303S 無內胎碟煞 FAQ

What is the overall rim specification for the Zipp 303 S Series wheelset (depth, width)?
The rim depth is 45mm, external width is 27mm, and tire bed width is 23mm.

Is the Zipp 303 S Series rim wider than the Zipp 302 rim?
Yes. The Zipp 303 S Series is externally 2mm wider, with a 7mm wider tire bed width.

Is the Zipp 303 S Series Tubeless wheelset offered in 650b?
No, the Zipp 303 S Series wheelset is offered in 700c only.

Is the Zipp 303 S Series wheelset Tubeless compatible?
Yes. The Zipp 303 S Series rim has a tubeless straight side (hookless) tire interface that requires tubeless and tubeless-ready tires.

Can you use a regular tire with tubes in Zipp 303 S Series wheels?
No – only tubeless or tubeless ready tires should be used in Zipp 303 S Series wheels. Tubes are ok, as a repair, but tires must have the stiffer tubeless specific bead. The standard tube-type tire bead interface is not meant to be used in a hookless rim profile, as they will not securely retain the tire in place without a hooked rim profile.

The new Zipp 303 S Series wheels have a tubeless profile with hookless, straight sides. Do you have a list of tires that are compatible?
No, we do not have a list. Current tubeless and tubeless ready tires are compatible with the Zipp 303 S Series wheels. Zipp is currently actively involved in discussions with ISO along with other rim and tire manufacturers as are ushing for the creation of a new norm for tubeless systems on the road, to remove all uncertainty.

What is the most aero tire size for the Zipp 303 S Series wheel?
28mm is the most aero tire size for the Zipp 303 S Series wheel.

What is the minimum tire size for Zipp 303 S Series wheel?
25mm is the minimum tire width for the Zipp 303 S Series wheel.

What is the maximum tire size recommendation/limit for the Zipp 303 S Series wheel?
Zipp suggests limiting maximum tire size to tires that are indicated as 55mm.

What is the rider weight limit for the Zipp 303 S Series wheels?
The suggested rider weight limit is the same as all other Zipp wheels, 250lb / 115kg.

What hub does the Zipp 303 S Series wheel use?
The Zipp 303 S Series wheelset uses Zipp 76/176 Disc Brake hubs, Center Lock only. The Center Lockring is included.

What is the weight of the Zipp 303 S Series wheelset?
1540g. The Zipp 303 S Series wheelset is lighter than the Zipp 302 wheelset by 155g.

Is the Zipp 303 S Series offered in rim brake and disc brake?
No, the Zipp 303 S Series is offered in disc brake only.

Are colored decals offered for the Zipp 303 S Series wheelset?
No, decals are not available separately. The graphics on the Zipp 303 S Series wheelset are not adhesive decals.

What is the maximum tire pressure for the Zipp 303 S Series wheel?
The maximum tire pressure for all Zipp hookless Tubeless compatible rims is 72.5psi (5 bar). https://axs.sram.com/tirepressureguide.

What is the recommended tire pressure to use for the Zipp 303 S Series Tubeless wheel for my riding weight in PSI?

(Rider Weight)

(labeled tire width)

(labeled tire width)
LBS/KG 28 30

99/45

49/52 45/47
110/50 50/53 46/48
121/55 51/54 47/50
132/60 52/56 48/51
143/65 53/57 49/52
154/70 55/58 50/53
165/75 56/60 51/55
176/80 57/61 52/56
187/85 58/62 53/57
198/90 59/64 54/58
209/95 60/65 55/60
220/100 61/66 56/61
231/105 62/68 57/62
242/110 63/69 58/63
253/115 64/70 59/65

*Recommendations are a starting point for riders to begin tuning their optimum tire pressure
You can find precise pressure suggestions for your rim profile, tire type, and rider weight over at https://axs.sram.com/tirepressureguide

What is the minimum tire pressure for the Zipp 303 S Series wheel?
There is no minimum tire pressure for Zipp hookless Tubeless compatible rims, however, we recommend our customers to experiment before fully committing to low tire pressure. Please refer to our tire pressure chart.

What is the warranty coverage for Zipp 303 S Series wheels?
Zipp has lifetime warranty coverage against manufacture defect, and impact damage warranty coverage during intended use that will cover all 2021 Zipp products and beyond. Lifetime warranty purchase coverage applies to the original owner for product purchased through authorized Zipp retail channels and is not transferable. Proof of purchase is required. Zipp electronic components will maintain a 2-year warranty coverage from the original purchase date. See our full warranty statement here: https://zipp.com/reg/