Due to the wide tire bed of the 303 XPLR S wheels, we see the following tire growth:
For tires sized 40-46mm, tires will grow ~3.6mm
For tires sized 47-60mm, tires will grow ~2.8mm
Please consider this tire growth when selecting tires for your frame.
Only approved tires from the Zipp Compatibility Chart can be used with your 303 XPLR S wheels.