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Product Condition The Dura-Ace 9100 C24 Carbon Laminate Road Wheelset - Clincher is in Excellent condition The Wheelset is in Excellent condition The wheelset was previously owned for approximately three weeks The following observation has been made about this item The wheelset has signs of and installed cassette light marks on the brake tracks from light use Item sold as is All warranties voidSize Unisex One SizeColor One ColorRetail Cost 114999When Shimano first released its Dura-Ace carbon laminated clincher we swore we could hear palpable sighs of relief from cycling forums group rides and tech geeks thumbing through the glossies Some were sure exercised healthy skepticism as the first round of carbon clinchers had done a good job at inspiring fear rather than confidence but as time went on it became clear that by combining the lightweight of carbon with the reliability of alloy Shimano had somehow conjured a wheel that rose above the hindrances its ancestors had faced The Dura-Ace 9100 C24 Carbon Laminated Clincher Wheelset continues the legacy its landmark predecessor established updated to modern standards and remaining every bit as strong a member of the carbon clincher category as it was when it was first introducedThe C24 may be the least changed member of the Dura-Ace 9100 line with the only change coming in the form of wider flange spacing which further increases the wheels torsional and lateral rigidity by improving the spoke bracing angle The previous C24 hubs were already relatively wide because of Shimanos angular contact bearings The bearings shape allows them to be pushed as far outboard as possible making the hub a wider platform for the spokes to stand on and making the additional width even more impressive Notably and despite the increased drive stiffness the improved spoke angle has no impact on the rims engineered radial flex which means the C24 still takes the edge off of harsh bumpsThe rims construction which is ultimately responsible for the wheelsets devoted following remains the same It involves an alloy body thats extruded and machined to thin the walls down to an almost two-dimensional 06mm wall thicknessabout half of the typical alloy rim wall thickness of 1 to 13mm This obviously reduces weight to a minimum but it also does mean the overall structure is less sound so Shimano buttresses the rim with a jealously guarded carbon laminate process The only information that the Japanese brand is willing to divulge about this process is that phosphoric acid is used to anodize the alloy and then variable carbon layers are fused to it in order to boost its structural integrity without undoing the weight gains made during the milling processThe result is a lightweight rim thats as durable and radially comfortable as alloy but still manages to approach the weight and drive stiffness of carbon Its also still got an alloy brake track and doesnt sacrifice stopping power in pursuit of weight reduction and also doesnt carry the risk of being distorted by internal pressure from the tube when it heats up during long hot descents And though the benefits of safe confident braking are obvious the long hot climbs leading into those descents are where the C24 wheels really shineThe lightweight rims mean that the wheels mass is centered at the well center not the circumference so the amount of inertial resistance youll be fighting with each revolution of the rim is decreased Shimano calls this construction philosophy the Accelerating Speed Concept we call it a wheelset spins up faster and requires less engine power to pin it and hold it It also means that on those long climbs mentioned above where inertial resistance doesnt give way to momentum after youve spun them up each wheel rotation also requires less engine power Less power means less fatigue means easier climbingThe front and rear rims asymmetrical depths continue to play to each others positioning strengths the 21mm front is slightly more stable as it combats greater exposure to crosswinds the 23mm rear is slightly more aerodynamic because its in a more sheltered positionthough of course neither rim can match the aerodynamic benefits of a mid-depth carbon rim Thats also not the C24s job and those same carbon rims can only dream of the comfort and confident braking enjoyed by the lower profile alloy rimsShimano once again incorporates 16 radial-laced spokes on the front wheel and 20 two-cross spokes in the rear The spoke holes in the rim are offset which is meant to accommodate for and counter the asymmetric force of the drivetrain For further efficiency the C24 wheelset uses ultra-stiff oversized A7075 alloy axles and a lightweight titanium freehub bodyWhy We Like The Dura-Ace 9100 C24 Carbon Laminate Road Wheelset DWGAQ96

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