Head to head
Fulcrum Speed 42vsReserve 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
Fulcrum Speed 42Reserve 40|44
- Depth
- 2 mm apart
- 42 vs 44 mm
- External
- 5.5 mm apart
- 26.5 vs 32 mm
- Internal
- 6.5 mm apart
- 19 vs 25.5 mm
- Claimed weight
- 23 g apart
- 1,385 vs 1,408 g
- UK RRP
- £100 apart
- £1,800 vs £1,700
Rim depth
42 mm
40 / 44 mm
Effectively the same depth — this is not the axis to choose on.
Internal width
19 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
26.5 mm
32 mm
Governs how the rim and tyre meet the air, and frame clearance.
Fulcrum
Speed 42
RRP £1,800
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