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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.
Size (Mass +/-1g):
39T (34g), 53T (110g)
Color
Black
Compatibility
Shimano Dura-Ace 7900,7800, Ultegra 6700, Shimano 105- 5700, Tiagra 4600, FSA, Rotor 3D & 3D+, S-works and many more. Compatible with Di2
Important
If you currently use 53/39T round chainrings you have 130BCD cranks. You are looking at correct product.
BOLTS
For Outer chainring please order Long bolts
Changing Inner chainring to oval only? use original bolts
Material & Finish
cnc machined 7075 Txxx Aluminum. Long-lasting construction, type II anodizing
Ovality
Optimized to each size separately. 39T- 6.5%, 53T - 10.3% ; Timing of 108.5° after TDC (top dead center). Patent Pending
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