For example, the code might read 265 45 r21, which means your tire has a width of 265 millimeters, has a height of 45 percent of its width, and fits a rim diameter of 21 (in inches).
No, you can't. It's not whether it's safe or not, it's impossible. A 22 inch tire won't stretch enough go over a 23 inch rim. Not going to happen.
What is a 21 inch tire?
A 21-inch tire's size means there's more material that makes contact with the road. More tire contact with the road can produce a tighter grip than a smaller tire may provide. A bigger tire also matters in the looks department. A 21-inch tire simply has more heft than, say, a 16-inch tire.
29er rims have an interior diameter of 622 millimetres (24.5 in) and the average 29" mountain bike tire is (in ISO notation) 59-622 corresponding to an outside diameter of about 29.15 inches (740 mm).
Are 19 or 20 inch wheels better?
19" to a 20" set up is not a very big jump. The difference is minimal. The nice thing about a 20" rim is that you will have 10x the tire choices. That means you have options with better grip, better ride and better cost.
Is it better to have 18 or 20 inch wheels?
They offer better acceleration, are lighter, and improve the ride quality. If you're buying based solely on aesthetics, opt for the 20-inch rims and ensure that your speedometer still matches the actual speed. If comfort or performance are the most important attributes to you, 18-inch wheels will be better suited.Jan 6, 2022
Do 20 inch wheels ride rough?
Do 20-inch wheels ride rough? - Quora. In one word: YES. Wider tires require less pressure and provide more rolling area offering a smoother ride, less bumpy and generally more enjoyable cycling.