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Your killing my Strava
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Discussion Starter · #1 ·
I am running a 2.35 front and a 2.2 rear. Just curious what you all are running for tire pressures with tubes. I am running 40psi and seems like the front wants to wash everywhere
 

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Do a search...
Otherwise, it depends too much on weight, tyre (differs a lot between manufacturers), riding style etc to bother comparing.
Mess around with your setup and find what works for you.
 

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I weigh 220 and run 30 in the front and 32 in the rear, Running 2.35 nevegals up front and 2.1 slant six in the back. I love the combination and could probably lower the pressure but I am happy with this, don't wanna worry about flats when I am out in the middle of nowhere, even though I carry a patch kit and pump with me.
 

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Your killing my Strava
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Discussion Starter · #4 ·
I am 165 without gear...I am running specialized tires...I am not worried about flats. I am worried about sucking wind on the uphills
 

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what specialized tires? what kind of terrain?

regardless of that you should still be able to safely run 30psi front and rear. i would rather have better traction at speeds when descending and work a little harder on the climbs. besides it will only make your engine stronger.
 

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.

If you asked me 18 months ago when I was 208 lbs, my answer would have been very different--35-40 PSI front, 40-45 PSI rear.
right now my weight is at about 208 riding an enduro in so cal's soft over hard pack conditions with a Butcher control up front and a Purgatory control in the rear and i like about 32psi front and rear.

these suggestions are gonna get you closer to a good tire pressure, but ultimately you will have to do some experimenting.
try the 30 psi f/r. if its too soft for you climbing bump it up, if the front is still washing out try going even lower up front. if you pinch flat you know you went too low.
 

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Your killing my Strava
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Discussion Starter · #8 ·
Ok for my front tire it is a 2.3 Specialized Clutch Control,
rear tire 2.2 Purgatory Control,
As far as terrain I will do everything, loose fire road down hills, smooth flowy single track and rocky climbs
 

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Helmetless Crasher
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Depends on what you want the tire to do and where. For wet soft loose rocky/rooty tech climbs less rear pressure is better. For long hard-pack fireroad climbs more pressure is better. But for large gravel, I find lower pressure to be advantageous as the tire is able to conform to the surface and grip/roll better.

Gotta play around with it
 

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Just for reference:

I'm 175 with gear and run tubeless on a 5" travel bike.
Front: 2.4 Mutano @ 25psi
Rear: 2.3 Weirwolf @ 28psi

The Mutano on the front will slip around if the pressure gets over 30psi. The rear seems to ride smoother at lower pressure, but will grip well even at high pressures.
 

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The ride quality must be horrible at 40psi. I am also 165lb dry. I run 30psi +/-2psi with 2.3-2.4 tires regardless of make or model. I always run on the low side of 30psi unless I expect sharp rocks and high speeds. 40psi seems way too much no matter your weight or tire. I figure if I never pinch flat then I'm running too much air. If I flat more than 3-4 times a year, then I need a little more air.
 

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Tyres and PSI

I'm fairly new to all the technical applications of tyres, size, and psi. Used to be I didn't give any of those things a second thought. Now that I'm getting into mtn biking more, this is what I can add:

I am 170lbs soaking wet.
Front: 2.4 Maxxis Ardent (25-30 PSI)
Rear: 2.35 Maxxis Minion DHR (30 PSI)

During the summer and dry riding conditions, I'll run slightly smaller tyres at about the same PSI.

Front: 2.25 Maxxis Ardent
Rear: 2.10 Maxxis Ignitor
 

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The simple answer is that I basically reduce the pressure everyride until I get pinch flats and then I increase it until I don't. The pressure is different for different tires, and terrain.
 

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I weigh 150 and run about 18 - 21psi front and rear with Bontrager XR4 2.35" tires setup tubeless. It's been pretty solid without any noticeable tire squirm except once when I landed on a bank which cause the front tire to roll and loose some air. With tubes I've never gone below 25psi, but with tires this big I wouldn't go over 30psi either. On my XC bike with tires setup tubeless on Stans rims I run between 18 - 24 psi depending on the tire.
 

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I am 165 without gear...I am running specialized tires...I am not worried about flats. I am worried about sucking wind on the uphills
What has this got to do with sucking wind on the uphills? Higher pressure is not faster when riding off-road.

Keep lowering the pressure until you either pinch flat or the tire feels squirmy. Just above that is the optimum pressure.

At 165 lbs on 2.2 and 2.3 tires, I would start at 28 front, 32 rear, and start lowering it front there.
 

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Stumpy fsr carbon EVO, control casings, 2.3 butcher front & 2.2 purgatory rear, tubeless, 175lbs

Been riding on Specialized tires for about a year now and have settled on these pressures.
24-25psi front and 28-29psi rear... i have tried running higher pressures but to be honest i really feel like traction suffered.
 
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