Originally Posted by
solman
So are 700c and 29inch the same as far as tire choices are concerned?
They all share the same BSD, but appropriate tire choices will be limited to those with a reasonable match to the other key rim spec for fitting tires: the inner rim width.
That inner rim width could be, say, 13mm for narrow road tires, 19 mm for a typical hybrid bike or much wider, like say 50 mm for a 3” wide tire.
In most cases, the nominal width of the tire will be fairly close to the range of 1.5 to 2.0 times the inner rim width, but people often stray from that without issue.
Again, your friend the ETRTO has guidance on tire and rim compatibility and you can easily find that chart online.
Otto