|
|
 |
Name: | Shimano Dura Ace 7900 Hollowtech II Double Chainset |
| |
|
Price: | £395.99
Additional Discounts And Voucher Codes:
|
|
|
|
Shimano Dura Ace 7900 Hollowtech II Double Chainset: The HollowTech II 10-speed Dura-Ace chainset offers the optimum balance of light weight and rigidity, making it the global choice for road racing's elite riders. Shimano has raised the bar to a new level of performance with the development of a hollow outer chainring, giving vast improvements in rigidity and increased weight savings. For 2009 Shimano have totally redesigned the Dura Ace FC-7900 crankset, both in looks and performance. The crank arms now flow into the rings and they have added a stealthy black finish, but this is not just for looks, the outer chainring is now hollow. This hollow design does more than shave weight, the hollow chainring and re-shaped crankarms make the FC-7900 and 7950(compact version) a full 20% stiffer than the FC-7800. Another added benefit to Shimano's hollow arms and rings are weight saving, you save a further 15g over the older model whilst also benefiting from a crisper front change due to the increased lateral ring stiffness. Another issue Shimano have thought greatly about with the new Dura Ace 7900 chainset is the reduction of mechanical drag. The chain and cassette have been redesigned to work together with a new level of performance, the teeth on the FC-7900 and FC-7950 chainrinsg have been re-profiled to deliver Shimano's most efficient chain contact. Lets face it, come race day every watt you produce counts, so why waste it? The new precise fit between chain and chainring helps to eliminate needless loss of power through transmission drag. It also has the added benefit of making your drivetrain extremely smooth and quiet. The hollow outer chainring has essentially removed outer chainring flex, hugely improving shift performance making it precise even under high load These industry leading HollowTech II cold forged hollow crank arms have been evolved to increase rigidity, reduce weight, and improve strength The teeth have been developed to work only in conjunction with the CN7900 chain for improved contact providing more efficiency and improved power transfer There is a wide range of chainring ratios and crank arm lengths available enabling customisation for all riders and racing disciplines HollowTech II integrated bottom bracket design uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency Bottom bracket seal design has a minimal bearing interface gives superbly smooth rolling and increased durability Weight including bottom bracket 725 grams |
Similar Products
|
Welcome
Your Last Searches
