running stiff tires and a soft suspension, you're not accomplishing anything that would be accomplished by the right tire pressures. The first initial and continuous contact and absorption of vibrations in oscillations is your tires. Those vibrations and oscillations ie energy then get transferred through the wheel through the suspension and frame and through your body. The correct tire pressure also optimizes braking effectiveness.

[@PaulFlude]

I hate to tread here but Tyre is a city in Lebanon. I think you mean tire.

[@Cous1nJack]

You’re making me fatigued.

[@gmbn]

I see what you did there 👀 In the UK we spell it 'Tyre' it's the same in a few places but there are other places in the world who spell it 'Tire' like the US for example! 🤘

[@hallstewart]

this entire talk of tyres is tiring

[@fud1376]

Been riding decades and never used a gauge in my life, I pump the tyers up till they feel hard n I'm ready to go....Ha !!

[@rider65]

🤦‍♂️🤢🤮

[@AaronHendu]

Tires should not feel hard and you are probably at 50+ psi if they are. Might as well get rid the tires air altogether and just ride rubber to rim lol. Id break my teeth lol

[@tomrodriguez9052]

40psi and tubes....

[@gmbn]

Hold on tight, it's going to be a bumpy ride!

[@tomrodriguez9052]

It's all in your POV, after riding trails on a Gravel bike, it seems like riding in a Cadillac.@@gmbn

[@kevindean9613]

Sorry computer generated noise/music put me off .

[@fredman1085]

So, what did we learn. 1) tire pressures can be too high. 2) tire pressures can be too low. 3) There's a good middle ground. Got it.

[@Fitnessdrama]

Not enough that anybody should care if you find it to low/high bring it up/down very simple

[@anthonybwalya139]

You sell any used bikes?

[@awfully.average]

Aim for 30% sag

[@rider65]

Yeah whoever told you that is a complete fool and has no concept of physics and or biomechanics. 30% sag! 🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣 Oh boy...

[@user-tq3ud9zi7w]

All theory and no actual practical advice on pressures.

[@donaldkilgorejr.8484]

30 front 30 rear mountain biking. sometimes 28 in the rear if its alil muddy/ wet out