Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the Newton-Rider International Giveaway for a Foldable Bicycle Helmet


Size of a 700c tire
#1
Ok, so I have a friend with a road bike, and his tire blew out (the tire actually has a large gaping hole in it) along with the tube. Now we figured this might be a 26" tire so we went and bought one of those and tried it, but it was too small. So we thought it must be a 27" tire, but that tire was too big. So I went looking online and figured it must be a 700c tire which is between a 26" and a 27". The problem I'm having is that the old tube inside was a 27" x 1/4" and the old tire didn't have any markings on it to show what size it was. The same is true with the front tire and tube. So the problem I have is that I'm not 100% sure it's a 700c tire (more of a mountain bike guy myself) and I'm not sure which width I should get as there seems to be a lot of them. Any help is appreciated.

Here's pictures of his bike if they help any.
[attachment=2015]
edit: you can see where the tire eventually ripped through in this picture its on the left side of the back tire. The lighter patch that looks kind of stretched.
[attachment=2016]
  Reply
#2
a quick search on Google revealed this...
  Reply
#3
Forget the old tube. I have a hunch the correct tire is 700cm. Look at the tire for some molded lettering something like 38-622. The key is, if you find 622 then it is a 700cm tire. xx-622 is the ISO designation where 622 is the BSD for a 700cm and xx is the width. If you look for "700" molded on the tire, you won't find it.

It's confusing. two presentations, including width issues:

http://sheldonbrown.com/tire-sizing.html

http://smtp.schwalbetires.com/tech_info/tire_dimensions

This may also be a good time to check the rim tape and check for spoke problems.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
10,418
03-30-2015, 12:18 PM
Last Post: nfmisso
 
7,412
01-08-2015, 12:09 PM
Last Post: 1FJEF
 
4,926
09-20-2013, 11:09 PM
Last Post: nfmisso
 
21,545
09-30-2012, 01:53 AM
Last Post: Bill
 
17,767
07-26-2010, 11:46 PM
Last Post: nfmisso

Forum Jump:

[-]
10 Latest Posts
11-42 cogs on Road bike?
Yesterday 02:04 AM
NewBikeShopper (intro & opinion request)
Yesterday 01:57 AM
1983 Trek 720
Yesterday 12:23 AM
brakes
01-19-2021 11:25 PM
Road bike brakes upgrades
01-19-2021 01:41 PM
Do you wave to other cyclists?
01-18-2021 02:48 PM
Newton-Rider, a helmet like no other
01-15-2021 05:01 PM
Colnago R41 Handlebar
01-14-2021 10:24 PM
How much do you bike per year?
01-14-2021 04:50 PM
BMX Shoes
01-14-2021 04:42 PM

[-]
Top 5 Posters This Month
no avatar 1. Criminal
19 posts
no avatar 2. RollOn
6 posts
no avatar 3. Henry_G
5 posts
no avatar 4. Yevhen
5 posts
no avatar 5. Zviedrs
4 posts