The picture makes it look as if Stan’s rim strip is a tube. Rest assured, it isn’t. The strip has a Presta valve stem built into it. And, since you shouldn’t be replacing rim strips, the valve has a removable core—not only good for replacing damaged valves but also for applying sealant.

Stan’s Standard size should fit most standard 24 and 26” diameter mountain bike rims that are 21.5 to 25mm wide. Can work with Mavic UST rims if you want it to, but also works with Mavic’s 223, 221, 317, 517, 519, 717 rims, and 719, Sun’s 0 XC, UFO, and Sub4, as well as DT’s 4.1, and most other non-Freeride, non-AM, non-DH rims.