Head to head
Black Inc Forty FivevsVision Metron 45 SL
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
Black Inc Forty FiveVision Metron 45 SL
- Depth
- Identical
- 45 vs 45 mm
- External
- 1.5 mm apart
- 30 vs 28.5 mm
- Internal
- 1.5 mm apart
- 22.5 vs 21 mm
- Claimed weight
- 134 g apart
- 1,385 vs 1,519 g
- UK RRP
- £400 apart
- £2,000 vs £1,600
Rim depth
45 mm
45 mm
Effectively the same depth — this is not the axis to choose on.
Internal width
22.5 mm
21 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
30 mm
28.5 mm
Governs how the rim and tyre meet the air, and frame clearance.
Black Inc
Forty Five
RRP £2,000
UCI mass-start road
Eligible — Eligible on the rules we assess
Vision
Metron 45 SL
RRP £1,600
UCI mass-start road
Eligible — Eligible on the rules we assess