Roval CLX 40 Disc wheels review

Specialized’s next-gen carbon disc wheels

Our rating 
5.0 out of 5 star rating 5.0
GBP £1,400.00 RRP | AUD $2,699.00 | USD $1,900.00
Roval CLX 40 Disc: squaring up to Zipp's 303s

Our review

We don’t think you’ll find better for the money – Roval really has taken the fight to Zipp’s 303s
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Up until now the choice for quality disc brake-compatible wheels was limited to Zipp’s 303s or tubular-only sets. Specialized’s Roval brand hopes to change that.

  • Highs: Light, stiff and well put together
  • Lows: Can be affected by high crosswinds

Its new CLX 40 wheels are significantly cheaper than the Zipps and – at 1492g – 186g lighter too. The Roval’s external width is 23mm, the internal width 16.2mm – compared with the standard 13.5mm – so they’re suited to 23-25mm rubber. The wider-than-usual rim means the tyre profile is smoother, enhancing grip and comfort. The wheels use Shimano’s Center Lock system, so if your bike has six-bolt rotors you’ll need new ones.

Roval hasn’t cut corners to hit that price. DT Revolution butted spokes are mated to a front hub with alloy flanges and a carbon body, and the all-alloy rear features internals from DT Swiss’s highly regarded 240 hub. Both run on top quality Ceramic Speed bearings. Build quality is good, too, the hubs staying smooth during testing, while rider weight limit is a generous 108kg (17st).

The ride is impressive. The 40mm carbon aero rims feel sturdy and free of flex, helped by sensible spoke counts – 24 front, 28 rear, both 2-cross. Disc braking can mean a higher potential for spokes to wind up (the rim rotates more under braking than the hub, as the braking is further from the wheel’s axis) so a strong spoking pattern makes sense. You do get feedback and a little interference through the steering when the rims are buffeted. This is better than most we’ve tested, though still can’t quite match the 303s.


Roval has created an excellent set of handbuilt wheels here. They’re designed to achieve an aero advantage, the construction quality is excellent and they’re sensibly engineered.

Product Specifications


Name CLX 40 Disc (14)
Brand Roval

Rims Brand Roval
Weight (g) 1492
Spokes Brand DT Swiss Revolution
Spokes Lacing Crossed 2
Front Hub Brand DT Swiss
Front Spoke Count 24
Rear Hub Brand DT Swiss
Rear Spoke Count 28
Rim Size/Diameter 40