Shimano have released details of the new mechanical Ultegra R8000 and electronic R8070 groupset which take performance cues from the higher level Dura Ace group.
Available from Chain Reaction Cycles right now, the new Shimano Ultegra range has been designed to cover all riding styles, from TT racing to sportive riding, and includes hydraulic disc brakes, a new Shadow rear mech and ergonomically shaped mechanical and Di2 shifters.
BikeRadar have produced this excellent overview of the groupset, watch it now:
The rotors feature distinctive enclosed disc fins which allow a greater surface area for heat dissipation. A pair of BR-R8070 disc calipers weigh 280g plus 212g for a pair of SM-RT800 rotors, compared to 360g for a pair of Ultegra BR-R8000 dual pivot rim brake calipers.
Ultegra offers riders incredibly fast and accurate Di2 or mechanical shifting, and hydraulic or rim braking with near-identical, perfectly ergonomical levers and hoods.
A redesigned asymmetric crank arm takes its cue from the Dura-Ace 9100 design with a beefier-looking Hollowtech II 4-arm design for stiffer power transfer, whilst even dropping a couple of grams (674g, 50-34T) from the previous design (676g).
New hubs (HB/FH-RS700/770) within the wheels encourage faster acceleration with a weight saving of almost 60g compared to a pair of Ultegra 6800 hubs, whilst the rims use a new rigid but lighter carbon lay-up procedure to create a rim brake wheelset that comes in 80g lighter than its predecessor.