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# Wheelchair Tire Diameters

From a construction standpoint, there are no differences between Wheelchair and Bicycle Tires. There are certain optimizations for wheelchair tires (such as non-marking compounds), but **a bicycle tire could be used on a wheelchair just fine so long as it is the correct size.**

Picking out the correctly sized wheelchair tires can be difficult as a result of multiple naming conventions. It is for this reason that we always encourage the use of a tires ETRTO size during size evaluation. More on that here: [How are tires measured?](https://schwalbetires.crisp.help/en-us/article/how-are-tires-measured-iexeer/)

Specfic to to Wheelchairs, the three most common sizes are 24", 25", & 26". 
Despite their titles, __these sizes do not correlate to the rim's diameter. __ The following image shows the approximate rim diameter for each size:
![Wheelchair sizes and their respective rim diameter measurements](https://storage.crisp.chat/users/helpdesk/website/-/c/f/f/5/cff55f369977f800/wheelchair-tire-size_3c18fd.jpg)