The ultimate objective of Shimano’s wheel designs is to create faster, more durable wheels for all types of riders through a strategic balance of key factors -- aerodynamics, lightweight, rigidity, compliance, comfort, durability, price and style -- plus the Quality Control manufacturing standards that have forged the Shimano legacy.
Dura-Ace
Product
DURA-ACE WH-7900 Wheel Systems
WH-7900-C50-TU    WH-7900-C50-CL   
WH-7900-C35-TU    WH-7900-C35-CL   
WH-7900-C24-TL    WH-7900-C24-CL   
With a focus on speed, the new rim profiles yield a substantial reduction in weight while maintaining the aerodynamic shape of the rim and its race-tested advantages (less subject to crosswinds and enhanced precise steering).

A 16 spoke front wheel with an oversized 15mm aluminum axle helps counter the flex that occurs in contemporary carbon fork designs.

The 20 spoke rear wheel, centered on a lighter weight titanium freehub body creates the delicate balance - so crucial to acceleration and speed - between light weight and rigidity. The WH-7900 series make use of the most advanced rim designs and materials; super-light carbon fiber composites.
Ultegra
Product
Ultegra Wheel Sets
WH-6700   
ULTEGRA Wheel Set features lightweight 10-Speed compatible alloy axles and freehub body with 16x20 straight pull stainless steel spokes.
Road Sport
Product
Road Sport Wheel Sets
WH-RS80-C50-CL    WH-RS80-C24-CL   
WH-RS30-A    WH-RS20-A   
WH-RS10-A    WH-R500   
WH-R500-A   
The new Road Sport series integrate the best technology of the race-proven DURA-ACE wheels but at economical price points. These wheels are great for training rides and/or use at the local races.