I just tried to install my new Bell comfort bike 26" tire. I think it is sized incorrectly. It is like I am trying to install a 24" tire on a 26" rim. When I compare it to the old tire it is definetly smaller. Has anyone else experienced this?

Try this: http://www.livestrong.com/article/189600-bell-bike-computer-instructions/

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

https://bugtingpreltab.files.wordpress.com/2015/10/bell-f12-bike-computer-manual.pdf

If you need further help, reach me via phone at https://www.6ya.com/expert/cynthia_0eebb7da17b33b5e

the tire size is molded into the side wall of the tire. It will look something like: 26 x 2.125 or 700 x 35c
If the bike does not get a lot of use, you will notice after a few weeks that the tires are soft, this is because butyl rubber tire seep air, just like you car tires do over time. You may have picked up thorn or multiple thorns or glass and this could be imbedded in the tire. The tubes manufacturers spec on new bikes are notoriously thin and very prone to flats. Try replacing your tubes with Thorn Resistant tubes or tubes that have tire sealant in them like Slime Tubes (brand name). Remember to rub your fingers on the inside of the tire before installing a new tube to make sure you have removed the offending thorn, or else you are going to have another flat, sure as shootin'.

Read the tire size on the sidewall of the tire and buy a tube that is the same size. Most of them are 26x1.75-2.00, but it could be 24 or even 29 depending on the size of the bike.

You can not fill a presta valve at a gas station because the valve is too small for the hose. The hose at a gas station is made to fit a schrader valve.

here just check out this video:

http://www.youtube.com/watch?v=9byRp9e2USU&feature=related

hope this helps.

There are lots of different wheel sizes on bikes today (20", 24", 26", 700c, etc.), and lot of different tire widths for all those different wheel sizes. Fortunately, tires are marked with their size, so you just need to learn how to read those markings, and they are not complicated.

For the purpose of picking a replacement tube, there are just two numbers you need to know: tire diameter and tire width. These numbers are always written somewhere on the side of each tire. (Sometimes when tires get old the numbers are hard to see. Don't give up, just keep looking.) Here are some examples of what the numbers might say: 26×1.95, 700c x 25. Sometimes the there will be three numbers, something like this: 26×1-1/2×1-3/4. Don't worry about that, just remember the first number (26 in this example), and the larger of the other numbers (1-3/4 in this case). Sometimes there will be letters with the size (such as EA3 or S-6). Sometimes there will be another number or two in parentheses, for example (622) or (559-45). Don't worry about those letters and numbers. They are important for getting a replacement tire that fits, but not important for replacing the tube.

The numbers can be hard to remember. It's a good strategy to write them down somewhere to bring with you.

Some of this will depend mostly on what type of bike youre talkin' about here. Some cruiser/comfort type bikes will have the exact same rim size as nearly all mtn bikes and will swap with no problem but a 26 and 700 size wheel is NOT the same and there is NO compatibility between tires or frame of the bike including the fork. On a standard 26x2.1 size mtn tire the smallest you could go to is a 26x 1.50 that will fit on that wheel. if you have a French 26x1 3/8 size (S6) tire then the answer is the same....NOT compatible with anything 26" whatsoever. You cannot change the wheels either depending on the frame/fork you have. All you need to do is change the tires and keep the wheels! Any hardtail mtn bike will work fine as a commuter bike if you change the tires to a thinner and smoother tire for less rolling resistance.

Always have the right size for the child to ride. It is very dangerous to give them a bike too big, you do not buy big shoes so do not try to save money that way. The seat height is gauged by the leg length, he should be able to get off easily, handlebars are according to personal preference and comfort. We sell 5000+ bicycles a year at our bike store and we size them to the person, do you know there are 24 different frame sizes in a 26" bike? Huffy makes one size in the ladies bike, it is a 19" frame, kind of a one size fits all, it does not work that way, not all size 10 clothes are the same length same with bikes. I say buy the child the right size and do not risk injury or death with the wrong size. Also, a helmet is a must, you don't recover from a brain injury. Remember, a broken arm mends, brains don't.

DansComp.com Has BMx Parts And
http://www.bikeparts.com/ Has Moutian bike parts 26 x 1 3/8 might fit

here are the wheel value for a Bell F20

Road Bike
20" 1596
22 1759
24 1916
26 2073
27 2124

Montain Bike
24" 1888
26 2045
27 2155
28 2237

I hope this helps set your F20 computer.