Cannondale Hollowgram (Ai-compatible)

Connondale Hollowgram (Ai-compatible) Narrow wide chainrings are specially designed for the Cannondale Hollowgram Si/Si 2016, SiSl2 cranks.
IMPORTANT: While placing order, please leave a comment if you need it compatible with a normal chain or 12-speed (incl. Shimano HG+ & SRAM AXS Flattop)

  • 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): 39g (26T), 45g (28T), 53g (30T), 57g (32T), 62g (34T), 70g (36T), 78g (38T), 84g (40T).
  • Weight Oval (+/-1g): 40g (26T), 46g (28T), 53g (30T), 58g (32T), 63g (34T), 69g (36T), 78g (38T).
  • Chainline (mm): 49.4mm (28T), 50.4mm (30T), 51.4mm (32T) 52.3mm (34T), 53.7mm (36T), 52.9mm (38T), 52.3mm (40T).
  • Chainline Oval (mm): 52.1mm (26T), 52.8mm (28T), 53.6mm (30T), 54.8mm (32T), 56mm (34T), 57mm (36T), 58.2mm (38T).
  • Offset (mm): 4.3mm (28T), 3.3mm (30T), 2.3mm (32T), 1.4mm (34T), 0mm (36T), -0.8mm (38T), -1.4mm (40T).
  • Offset Oval (mm): 4.1mm (26T), 3.4mm (28T), 2.6mm (30T), 1.4mm (32T), 0.2mm (34T), -1.2mm (36T), -2.4mm (38T).
  • Compatible with: Cannondale Hollowgram Si/Si 2016, SiSl2 crancksets
  • Surface coating: Colored anodized