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Say goodbye to wind resistance.
When we look at deep-dish rims like the Reynolds Sixty Six Carbon Tubular Wheelset, we lick our chops like the big, bad wolf, a certain Mephistophelian twinkle in our eye. We think about racing on the flats and taking advantage of the seriously-reduced drag to attack early and venture out in long breakaways. Even though these wheels aren't feathery light like Reynolds' Forty Six and Thirty Two wheelsets, they're still lighter than most clincher wheels and much more aero. These may not be your first pick for climbing races. That said, in rolling races where you're big-ringing it all the time or just have one short hill where you drop it into the small ring, these Sixty Six wheels will probably be faster every second of the race. They're also great for time trials, as the weight matters even less and the aerodynamics even more.
Reynolds invested in two big upgrades on these wheels to reduce drag and improve braking. The drag is reduced thanks to the Swirl Lip Generator, and the braking is better because of the CTg brake track.
The Swirl Lip Generators are two tiny lips on either side of the narrow edge of the rim. If you didn't know better, you might think they were parting lines that weren't sanded down after the rim came out of the mold. There's no sanding forgotten, and they're hardly an accident. The SLG creates turbulence that helps the airflow reattach faster behind, ...Reynolds' Swirl Lip Generators help the wheels go faster by reducing drag, in addition to adding control in heavy crosswinds by moving the center of pressure towards the hub... after passing over the rim. They also have the effect of decreasing sideways air force on the rim, and in so doing, make your bike easier to steer in crosswinds. This means it takes less concentration and less strength to pilot the bike, which means you can devote more concentration and more strength to going fast.
The second big change is their new CTg brake track. C is for Cryo, Tg for glass transition temperature. As you know, heat build-up is not a good thing at the brake track. For tubulars, heat build-up can lead to softening of the glue holding the tire to the rim and melting brake pads. The new CTg tracks are the result of a new resin system and a new laminate structure. In regular riding conditions, it means the brake tracks operate up to 100°F cooler than the old surfaces. In other words, braking will be better, more consistent, and you'll have little to fear from braking hard on long descents.
The rest of the wheel is equally high-performance. The rims are drilled for internal spoke nipples. As the hidden aluminum nipples present less of an obstacle for the wind and the rim has smaller holes in it, it's both faster and stronger. The spokes are DT's bladed Aerolite, both front and rear. They're laced with 16 radial spokes in front and 20 cross-2 drive and radial non-drive rear. DT also makes the hubs for Reynolds. These are the 240s model -- light, strong, smooth, and durable.
All Reynolds wheel owners can buy themselves some extra peace of mind by purchasing Reynolds' two-year damage protection plan. It's called RAP, short for Reynolds Assurance Plan. The insurance means you should have little fear that a crash will ruin your wheel investment. Find out more about it on the Reynolds Cycling site.
The Reynolds Sixty Six Carbon Tubular Wheelset comes with either a Campagnolo or Shimano/SRAM compatible Freehub body and they include a full set of Reynolds' Cryo Blue brake pads in versions to match each. Reynolds recommends only these pads as they were designed with the brake tracks; use of any other brake pads is not recommended and will void the warranty. Reynolds includes their new ultra-light quick release skewers with the wheels. Also included are valve extenders and a spoke wrench.