Our Premium Shimano 110/5 (bolt pattern) oval chainrings are designed for pre 2014 cranks like Shimano Dura-Ace FC7950, Ultegra FC6750, Shimano 105-5750 and many more with 5 bolt fitting. These are finest shift-able oval chainrings on the market.
Advantages of absoluteBlack 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%
How to mount 110/5 Oval Chainring:
First, you need to remove your crank from your bike. Once removed, unscrew the 5 bolts that hold two chainrings together with a T-30 torx key. Remove both original rings. Locate the new oval inner chainring with the triangular timing indicator positioned behind crank arm. The bolt holes on the small chainring are recessed – so the nut heads will sit flush with the surface of the chainring - these recesses should face you when mounting the bolts. Absolute Black outer chainrings have a specific recess to accommodate the rear edge of the crank arm - position the outer ring to line up that recess with the crank arm. If you are only switching the inner chainring to oval - use the original bolts that came with your crank. If you are switching to a pair of oval rings, you will need a set of regular ‘double’ chainring bolts. Tighten all four bolts with force of about 5-7Nm. Mount your crank back to the bike. You may also need to adjust the front derailleur upwards by 2-3mm.
Size : 50T (122g), 52T (135g)
Colour Options : Black, Racing Red, Grey
Compatibility : 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
Bolts : For Outer chainring please order "Long bolts" from us OR Bolt Covers. Changing Inner chainring to oval only? use original bolts
Material : CNC machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizing
Ovality : Optimized to each size separately. 50/52 - 10.3%; Timing of 108 -109.5° after TDC (top dead center) - Ideal for road climbing. Patent Pending
Important : 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.
Absolute Black always recommends using a new chain when fitting new chainrings.
