Ingezonden

Reynold Cycling’s new 2013 Aero road line (Ben Delaney/BikeRadar)

On Tuesday, Reynolds Cycling launched a new line of carbon
clincher road wheels dubbed Aero. Bucking the trend of aero wheels going wide
at both the rim and the spoke bed, the Aero wheels taper to a fine edge.

They come in 58, 72 and 90mm rim heights. Respectively, the
wheelsets weigh 1,570g, 1,680g and 1,900g, and cost $2,775, $2,875 and $2,975.

Reynolds Cycling call the rim shape Dispersive Effect
Termination. Paul Lew, Reynolds Director of Technology and Innovation, said
this shape is very stable — one end goal of wider aero rims on the market.

“The design dramatically reduces turbulence. And because we
reduce the turbulence, we increase the predictability of steering,” Lew said.

The rims of all three are 26.2mm wide at the brake tract,
then taper to nearly flat.

“I found that we could yaw farther with a tapered edge,” Lew
said. “Plus, the efficiency of a wide leading edge to a taper far outweigh the
benefits of a blunt rear (wide spoke bed).”

The 58 and 72 rims feature a “Step Hook” design near where
the tire mounts to smooth air flow. The 90 rim does not, as air moves
differently over that longer profile, Lew said.

The Aero wheels are carbon clinchers

Reynolds use a different type of carbon fiber for each of
these six areas:

  • Rim hook bead
  • Brake track
  • Sidewall
  • Tire channel
  • Nipple bed
  • Spoke bed

“Different areas of the wheel encounter different forces
— thus the need for different fibers,” Lew said. “For example, the
outermost part of the wheel, the hook bead, faces impact stress but little tension,
whereas the spoke face has high tension but no impact stress. The varying
epoxies are selected similarly.”

 The wheels are built with custom DT Swiss hubs and DT Swiss
spokes.

As for tire selection, Lew believes that a 21c tire is
better than a 23c tire — by about two watts. “And performance drops off
significantly when you go to 25c. You could mitigate that with a wider rim, but
then that wouldn’t fit in a standard road bike set-up.”

Check back to BikeRadar soon for a report on Reynold
Cycling’s new mountain bike wheels.

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