Our premium 2X Cannondale Hollowgram compatible direct mount Oval chainrings are designed for Hollowgram crank family like SI, SISL, SISL2. Incredibly stiff and light. Super fast shifting thanks to our patented shifting ramp design. Sold as set only.
Chainrings use proprietary bcd mounting system, therefore they are sold as sets of 50/34 or 52/36T combination only.
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Size (Mass +/-1g): |
50/34T (184g), 52/36T - (188g) |
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Color |
Black |
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Compatibility |
Cannondale Hollowgram Si, SiSL, SiSL2. chain: 10, 11spd |
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Material |
cnc machined 7075 Txxx Aluminum. Long-lasting construction |
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Finish |
anodized |
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Chainline |
Same as original spidering. |
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Ovality |
Optimized to each size separately. 34T- 6.5% ; 36T- 11.4%, 50/52T - 10-11.2% ; Timing of 108 -110.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending |