Shimano Ultegra 6800 11-Speed Groupset Chainset Option: 53-39T. Groupset Specification Chainset Options: 50-34T / 52-36T / 53-39T Crank Arm Length: 172.5mm (We Are Unable To Swap This Out For Alternative Crank Arm Lengths) Front Derailleur: Ultegra 6800 11 Speed - Braze On Rear Derailleur: Ultegra 6800 11 Speed - Short Cage SS Shifters: Ultegra 6800 11 Speed STI (Front & Rear) With Inner Cables Calipers: Ultegra 6800 (Front & Rear) Chain: Ultegra 6800 11 Speed Cassette: Ultegra 6800 11 Speed - 11/28T Bottom Bracket: BB-R60 Ultegra 6800 Please Note: The Groupset is supplied with only the sizes of components listed above, we cannot swap out parts for alternative sizes. Shimano Ultegra 6800 11 Speed Groupset The Ultegra 6800 groupset brings you pro tour level technology for a wallet friendly and great looking price. Ultegra benefits from a plethora of trickle down technology from Shimano's range topping Dura-Ace groupset and with great looks as well as cutting edge technology the Ultegra 6800 is a no brainer for the serious and competitive cyclist. Offering crisp and smooth shifting across 22 gears this groupset really is cutting edge and won't leave you wanting, from racing through to the hardy commuter there isn't a discipline where the 6800 won't excel and surpass expectations. Give your bike the groupset it deserves with Shimano's Ultegra 6800. Chainset Key Features Crank Construction: 2-Piece Crank Chain Compatibility: 11-Speed (CN-6800) Cassette Compatibility: CS-6800 Chainring Sets: 50-34T / 53-39T / 52-36T Bolt Circle Diameter: 110 Crank Arm Length: 172.5 Chain Line: 43.5mm Approx Weight: 765g (With Bottom Bracket) Rear Derailleur Key Features Model Numbers: RD-6800-SS (Short) Cassette Compatibility: 11 Speed Maximum Sprocket: 28T / 12T (Short) Minimum Sprocket: 23T / 11T (Short) Maximum Front Difference: 16T ( Short) Total Capacity: 33T (Short) Approx Weight: 195g (Short) Front Derailleur Key Features Model Number: FD-6800 Cassette Compatibility: 11 Speed Top Gear Teeth: 53T Maximum Capacity: 16T Chain Stay Angle: 61-66 Mounting: Braze-On Chain Line: 43.5 Approx Weight: 89g (Braze-On) Shifter Key Features Model Number: ST-6800 Optical Gear Display: No Cassette Compatibility: 11 Speed Front Shifting: Double Shift Cable: EV SLR Approx Weight: 425g (Pair) Brake Caliper Key Features Model Number: BR-6800 Brake Type: Super SLR Dual Pivot Cartridge Shoe Holder: R55C4 Carbon, R55C4-1 Carbon (wider than 25mm rim) Drop: 49mm Approx Weight: 335g Bottom Bracket Key Features Model Number: BB-R60 Compatibility: HollowTech II road cranksets Approx Weight: 77g NB: Image for illustration purposes only.