Head to head
Parcours AltavsZipp 303 Firecrest
Both sections drawn to one scale, from each maker's published geometry. The differences you can see in the drawing are the differences that exist.
vs
Fig. — rim sections, one scale
Parcours AltaZipp 303 Firecrest
- Depth
- Identical
- 40 vs 40 mm
- External
- 3 mm apart
- 33 vs 30 mm
- Internal
- Identical
- 25 vs 25 mm
- Claimed weight
- 140 g apart
- 1,490 vs 1,350 g
- UK RRP
- £701 apart
- £1,099 vs £1,800
Rim depth
40 mm
40 mm
Effectively the same depth — this is not the axis to choose on.
Internal width
25 mm
25 mm
Identical — both suit the same tyre widths.
External width
33 mm
30 mm
Governs how the rim and tyre meet the air, and frame clearance.
Parcours
Alta
RRP £1,099
UCI mass-start road
Eligible — Eligible on the rules we assess
Zipp
303 Firecrest
RRP £1,800
UCI mass-start road
Eligible — Eligible on rim height; tyre choice is restricted