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DG
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Ture pressure
11/12/18 at 2:07pm
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Hello experienced guys, wanted to pick you brain in regards to winter and tyre pressure. I use tubular, i bet it should be different (lower) due to the conditions of the trail, more slippery. So what are you thoughts and experience regarding this?
  
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IntheBush
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Re: Ture pressure
Reply #1 - 11/12/18 at 2:20pm
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It depends upon durability of the tire and rider weight, but I try to keep it simple.

30 psi or there abouts seems to be happy medium for me (175 lbs.). You'll lose a few psi just taking the chuck off the valve and normal pressure loss. I can usually ride a couple o' days in a row before I need to air up again.

I've run 25 before, but the lower pressures especially on xc tires without any reinforcement increases the risks of sidewall cuts on the rocky stuff. Especially quartz, which is particularly nasty.
  
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BudLeach
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Re: Tire pressure
Reply #2 - 11/12/18 at 3:05pm
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I wouldn't necessarily say it is winter specific, but when the trails are more muddy/slick I generally drop around 1 psi in my tires. If it's real greasy, I add a little more low speed rebound damping to try and improve traction over rooty sections. I also go with a more knobby tire for the winter to bite through the leaf cover. I prefer a semi-slick in the rear for the summer.

I always over-inflate my tires a little at the house before loading the bike on the rack. Then I use a trusted pressure gauge to deflate to my desired pressure just before starting my ride. Tire pressure is too critical to not check before every ride IMO.

Now for the actual numbers...
I weigh 165-170 with Camelbak, ready to ride.
I run 27.5 x 2.3 tires (tubeless) front and rear with Maxxis EXO casings.
My rims have an internal width of 26 mm.

FWIW, I generally run 20-21.5 psi in front, and 22-23.5 in the rear (according to my gauge). I have several gauges and the readings can vary by as much as 3-4 psi depending on what gauge I use. Which is why I always use the same gauge to set my tires before a ride.
« Last Edit: 11/12/18 at 3:15pm by BudLeach »  
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49erRider
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Re: Ture pressure
Reply #3 - 11/12/18 at 3:39pm
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No long answer here: 

Rear - 26ish

Front - 23-24ish
  
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JasonK
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Re: Ture pressure
Reply #4 - 11/12/18 at 4:31pm
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For me I usually run mid to high 20s front and back but would bump it up to 30psi for fast rocky trails.  Out west I found closer to 30 was ideal but for local stuff I like to run it a little softer.
  
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Banjopickin
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Re: Ture pressure
Reply #5 - 11/12/18 at 5:15pm
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DG wrote on 11/12/18 at 2:07pm:
Hello experienced guys, wanted to pick you brain in regards to winter and tyre pressure. I use tubular, i bet it should be different (lower) due to the conditions of the trail, more slippery. So what are you thoughts and experience regarding this?


I think you mean you use Tubes.

Tubular tires are a whole different thing. If you are gluing tubulars onto your MTB than hell yeah!

I run a bit lower on cold winter rides since it seems that the rubber isnt as soft. But i only fluctuate maybe a few PSI or less between summer/winter.

Its really what feels good. I change PSI way more to manage trail conditions than I do for temperature. Mellow Dupont rides I go pretty low. Charging Pisgah days I run higher.

  
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Advocat wrote on 08/22/13 at 5:16pm:
...packin some Chub in the back of the pick-up.


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49erRider
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Re: Ture pressure
Reply #6 - 11/12/18 at 5:55pm
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Banjopickin wrote on 11/12/18 at 5:15pm:


I think you mean you use Tubes.

Tubular tires are a whole different thing. If you are gluing tubulars onto your MTB than hell yeah!

I run a bit lower on cold winter rides since it seems that the rubber isnt as soft. But i only fluctuate maybe a few PSI or less between summer/winter.

Its really what feels good. I change PSI way more to manage trail conditions than I do for temperature. Mellow Dupont rides I go pretty low. Charging Pisgah days I run higher.




Yeah Yeah, rub it in that your typical rides are Dupont and Pisgah.
  
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Banjopickin
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Re: Ture pressure
Reply #7 - 11/12/18 at 6:02pm
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49erRider wrote on 11/12/18 at 5:55pm:



Yeah Yeah, rub it in that your typical rides are Dupont and Pisgah.


Man I know it sounds crazy but I wold KILL to have a Sherman's Branch, WWC, or Renny close by. Hauling ass through flat, twisty, tight, woodsy singletrack is just as much fun as Black Mtn, Bennet, Burnt Mtn. etc.


When I come home my first stop is Beatty for a hot lap... Cool

  
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Advocat wrote on 08/22/13 at 5:16pm:
...packin some Chub in the back of the pick-up.


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DG
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Re: Ture pressure
Reply #8 - 11/12/18 at 6:24pm
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Banjopickin wrote on 11/12/18 at 5:15pm:


I think you mean you use Tubes.

Tubular tires are a whole different thing. If you are gluing tubulars onto your MTB than hell yeah!

I run a bit lower on cold winter rides since it seems that the rubber isnt as soft. But i only fluctuate maybe a few PSI or less between summer/winter.

Its really what feels good. I change PSI way more to manage trail conditions than I do for temperature. Mellow Dupont rides I go pretty low. Charging Pisgah days I run higher.


Yes tubes sorry, not road tubular
  
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DG
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Re: Ture pressure
Reply #9 - 11/12/18 at 7:22pm
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Here is another question. In the Charlotte area do you change the Tyre with a winter compound and tread (i think that one of you already replied yes) or no? 
  
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IntheBush
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Re: Ture pressure
Reply #10 - 11/12/18 at 11:14pm
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DG wrote on 11/12/18 at 7:22pm:
Here is another question. In the Charlotte area do you change the Tyre with a winter compound and tread (i think that one of you already replied yes) or no? 


Winter compound.. What's that..  
Is that some sort of magic sticky rubber for 6" of mud? Smiley

I don't. But it aint a bad idea, if you don't like being obsessed with the weather. Or if you're going out on location.

I tend to ride the same tires year round locally (slick, fast xc tires), because changing tubeless tires is a hassle. And I'm a high speed, low drag kind of guy.. 
They don't like greasy conditions and low pressures one bit. So I try to keep 'em in the dry as much as possible.

  
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