Head to head
Cadex 50 Ultra DiscvsFulcrum Speed 42
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
Cadex 50 Ultra DiscFulcrum Speed 42
- Depth
- 8 mm apart
- 50 vs 42 mm
- External
- 3.5 mm apart
- 30 vs 26.5 mm
- Internal
- 3.3999999999999986 mm apart
- 22.4 vs 19 mm
- Claimed weight
- 36 g apart
- 1,349 vs 1,385 g
- UK RRP
- £800 apart
- £2,600 vs £1,800
Rim depth
50 mm
42 mm
8 mm apart. Deeper is faster on the flat; shallower is calmer in crosswind and lighter uphill. Neither is simply better.
Internal width
22.4 mm
19 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
26.5 mm
Governs how the rim and tyre meet the air, and frame clearance.
Cadex
50 Ultra Disc
RRP £2,600
UCI mass-start road
Eligible — Eligible on rim height; tyre choice is restricted
Fulcrum
Speed 42
RRP £1,800
UCI mass-start road
Eligible — Eligible on the rules we assess