Our Premium Shimano 110/5(bolt pattern) oval chainrings are designed for pre 2014 cranks like Shimano Dura-Ace FC7900, Ultegra FC6750, Shimano 105 -5750 and many more with 5 bolt fitting.
These are the finest shift-able oval chainrings on the market.
Both, inner and outer oval chainrings are optimised with smooth shifting in mind.
This is why the back of the Absolute Black Oval road chainring does not feature cutouts, like other oval products on the market.
Instead, we design smooth angled surfaces, to help chain to slide quickly and precisely between chainrings. Absolute Black outer oval chainrings have 6 up-shifting ramps, for easy and quick gear change, even under load.
Each outer chainring also features 12 down-shifting points. Instead of steel shifting pins we use a CNC machined "ramp and recess" solution.
Special raised ramps work in conjunction with the tooth recesses to stabilise the chain when shifting.
Our oval chainrings DO NOT require any modification to the (standard) front derailleur in order to work properly.
If you currently use 53/39T chainrings you have 130BCD cranks (not 110bcd).
In this case please look at our 130BCD chainrings as you will not be able to use anything smaller than 53/39T.
Ovality: Optimised 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 centre) - Ideal for road climbing. Patent Pending
Size: (Mass +/-1g): 34T (30g), 36T (36g), 38T (41g), 50T (122g), 52T (135g)
For Outer chainring please order Long bolts
Changing Inner chainring to oval only - use original bolts
Advantages of Absolute Black Road Oval chainrings:
One of a kind special oval shape that helps you climb easier and faster (Patent Pending)
Over 15% stiffer than Rotor Qrings due to thicker, 5mm construction
Bespoke Absolute Black 6 point ramp and recess shifting design shifts better than any other brand and model of oval chainring
Finest design that provides excellent strength to weight ratio
You will not "feel" the oval shape while pedaling
Your pedalling action will feel smoother
Helps reduce stress on knees and helping your legs remain fresher for longer
You will be able to maintain better cadence while climbing
Reduces possibility of leg cramps
You will reduce chainring/cog shifts by at least 15%
Shimano Dura-Ace 7950, Ultegra 6750, Shimano 105- 5750, Tiagra 4650, FSA, Rotor 3D & 3D+, S-works and many more older cranks.
Also fits SRAM Force and Red but NOT compatible with SRAM cranks that have 1 hidden chainring bolt (Force22, Red22).
Compatible with Di2