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Enve 4.5 SES Tubular Carbon Road Rim

Enve 4.5 SES Tubular Carbon Road Rim
Enve 4.5 SES Tubular Carbon Road Rim
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Key Features

Material: Carbon Fibre
Rim Depth: Front 48mm / Rear 56mm
Internal Rim Width: Front 18.5mm / Rear 17mm
External Rim Width: Front 27mm / Rear 25.5mm
ERD (effective Rim Diameter): Front 563 / Rear 545
Rim Weight: Front 361 grams / Rear 399 grams
Recommended Tyre Size: 23-25mm


ENVE's SES 4.5 Carbon Road Tubular Rim meets what may be the last two reasonable demands that any sprinter/puncher/climber could make of the celebrated Utah-based manufacturer. First, a mid-depth rim that fills the gap between the climb-happy 3.4s and the cruise-missile aerodynamics of the 6.7s. Second, the inimitable road feel, low rolling resistance, reduced weight, and plush ride of tubs. The SES 4.5 Tubs' combination of aerodynamics, low weight, and tubular tires made them an inevitable addition to ENVE's line and the inevitable choice on race day.

Like the rest of the SES line, the 4.5s' rims aren't subjected to static, arbitrary NACA widths and shapes. Instead, the engineers let each rims depth requirements dictate the ideal dimensions in order to reduce lateral forces and increase aerodynamic benefits across a wide range of yaw angles. This is evident in everything from the rims rounded inner face to the position-specific dimensions for the rims, which takes the shallow, stable front and deep, aerodynamic rear rim philosophy to its logical extreme.

The result is that the 4.5 handles crosswinds and gusts with the confident stability of a rim with half its depth by building up a side-force equal to the changing angle of the wind. While this sounds like so much marketing palaver, it's verified by a Stability Index, an externally developed testing protocol borrowed from the Formula One industry. ENVE remains the only cycling manufacturer with the confidence to measure its rims by such a demanding metric. To rate a rim on this index, the front rim is subjected to quick changes in wind degree at set yaw angles, and the steering torque of user-correction is then measured. This helped ENVE dial the wheels to handle with intuitive predictability, even in gusty conditions or frequently changing wind angles.

Of course, aerodynamics and handling are absolutely meaningless if a rim crumbles at the first sign of less than optimal road conditions, so ENVE's obsessive engineering carries over into the rims' materials and layup. ENVE routes the fibres around each hole in a 100% intact design no cutting, machining, or drilling required. By continuously wrapping the fibres, ENVE adds strength, boosts rigidity, and allows for less material and a lighter rim. The use of a removable bladder also keeps weight down compared to other rims, so the SES series boasts the highest claimed strength-to-weight ratio on the market.

NB: Image for illustration purposes only

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