Kevlar tires, low air psi, jumps = pinch flats ?- Mtbr.com
Results 1 to 9 of 9
  1. #1
    mtbr member
    Reputation:
    Join Date
    Jan 2004
    Posts
    8,796

    Kevlar tires, low air psi, jumps = pinch flats ?

    I am going to do some trail riding that involves quite a bit of climbing on my Bullit. Currently have 2.7 Minion DH's w/ DH tubes. Was thinking of putting on my Azonic 2.5 /2.3 Kevlar FR tires w/ med. tubes. Problem is there are quite a few drops, rocks and jumps on the way down - will running say 28 psi just invite pinch flats ? Thanx

  2. #2
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
    Join Date
    Dec 1998
    Posts
    48,236
    Run the pressure high enough so you do not pinch flat.

    In general a tire with a lower volume and/or thinner casing will require higher pressures.

    How high (or low) is that? You have to experiment. Depends on the terrain, tire, tube and your riding style.
    mtbtires.com
    The trouble with common sense is it is no longer common

  3. #3
    just along for the ride
    Reputation: Brown_Teeth's Avatar
    Join Date
    Jan 2004
    Posts
    3,033
    Keep the front tire but put a thin tube in it at 28 psi MAX if you do loads of rocks, back go 2.3 kev and run the thicker tube 34 MAX, if you can unload your compression setting before you mow the lawn you will be happy, have fun!

  4. #4
    www.ntxbmx.com
    Reputation:
    Join Date
    Jun 2005
    Posts
    366
    I destroyed a tube when trying to ride up a set of stairs at a fairly high rate of speed I was running DH tires at the time with med. weight tubes, with like 35psi. I put two fairly large punctures in the rear tube. I now don't run low pressure, and I fear goung tubeless.

    I would avoid anything below 35 pis, but I'm also over 200lbs.

  5. #5
    Elitest thrill junkie
    Reputation: Jayem's Avatar
    Join Date
    Jul 2005
    Posts
    31,527
    low air psi = pinch flats ?
    Yes..
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

    You're turning black metallic.

  6. #6
    mtbr member
    Reputation:
    Join Date
    Jan 2004
    Posts
    8,796
    Quote Originally Posted by Jayem
    Yes..

    Well I run 26 psi on my DH Minions w/o any issues - just wondering if Kevlar tires @ the same pressure will pinch flat.

  7. #7
    www.ntxbmx.com
    Reputation:
    Join Date
    Jun 2005
    Posts
    366
    Quote Originally Posted by keen
    Well I run 26 psi on my DH Minions w/o any issues - just wondering if Kevlar tires @ the same pressure will pinch flat.
    I'm running Maxxis Hard Drives - I happen to hate them by the way.

  8. #8
    www.ntxbmx.com
    Reputation:
    Join Date
    Jun 2005
    Posts
    366

    Tubless

    Re you running tubless?

  9. #9
    mtbr member
    Reputation: ianjenn's Avatar
    Join Date
    Aug 2004
    Posts
    3,183
    I weight 200lbs also and run call me old school here but the 2003 WTB MOTORAPTOR LASER dhs at 20 psi in the rear and like 23psi up front and have never pinched them using DH tubes. I have ridden TUNNEL with 19psi in the rear and 20 in the frone dings the hell out of my rims but they never flatted!!!

Members who have read this thread: 0

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

THE SITE

ABOUT MTBR

VISIT US AT

© Copyright 2019 VerticalScope Inc. All rights reserved.