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absoluteBLACK Premium Oval Shimano 4 Bolt Outer Chainring

★★★★★ ★★★★★
Premium Oval Shimano 4 Bolt Outer Chainring

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Product ID: ROV9100-4BK

absoluteBLACK Premium Oval Shimano 4 Bolt Outer Chainring DA9100 & R8000

The absoluteBLACK Premium Oval Chainring is the perfect addition to your set up to help improve your pedalling efficiency. Compatible with four-bolt Shimano DA9100 and R8000 chainsets, this outer chainring brings consistency to the pedal stroke by helping to eliminate the dead spot.

The bespoke six-point ramp and recess shifting design helps the chain to move between chainrings with ease, while the 5mm construction provides great stiffness. The oval shape is laid out to provide a maximum radius at the strongest part of the pedal stroke, with a smaller radius at the dead-spot. This layout provides a consistent pedal stroke, where the oval chainrings are not noticeable.

Further benefits include a lower chance of incurring knee pain due to lower stress on the legs when at their weakest point in the revolution. Promoting a higher cadence, especially when climbing, the chainring also helps provide the rider with fresher legs for longer.

absoluteBLACK's size recommendations

  • 50T outer chainring – Choose this size if you ride for pleasure or sportive events. This is the most versatile and comfortable size
  • 52T outer chainring - if you race and feel strong, it's the classic outer chainring size and a great option for experienced riders
  • 53T outer chainring - if you race and feel very strong, it's the classic outer chainring size and a great option for powerful riders

Please Note

  • Ramps on big rings are specially configured for combinations: 50/34, 52/36, 52/38, 53/39T
  • Other configurations will also work, but shifting will be slower and may require more adjustments of front derailleur
  • Shimano recommends a maximum 16T difference between two chainrings


  • Compatibility: Shimano Dura-Ace 9100, R9150 Di2 and Ultegra 8000, R8050 Di2
  • They can also retrofit 9000 and 6800 cranks but use bolt covers for best appearance
  • 10 / 11 / 12 speed compatible
  • Material & Finish: CNC machined 7075 Txxx Aluminium. Long-lasting construction. Type II anodizing
  • One of a kind special oval shape that helps you climb easier and faster
  • Over 15% stiffer than Rotor Qrings due to thicker, 5mm construction
  • Bespoke absoluteBLACK 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
  • Oval shape cannot be felt while pedalling
  • Pedalling action feels smoother
  • Helps to reduce stress on knees, keeping legs fresher for longer
  • Helps to maintain better cadence while climbing
  • Reduces the possibility of leg cramps
  • Typically reduces the requirement for Chainring/cog shifts by at least 15%
  • Weight: 50T (120g), 52T (137g), 53T(139g)

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