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

Best Black Friday E-Bike Deals 2024 | Up to $1,700 in Savings

New: Take Part in the November Giveaway: Starts November 18th


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...

Forum Jump:

[-]
10 Latest Posts
Moving in Style: Beyond Regular Transpor...
Today 07:43 AM
Second wheelset for ebike.
Today 01:41 AM
Tire Sizing (Or How to Buy A Tire)
Yesterday 12:36 PM
The Roaming Radrunner Vlog 1 Why ride ...
Yesterday 09:17 AM
Recording Bike Rides
11-20-2024 01:37 AM
Ketone Ester $$$
11-19-2024 01:04 AM
Trek domane tyre
11-18-2024 01:58 PM
Old fossil buys Ebike
11-17-2024 06:39 AM
Bike bus
11-17-2024 12:14 AM
Humber "Eiffel Safety" bike 1800s
11-16-2024 03:05 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Jesper
22 posts
no avatar 2. enkei
19 posts
no avatar 3. GirishH
14 posts
no avatar 4. ReapThaWhirlwind
11 posts
no avatar 5. Flowrider
11 posts