EC90TT
NARROW IS FASTER. Easton’s proprietary narrow-flange R4TT front hub reduces frontal spoke area by 50% for improved aerodynamics. Combined with a new wind tunnel-tuned 90mm rim, and the new EC90TT displays lower drag than the Zipp 808 at 0, 5, 10, 15 and 20 degree yaw angles. It even rivals the much deeper (and heavier) Zipp 1080 at 5 and 15 degrees.
FASTER AND LIGHTER At 1424 a set, the EC90 TT is a full 30 grams lighter than the Zipp 808, and still 9mm deeper in rim profile, thanks to Easton’s Variable Nipple Bed (VNB™) Technology. This process of internally tapering the rim bed eliminates excess carbon between spoke holes and allows for a sharper inner edge. Less weight, improved aerodynamics with no loss in strength.
AERODYNAMICS 101: LEADING EDGE vs. TRAILING EDGE There are two ways to make a wheel fast in the wind. One is to design the leading (forward) edge to help smooth the path of the air around the tire. Zipp’s bulged rim profile attempts to do this. The other way to design a fast wheel is to focus on sharpening the rim profile on the trailing edge to manage the air as it exits the rear edge of the wheel. You can’t have it both ways. At Easton we feel that the leading edge of a bulged rim profile is a greater compromise on the trailing edge, and you can design a faster wheel with a sharper, narrower profile like the EC90. And our wind tunnel data confirms this. This goal drove us to develop VNB™, which allows for a much sharper inner edge without excess weight or compromised durability.
DIMPLES ARE FOR GOLF Dimples work on blunt objects like golf balls, but they’re irrelevant on bicycle wheels. On a golf ball, they reduce drag because they create turbulent flow. They diminish what's called pressure drag, caused by a relative "void" behind the ball. The fact that golf balls are spinning on an undefined axis is also a factor.
However on sharper, wing-shaped things like deep section wheels (or F1 cars) dimples don’t work because the air is already flowing over a narrow, optimized shape that by design reduces pressure drag. Bottom line, dimples would only make sense if your wheel was shaped like a golf ball.
UNTOUCHABLE PERFORMANCE. UNBEATABLE PRICE. WEIGHT:
1424 grams, no rider weight limit.
HUBS:
12h R4TT front, 16h R4SL rear; Custom Grade 3 ceramic bearings
RIM:
Easton 90mm carbon tubular.
SPOKES:
Sapim™ bladed black, straight pull
DETAILS:
SwissStop pads included
MSRP:
1799 euro
CONTACT:
Veltec Benelux info@veltec.com; +31 (0) 40 2013030
EC90SL CARBON CLINCHER
THE BEST BRAKING PERFORMANCE IN A CARBON WHEEL. PERIOD. Easton’s proprietary ThermaTec™ brake track treatment helps manage heat and provides smooth, consistent braking. This eliminates the pulsing, grabby feel found in other carbon wheels. Easton wheels with ThermaTec™ offer the performance of a carbon wheel with braking quality rivaling aluminum wheels. Our brake test rig (left) has been known to literally melt competitor’s wheels under braking forces. Sidewalls can flex up to 1mm outwards. EC90SL clinchers with ThermaTec™ were designed to survive this test. So far no other wheel has.
SUPERIOR RIM CONSTRUCTION. SUPERIOR IMPACT RESISTANCE. This is the world’s most advanced carbon clincher. The entire rim including sidewalls is molded into their final shape---no post-mold machining that would weaken the structure. In our rim impact test (left) a bare rim takes eight hits in the same spot. The height is increased after each impact. The EC90SL clincher rim was the only to emerge from our brutal impact test and still be rideable.
COMPETITIVE WEIGHT. CERAMIC BEARINGS. UNBEATABLE PRICE. WEIGHT:
1460 grams, no rider weight limit.
HUBS:
18h R4SL front, 24h R4SL rear; Custom Grade 3 ceramic bearings
RIM:
Easton 38mm carbon clincher.
SPOKES:
Sapim™ bladed black, straight pull
DETAILS:
SwissStop™ pads included
MSRP:
1799 euro
CONTACT:
Veltec Benelux
info@veltec.com; +31 (0) 40 2013030