Shimano

Shimano Dura Ace 7900~

Dura Ace Di2 Electronic group ~

STI shifters for road or dual shifter sets for Tri

Test ride Di2 at Cycles BiKyle today!

Dura Ace 7900 road group ~

Most important features:

	1/4 pound lighter than Dura Ace 7800
	carbon fiber brake levers
	reach adjustment of 1cm on brake levers
	Cable routing under handlebar tape
	Hollow large chainring for less weight and more stiffness
	Carbon fiber rear derailleur cage
	Rear derailleur handles new 11-28 cassette
	Very little trim needed on front derailleur
	Brake pads are 100% more efficient in wet conditions
	Brake calipers are stiffer yet modulation is increased

Ultegra 6700 ~

Ultegra, Shimano's second tier group received a full revamp in 2011. This new group takes inspiration from the technology of Dura Ace 7900. And, it shares the top line's 2-tone grey finish.

Most important new features:

	weighs 44 grams less than its predecessor, Ultegra SL
	uses the same Hollowglide (hollow chainring) technology as Dura Ace
	Front derailleur has reduced spring tension for faster and smoother shifting. The cage is lighter and more rigid.
	Rear derailleur handles wider angle of chain cross
	New STI levers have a composite blade, reach adjustment, and cable routing that runs under the bar tape
	New brake pads have 100% more power in wet conditions and 20% more in dry
	New chain has perforated plates to reduce weight plus "quick link" mounting