Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

What is the minimum tire size I can use with this wheel?

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

What is the minimum tire size I can use with this wheel?

Old 09-23-08, 04:44 AM
  #1  
wickedcold
Senior Member
Thread Starter
 
wickedcold's Avatar
 
Join Date: Jul 2008
Posts: 153
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
What is the minimum tire size I can use with this wheel?

I've got a Trek 7200 which has Matrix 750 wheels with 700C x 35 tires. Thanks for any help!
wickedcold is offline  
Old 09-23-08, 11:12 AM
  #2  
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Posts: 6,926

Bikes: 03 Raleigh Professional (steel)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Measure inner width of rim. Look up width on Sheldon Brown's tire width chart.
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline  
Old 09-24-08, 04:31 PM
  #3  
dobber
Perineal Pressurized
 
dobber's Avatar
 
Join Date: Oct 2003
Location: In Ebritated
Posts: 6,555
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
28 mm according to the search function
__________________
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
dobber is offline  
Old 09-24-08, 05:08 PM
  #4  
wickedcold
Senior Member
Thread Starter
 
wickedcold's Avatar
 
Join Date: Jul 2008
Posts: 153
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by dobber View Post
28 mm according to the search function
Thanks! What search terms did you use? I couldn't find it when I tried.
wickedcold is offline  
Old 09-24-08, 05:12 PM
  #5  
Wanderer
aka Phil Jungels
 
Wanderer's Avatar
 
Join Date: Apr 2005
Location: North Aurora, IL
Posts: 8,000

Bikes: 08 Specialized Crosstrail Sport, 05 Sirrus Comp

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 139 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The inner width should be labelled on the rim. 700x23, or something similar. Then go to Sheldon's site.....
Wanderer is offline  
Old 09-24-08, 05:37 PM
  #6  
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Posts: 28,321

Bikes: 1987 Bianchi Campione

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by wickedcold View Post
I've got a Trek 7200 which has Matrix 750 wheels with 700C x 35 tires. Thanks for any help!
28 sounds about right. Since all tires measure differnetly than what's printed, ultimately it's what the tire does when it's actually on the rim that counts.

In which case the tire cannot be narrower than the rim when inflated.
operator is offline  
Old 09-24-08, 05:57 PM
  #7  
jim6b
Senior Member
 
Join Date: May 2008
Location: Texas
Posts: 190

Bikes: Giant OCR 3, Bontrager, Trek 1500

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by operator View Post
28 sounds about right. Since all tires measure differnetly than what's printed, ultimately it's what the tire does when it's actually on the rim that counts.

In which case the tire cannot be narrower than the rim when inflated.
Not necessarily true. The same tire measured on different rim widths will have different mounted diameters. When I read Sheldon, he missed this point. The manufacturer can be measuring the tire on a different sized rim. For example a tire measured on a 15c rim will be different than when measured on a 19c.

OP should go to Schwalbe's tech pages for a better discussion of tire rim matching.
http://www.schwalbetires.com/tech_info/tire_dimensions
jim6b is offline  
Old 09-24-08, 10:45 PM
  #8  
Jeff Wills
Insane Bicycle Mechanic
 
Jeff Wills's Avatar
 
Join Date: Mar 2008
Location: other Vancouver
Posts: 8,942
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 418 Post(s)
Liked 15 Times in 11 Posts
Originally Posted by jim6b View Post
Not necessarily true. The same tire measured on different rim widths will have different mounted diameters. When I read Sheldon, he missed this point. The manufacturer can be measuring the tire on a different sized rim. For example a tire measured on a 15c rim will be different than when measured on a 19c.
Yes and no. The ETRTO method of defining tire width is (IIRC) the width of the casing, flattened out and measured from bead to bead, divided by 2.5. This means that a 28-622 ETRTO tire is 20% wider than a 23-622 ETRTO tire since the measurement is not dependent on the rim the tire is mounted on.
__________________
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is offline  

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


Thread Tools
Search this Thread

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.