sam_white Diamond Back Fan Jul 20, 2022 #11 X221s are pretty tough. Had 3 sets of them, they're a combo twin channel & box section design. Can be a little tight to get tyres on and off, mostly used them on the commuter bike though, so always run with narrow slicks.
X221s are pretty tough. Had 3 sets of them, they're a combo twin channel & box section design. Can be a little tight to get tyres on and off, mostly used them on the commuter bike though, so always run with narrow slicks.
