Notices
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.

Tire Size?

Old 07-29-12, 09:16 PM
  #1  
timothy13
Newbie
Thread Starter
 
Join Date: Jul 2012
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Tire Size?

I have a mid 80s Schwinn Le Tour and the rims say 27 x 1 1/4 but the tires that are on it now look like they are thinner than my wife's bike tires which I can read the side walls that say 27 x 1 1/4. I am looking to replace the tires should I look for 27 x 1 1/4 or try and measure the width of what is on mine now. I am very new to road biking and not sure what I can and can not do. Thanks for any help!
timothy13 is offline  
Old 07-29-12, 09:35 PM
  #2  
Bill Kapaun
Really Old Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 11,720

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1008 Post(s)
Liked 227 Times in 178 Posts
Just get some 27x1-1/4 and you'll be fine.
You could even use 27x1-1/8 or 27X1" if you want a skinnier tire and can find them.

IF it's an older bike with straight wall rims, get a tire with a wire bead vs Kevlar.

Here's a source for all 3 sizes

https://www.biketiresdirect.com/searc...iewall=&cat=27

Last edited by Bill Kapaun; 07-29-12 at 09:40 PM.
Bill Kapaun is offline  
Old 07-29-12, 10:46 PM
  #3  
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 35,964

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 124 Post(s)
Tagged: 1 Thread(s)
Quoted: 4361 Post(s)
Likes: 0
Liked 15 Times in 15 Posts
The nominal size, ie. 27x 1-1/4, often is only an approximation of the actual size, and tires with the same nominal size vary through a fairly large range. Often the larger version of a supposedly narrower tire will be bigger.

The ISO designation molded into the tire near the rim line is more accurate. Your tire is probably marked 32-630, where the numbers represent the metric equivalents. The 32 is the width, and the 630 the diameter at the rim. Like with car tires, you can use a range of widths as long as the rim diameter matches, so you want a xx-630 tire. Remember that even the ISO widths are only approximations, so don't take them as Gospel.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Skipjacks
Bicycle Mechanics
9
06-03-19 09:46 AM
milesofsmiles
General Cycling Discussion
10
07-11-15 03:34 PM
teamo
Bicycle Mechanics
5
06-19-11 09:39 PM
UptownJoe60640
Commuting
3
04-18-11 07:17 PM
Jonah Pavesco
Touring
27
03-29-10 02:02 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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

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