Skip to main content

Bike Tire Tube Sizes Explained

Different types of bicycles use different sizes of wheels. In general, modern bikes use 26-inch or 700c wheels, tires and tubes, of which 700c is larger. A bike wheel can accommodate a limited range of tire and tube widths, but getting the right tube diameter is essential for avoiding flat tires and ruined tubes.

Diameters

The most common bike tires and tubes are 26-inch or 700c. 700c wheels measure approximately 29 inches in diameter with the tire installed. Other frequently seen sizes are 20-inch, 24-inch, 27-inch and 28-inch.

Historical Discrepancies

The stated diameter measurement may not match the actual diameter of the tire. For example, Sheldon Brown explains that the original 26-inch tires measured about 26 inches in diameter, but they were also 2.125 inches wide and correspondingly deeper than today's 1.5 or 1.75 tires. The 26-inch tire designation is based on the size of wheel used to fit those older tires and not necessarily the actual tire diameter. Look for the right tube size based on the tire and wheel's given measurements, not your own measurements, except when neither the tire nor the wheel indicates its size.

Widths

Widths of bike tires and tubes vary considerably. On 700c tires, widths are measured in millimeters and commonly measure 18 mm to 35 mm. On other types of tires, widths are measured in inches and range from 1 to 3 inches.

Considerations

In general, tube size is slightly flexible; for example, you may use a 26 x 1.25 tube on a 26 x 1.5-inch tire. However, do not use a tube of a different diameter than the tire and wheel except in an emergency. BikePro advises you can use tubes with widths within ¾ inch of the tire width for 26-inch wheels (used on mountain bikes and some hybrid or comfort bikes), and within 3/8 inch for road wheels like the 700c and 27-inch sizes.

Determining Size

The easiest way to determine tube size is by looking on the tube for a printed measurement. To determine the size of tube you need, look for measurements on the tire, either on a sticker or printed directly onto the outer side wall. If you have no tire, measure the circumference of the wheel in millimeters, placing your measuring tape on the bead seat. The bead seat is where the edge, or bead, of your tire rests when placed inside the rim. Refer to Sheldon Brown's Measuring Bicycle Rim Sizes charts to determine your wheel size and corresponding tube size.
Labels:

Comments

Post a Comment

https://gengwg.blogspot.com/

Popular posts from this blog

CKA Simulator Kubernetes 1.22

  https://killer.sh Pre Setup Once you've gained access to your terminal it might be wise to spend ~1 minute to setup your environment. You could set these: alias k = kubectl                         # will already be pre-configured export do = "--dry-run=client -o yaml"     # k get pod x $do export now = "--force --grace-period 0"   # k delete pod x $now Vim To make vim use 2 spaces for a tab edit ~/.vimrc to contain: set tabstop=2 set expandtab set shiftwidth=2 More setup suggestions are in the tips section .     Question 1 | Contexts Task weight: 1%   You have access to multiple clusters from your main terminal through kubectl contexts. Write all those context names into /opt/course/1/contexts . Next write a command to display the current context into /opt/course/1/context_default_kubectl.sh , the command should use kubectl . Finally write a second command doing the same thing into ...
Post a Comment
Read more

OWASP Top 10 Threats and Mitigations Exam - Single Select

Last updated 4 Aug 11 Course Title: OWASP Top 10 Threats and Mitigation Exam Questions - Single Select 1) Which of the following consequences is most likely to occur due to an injection attack? Spoofing Cross-site request forgery Denial of service   Correct Insecure direct object references 2) Your application is created using a language that does not support a clear distinction between code and data. Which vulnerability is most likely to occur in your application? Injection   Correct Insecure direct object references Failure to restrict URL access Insufficient transport layer protection 3) Which of the following scenarios is most likely to cause an injection attack? Unvalidated input is embedded in an instruction stream.   Correct Unvalidated input can be distinguished from valid instructions. A Web application does not validate a client’s access to a resource. A Web action performs an operation on behalf of the user without checkin...
2 comments
Read more