Head to head
Enve Foundation 45vsZipp 303 S
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
Enve Foundation 45Zipp 303 S
- Depth
- Identical
- 45 vs 45 mm
- External
- 5 mm apart
- 32 vs 27 mm
- Internal
- 2 mm apart
- 25 vs 23 mm
- Claimed weight
- 51 g apart
- 1,591 vs 1,540 g
- UK RRP
- £400 apart
- £1,400 vs £1,000
Rim depth
45 mm
45 mm
Effectively the same depth — this is not the axis to choose on.
Internal width
25 mm
23 mm
The wider rim is built around a wider tyre. Match this to the tyre you actually run, not to the bigger number.
External width
32 mm
27 mm
Governs how the rim and tyre meet the air, and frame clearance.
Enve
Foundation 45
RRP £1,400
UCI mass-start road
Eligible — Eligible on the rules we assess
Zipp
303 S
RRP £1,000
UCI mass-start road
Eligible — Eligible on rim height; tyre choice is restricted