The wheel-specific properties continue with the rim widths too, although now to a lesser extent. The front and rear both measure a 25mm internally, while externally they are 31mm and 30.5mm respectively, which once again is so that the hoops can provide the best ride qualities. What also stays the same front to rear is the 24/24 spoke layout.
The extra rim width at the front allows the tyre pressure to be run slightly lower for increased compliance at the front end of the bike they’re fitted to, while the rear is slightly more svelte to reduce rolling and aero resistance and promote efficient power transfer.
The rim profiles are derived from research by the US National Advisory Committee for Aeronautics (NACA), which has in recent times trended towards a smoother, rounder profile – eschewing the older, sharper profiles of what we can now refer to yesteryear.
Not every brand follows this trend, but Enve is certainly one that does – valuing aerodynamic stability as highly as ultimate wind-cheating performance. That said, the rear wheel does taper more to a point than the front, thanks to the fact that it doesn’t have to interact with crosswinds in the same way.
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