LeftieBiker wrote: ↑
Thu May 28, 2020 7:41 pm
either they sold me a 27" wheel in a 26" box, or the Schwalbe 26" tire is a very small 26" (despite being what is on the bike now) while the rim is a very large 26". In any case I can't get the damned tire on the wheel...
Certain rim/tire combinations can be a real pain to mount but be sure you have the right tire for the rim. There are lots of different terms used to describe tire size but the least ambiguous is the ISO number.
For 26" (mtn bike tires) the ISO size is 559.
There were also 26" tires used on old Schwinns (weird, Schwinn-specific sizes) and old English 3-speeds (650A) = ISO 590.
There is also 650B aka 27.5 tires/wheels that are ISO 584.
Some triathalon bikes use 650C which is ISO 571.
Normal road bike tires (700C) are ISO 622.
27" rims/tires (USA market only) are ISO 630.
The ISO size of often printed on the tire sidewall. The only ones that are easy to confuse are 700C and 27". Any other tires will be WAY off in size and they won't even be close to fitting. If the tire is a '26" tire' and it almost fits, it is probably the right size and you are just dealing with a tolerance issue on the tightness of the fit. You can use tire irons to get the tire onto the rim but do be careful to not pinch the tube. Also, different styles of rim tape can make a difference. You might try to put the tire on with no tube first. If it goes on that way, it's the right size and it might stretch a bit over the course of a few days making subsequent mountings easier.