Head to head
Roval Terra CLX IIvsZipp 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
Roval Terra CLX IIZipp 303 Firecrest
- Depth
- 8 mm apart
- 32 vs 40 mm
- External
- 2 mm apart
- 32 vs 30 mm
- Internal
- Identical
- 25 vs 25 mm
- Claimed weight
- 50 g apart
- 1,400 vs 1,350 g
- UK RRP
- £500 apart
- £2,300 vs £1,800
Rim depth
32 mm
40 mm
8 mm apart. Deeper is faster on the flat; shallower is calmer in crosswind and lighter uphill. Neither is simply better.
Internal width
25 mm
25 mm
Identical — both suit the same tyre widths.
External width
32 mm
30 mm
Governs how the rim and tyre meet the air, and frame clearance.
Roval
Terra CLX II
RRP £2,300
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