Cannondale Hollowgram

Cannondale Hollowgram Narrow wide chainrings are specially designed for 1×9, 1×10, 1×11 and 1x12 systems and perfectly fitting the Cannondale Hollowgram Si, Si 2016, SiSI2 cranckset systems.
Working with the new Cannondale frames, such as F-SI, Scalpel SI, Beast of the East, Bad Habit.

  • Narrow wide system : thanks to the variable thickness of the teeth, the chain is hold from dropping even in rough sections!

  • Smooth spinning compared to a classic chainring thanks to the special design of the teeth profile.

  • Increased chain retention during strong jolts thanks to the improved teeth height.

  • Mud evacuation system for a top performance whatever is the weather.

  • Gain 150 to 400 grams on your bicycle weight when going from a classic configuration (with front derailleur and chain guide) to a single front chainring made by Amber Bikes.

  • Made from hard wearing aluminum alloy.

Technical specifications
  • Material: 7075-T6
  • Manufacturing: CNC Milling
  • Weight (+/-1g): 44g (26T), 50g (28T), 54g (30T), 60g (32T), 69g (34T), 72g (36T), 83g (38T), 88g (40T). 
  • Chainline/Offset (mm): 46,5/7,2 (26T), 46,5/7,2 (28T), 47,4/6,3 (30T), 47,8/5,8 (32T), 49,7/4 (34T), 50,3/3,4 (36T), 51,4/2,8 (38T), 52,4/1,3 (40T).
  • Weight Oval (+/-1g):  51g (28T), 57g (30T), 63g (32T), 68g (34T), 75g (36T), 83g (38T).
    • Chainline/Offset Oval (mm): 52,1/4,1 (26T), 52,8/3,4 (28T), 53,6/2,6 (30T), 54,8/1,4 (32T), 56/0,2 (34T), 57/-1,2 (36T), 58,2/-2,4 (38T).
    • Compatible with Cannondale Hollowgram Si, Si 2016, SiSI2 crancksets.
    • Surface coating: Colored anodized