The Annual Tour Sale—New Deals Added Daily »

Gear Question

How can I tell if I need the 48mm or the...

How can I tell if I need the 48mm or the 60mm?

Responded on

It depends on how deep your wheel's rims are. If they are those "Deep V's" or aerodynamic racing rims, you might need the extra length of the 60mm stem length to be able to have enough stem length poking out inside the wheel to pump up your tire.

Responded on

By way of reference, 60mm valves work comfortably in Zipp 303's, 52mm is about the bottom limit (Dx from ID to outer edge of braking surface ~40mm). For my Velocity rims (Dx ~30mm), the 48mm worked well. Hope this helps.

By way of reference, 60mm valves work comfortably in Zipp 303's, 52mm is about the bottom limit (Dx from ID to outer edge of braking surface ~40mm).  For my Velocity rims (Dx ~30mm), the 48mm worked well.  Hope this helps.