Notices
Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

Tire pressure and size

Old 04-25-13, 12:37 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Mar 2013
Location: Hampton, IA
Posts: 118

Bikes: Actionbent Roadrunner high racer, Redline d660 29er and a Quintana Roo Kilo

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Tire pressure and size

Last week I was reading and found a conversation where someone had listed tire pressures and tire size formulas to figure out max weights for tires and pressures. I was going to bookmark it then but the computer did a hiccup and after rebooting I have been unable to find it again. I'm sure that I'm not the only one that thought of bookmarking that page, could someone point me in the right direction please?

Thank you
Dan
DanWho is offline  
Old 04-25-13, 12:43 AM
  #2  
got the climbing bug
 
jsigone's Avatar
 
Join Date: Jan 2005
Location: San Diego
Posts: 10,212

Bikes: one for everything

Mentioned: 82 Post(s)
Tagged: 0 Thread(s)
Quoted: 635 Post(s)
Liked 924 Times in 280 Posts
page might be in your browser history if it was recent
__________________
Rule #10 // It never gets easier, you just go faster.
jsigone is offline  
Old 04-25-13, 02:54 AM
  #3  
just pedal
 
donalson's Avatar
 
Join Date: Aug 2008
Location: Houston, TX
Posts: 980

Bikes: Surly Disc Trucker, trek 560

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Liked 1 Time in 1 Post
about 1/2 way down in this page it has a chart like you talk about... but only goes to about 150lbs for rider weight :-/
https://janheine.wordpress.com/2010/1...-and-pressure/
donalson is offline  
Old 04-25-13, 02:56 AM
  #4  
just pedal
 
donalson's Avatar
 
Join Date: Aug 2008
Location: Houston, TX
Posts: 980

Bikes: Surly Disc Trucker, trek 560

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Liked 1 Time in 1 Post
and heres one even better
https://www.bccclub.org/documents/Tireinflation.pdf
donalson is offline  
Old 04-25-13, 05:54 AM
  #5  
The Recumbent Quant
 
cplager's Avatar
 
Join Date: Jan 2012
Location: Fairfield, CT
Posts: 3,094

Bikes: 2012 Cruzbike Sofrider, 2013 Cruzigami Mantis, 2016 Folding CruziTandem

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 28 Post(s)
Liked 8 Times in 6 Posts
This Bicycle Quarterly article is what I usually see quoted here (and can be found on Sheldon's pages).
cplager is offline  
Old 04-25-13, 10:32 AM
  #6  
Señor Member
 
Wilfred Laurier's Avatar
 
Join Date: Feb 2013
Posts: 5,066
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 649 Post(s)
Liked 293 Times in 216 Posts
Originally Posted by donalson
about 1/2 way down in this page it has a chart like you talk about... but only goes to about 150lbs for rider weight :-/
https://janheine.wordpress.com/2010/1...-and-pressure/
It's not 150 lbs rider weight, it is 150 lbs wheel load. Unlesss you are riding a unicycle (and, hey, that's cool, I don't judge) then wheel load and rider weight are !=.

From the paragraph before the graph in the article: "Note that the loads are given per wheel, not for the entire bike. For most bikes, you can assume between 40% and 45% on the front wheel, and 55% to 60% on the rear."
Wilfred Laurier is offline  
Old 04-25-13, 11:19 AM
  #7  
Senior Member
Thread Starter
 
Join Date: Mar 2013
Location: Hampton, IA
Posts: 118

Bikes: Actionbent Roadrunner high racer, Redline d660 29er and a Quintana Roo Kilo

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The articles are all pretty good, but the one I was reading gave formulas to work with so that you could tell the max weight the tire would take and the pressure needed for the combination of ride, rolling resistance and traction. I checked my page history, because of the crash it didn't save the last page I visited. Oh well, if nothing else I will just continue rereading everything over.
DanWho is offline  
Old 04-25-13, 12:32 PM
  #8  
just pedal
 
donalson's Avatar
 
Join Date: Aug 2008
Location: Houston, TX
Posts: 980

Bikes: Surly Disc Trucker, trek 560

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Liked 1 Time in 1 Post
Originally Posted by Wilfred Laurier
It's not 150 lbs rider weight, it is 150 lbs wheel load. Unlesss you are riding a unicycle (and, hey, that's cool, I don't judge) then wheel load and rider weight are !=.

From the paragraph before the graph in the article: "Note that the loads are given per wheel, not for the entire bike. For most bikes, you can assume between 40% and 45% on the front wheel, and 55% to 60% on the rear."
thanks for pointing that out... It's been a few years since I've read over that stuff and I just glanced over it this time... shame this forum doesn't have a rep system lol...
donalson is offline  
Old 04-28-13, 01:01 PM
  #9  
Senior Member
 
DOOM_NX's Avatar
 
Join Date: Jun 2011
Location: Greece
Posts: 293

Bikes: None at the moment

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I still inflate both of my tires to 8.5 bar (700x25). Minimum indicated is 7.5 bar, and I don't really notice any difference in the front tire...
DOOM_NX is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wswhiting
Folding Bikes
7
11-07-16 05:22 PM
arex
Bicycle Mechanics
5
01-17-14 11:19 PM
lurch0038
Touring
21
10-20-13 06:26 AM
Mbrgr1
Recumbent
18
07-11-13 09:24 PM
eventhorizon
Hybrid Bicycles
5
06-06-10 10:59 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.