These Premium Shimano 110/4 bcd compatible oval chainrings are designed for Shimano cranks like Dura-Ace 9000, Ultegra 6800, 105- 5800 and others.
These are finest oval chainrings on the market in terms of shifting, smoothness of pedaling and manufacturing quality.
Not compatible with FSA cranks.
Ovality:
Optimized to each size separately.
34T- 6.5%.
36T- 11.4%, 38T- 11.4%, 50/52 – 10.3%.
Timing of 108 -109.5° after TDC (top dead center) – Ideal for road climbing.
Patent Pending.
Size (Mass +/-1g):
34T (31g), 36T (37g), 38T (41g), 50T (120g), 52T (137g) (53T coming soon).
´´Our Premium Shimano 130/5(bolt pattern) oval chainrings are designed for pre 2014 cranks like Shimano Dura-Ace FC7900, FC7800, Ultegra FC6700, Shimano 105 -5700 and many more.
These are finest shift-able oval chainrings on the market.
If your current chainrings are 53/39T this is a model you require.
Ovality:
Optimized to each size separately.
39T- 6.5%, 53T – 10.3%.
Timing of 108.5° after TDC (top dead center).
Patent Pending.
Size (Mass +/-1g):
39T (34g), 53T (110g).
BOLTS.
For Outer chainring please order Long bolts.
Changing Inner chainring to oval only? use original bolts.






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