Tire Pressure- Mtbr.com
Results 1 to 7 of 7

Thread: Tire Pressure

  1. #1
    mtbr member
    Reputation:
    Join Date
    Jul 2004
    Posts
    72

    Tire Pressure

    I have tube tires. Do a lot of small drops (3-4 ft) to level concrete. Thrash down some pretty nasty rock fields. Will be going to Moab in a week or so, then Downhilling at Northstar. What is a good tire pressure to use without flats? Would it be different in Moab than at Northstar? I've heard maybe 25-35 psi. Would pressure differ in front or rear?

  2. #2
    Riding dirt since 1970
    Reputation: lifer's Avatar
    Join Date
    Feb 2004
    Posts
    584

    Depends...

    ...on your weight, which tire, ect. Even the rim width can make a difference. You could contact your tire maker with your weight and they'll suggest a starting point. I run +5lbs in the rear for XC. Pressure in Moab is not as critical, as it's hard not to get traction on that sandstone-it's like 60 grit sandpaper and eats tires (bring some old spares for slickrock). There's a lot of granite in the Tahoe area, but it's mainly nice loamy dirt-large volume DH type tires rule @North*. That place is a blast-can't wait to go back -lucky you
    Med. V10.5 for sale

  3. #3
    mtbr member
    Reputation:
    Join Date
    Jul 2004
    Posts
    72
    Quote Originally Posted by lifer
    ...on your weight, which tire, ect. Even the rim width can make a difference. You could contact your tire maker with your weight and they'll suggest a starting point. I run +5lbs in the rear for XC. Pressure in Moab is not as critical, as it's hard not to get traction on that sandstone-it's like 60 grit sandpaper and eats tires (bring some old spares for slickrock). There's a lot of granite in the Tahoe area, but it's mainly nice loamy dirt-large volume DH type tires rule @North*. That place is a blast-can't wait to go back -lucky you
    5lbs sounds pretty low from any kind of hits. You're right about Tahoe. It's fun. I'm going to Moab, then hitting Oregon (McKenzie), then downiville before I Northstar opens. Also, I've never been down Mr. toad. Thought I might give that one a spin. Moab should be cool, though. Have you been down Porcupine?

  4. #4
    Disco-Superfly
    Reputation: Jake_HT's Avatar
    Join Date
    Aug 2004
    Posts
    4,850
    I use 50+ psi wherever Im riding. front and back
    Jake
    Yeti 303 WC 25th

    Quote Originally Posted by Dwight Moody
    Didn't you read the sticker on that shock? It said not to do whatever you did.

  5. #5
    mtbr member
    Reputation:
    Join Date
    Feb 2004
    Posts
    605
    also depends how big your tires are, smaller tires need a bit more air in my experience i have 4 diff tires i use with my banshee a 2.8/2.7 combo, and a 2.35/2.35 i run the big tires 10-20 pounds with no problems * below recommended obviously* but the 2.35's need around 30 otherwise they flat steadily when in whistler and such.

  6. #6
    mtbr member
    Reputation:
    Join Date
    Jul 2004
    Posts
    72
    Quote Originally Posted by AKRida
    also depends how big your tires are, smaller tires need a bit more air in my experience i have 4 diff tires i use with my banshee a 2.8/2.7 combo, and a 2.35/2.35 i run the big tires 10-20 pounds with no problems * below recommended obviously* but the 2.35's need around 30 otherwise they flat steadily when in whistler and such.
    Ok, that sounds about right. Maybe 25 lbs on my 2.5 (rear) and 30 lbs on the front (2.3).

    I have another question though, about how you measure drops: Is there a difference between a drop and a jump? So for instance, I have a jump I practice on 20 or 30 times a day. The actual vertical drop is maybe 5 or 6 feet, but the jump required to clear the last couple of stairs is more like 20 feet. When you talk "drops" are you only talking the vertical component, or are you talking "sail" time. Seems like it would be only the vertical component...but then I wonder how the big jumps done by guys like Garcia are measured. I'll bet it's from take-off to landing, which could be a bit more than the actual vertical component. Any thoughts?

  7. #7
    jibber of the unjibbable
    Reputation: Cooter.'s Avatar
    Join Date
    Apr 2004
    Posts
    662
    pump the mother funker up where it's nice and tight, you know, like you could bounce a quarter off it's ass and leave it

    oh, but I run 27.5734 bar in my tires
    Boogie down to free James Brown

Similar Threads

  1. need help on tire pressure
    By BIKE_KID in forum Riding Passion
    Replies: 3
    Last Post: 11-20-2004, 10:40 AM
  2. help on mtb tire pressure
    By BIKE_KID in forum Wheels and Tires
    Replies: 2
    Last Post: 11-20-2004, 02:04 AM
  3. How come I can't ride with higher tire pressure
    By coolatt in forum General Discussion
    Replies: 3
    Last Post: 06-19-2004, 06:08 PM
  4. thirnner tire-more air?
    By ARITAO_BIKER in forum Beginner's Corner
    Replies: 2
    Last Post: 02-24-2004, 11:46 AM
  5. Front tire, rigid fork, about 2.3 & tire pressure?
    By winstonc in forum Singlespeed
    Replies: 13
    Last Post: 02-03-2004, 08:43 PM

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.