Head to head
Black Inc Forty FivevsReserve 40|44
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 FiveReserve 40|44
- Depth
- 1 mm apart
- 45 vs 44 mm
- External
- 2 mm apart
- 30 vs 32 mm
- Internal
- 3 mm apart
- 22.5 vs 25.5 mm
- Claimed weight
- 23 g apart
- 1,385 vs 1,408 g
- UK RRP
- £300 apart
- £2,000 vs £1,700
Rim depth
45 mm
40 / 44 mm
3 mm apart. Deeper is faster on the flat; shallower is calmer in crosswind and lighter uphill. Neither is simply better.
Internal width
22.5 mm
25.5 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
32 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
Reserve
40|44
RRP £1,700
UCI mass-start road
Eligible — Eligible on the rules we assess