Head to head
Vision Metron 45 SLvsZipp 404 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
Vision Metron 45 SLZipp 404 Firecrest
- Depth
- 13 mm apart
- 45 vs 58 mm
- External
- 1 mm apart
- 28.5 vs 27.5 mm
- Internal
- 2 mm apart
- 21 vs 23 mm
- Claimed weight
- 3 g apart
- 1,519 vs 1,516 g
- UK RRP
- £400 apart
- £1,600 vs £2,000
Rim depth
45 mm
58 mm
13 mm apart. Deeper is faster on the flat; shallower is calmer in crosswind and lighter uphill. Neither is simply better.
Internal width
21 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
28.5 mm
27.5 mm
Governs how the rim and tyre meet the air, and frame clearance.
Vision
Metron 45 SL
RRP £1,600
UCI mass-start road
Eligible — Eligible on the rules we assess
Zipp
404 Firecrest
RRP £2,000
UCI mass-start road
Eligible — Eligible on rim height; tyre choice is restricted