Chainrings for Shimano Groupsets – The Mechanic Parts
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Chainrings for Shimano groupsets

Aero & Narrow-Wide Upgrades

TMP Chainrings for Shimano Ultegra, Dura-Ace, 105 & GRX

Get the absolute most out of your Shimano drivetrain with handcrafted chainrings from The Mechanic Parts. Whether you're looking for a narrow wide chainring for your Shimano gravel bike, or an aero chainring to shave seconds off your next time trial; we CNC-machine the exact upgrade you need. Discover our full range, specifically designed to seamlessly integrate with your Shimano crankset, and instantly experience a tighter, quieter, and more reliable drivetrain.

Which TMP Chainring Fits My Shimano Bike?

Shimano makes fantastic groupsets, but their standard chainrings aren’t always tailored to your specific goals. Whether you’re diving into the mud or racing a time trial, The Mechanic Parts offers a targeted upgrade for your Shimano 105, Ultegra, Dura-Ace, or GRX crankset.

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TMP Aero Chainrings for Shimano


Looking for maximum speed in time trials, triathlons, or fast criteriums? Our solid, 12-speed aero chainring for Shimano minimizes aerodynamic drag and delivers immediate wattage gains. This ring is fully compatible with the asymmetrical 4-bolt pattern of Shimano 105, Ultegra, and Dura-Ace. For Ultegra and Dura-Ace cranks, we also offer comparable chainrings for 11-speed setups. Because we machine these rings from solid aluminum, you will experience unprecedented stiffness and direct power transfer. Our aero outer rings (for 2x setups) are available up to 60T. Riding a single aero ring (1x setup)? Then we machine these up to a massive 64T for the true time trial powerhouses.

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TMP Chainrings for Shimano GRX

Our highly durable chainrings are specially developed for 10-, 11-, and 12-speed Shimano GRX cranksets and are easily mounted using a standard set of chainring bolts. Riding a double setup (2x)? We offer ultra-precise inner and outer rings for silky-smooth shifting performance. Riding a single setup (1x)? Our narrow wide tooth profile with mud-clearance grooves effortlessly sheds sand and keeps your chain locked in place, even on the roughest terrain. Available in all sizes: from smaller gears for youth riders to massive chainrings for the true gravel kings and queens.

For maximum speed during beach races, the single chainring is also available in a solid aero variant!

TMP Narrow Wide Chainrings for Dura-Ace, Ultegra, and 105

Prevent dropped chains in the mud with our narrow wide chainrings. The alternating tooth profile grips the chain securely, while the specialized cutouts clear away sand and debris. Perfect for riders looking to convert their Shimano Dura-Ace, Ultegra, or 105 crankset into a lightweight and highly reliable 1x setup.

The Benefits of a 1x Narrow Wide Setup on Your Shimano Crank

Upgrading your standard double Shimano setup (2x) to a custom 1x drivetrain from The Mechanic Parts provides several technical advantages:

  • Ultimate Chain Retention: Thanks to the narrow wide profile, the chances of dropping a chain are virtually eliminated. In most cases, a chainguide is completely unnecessary.
  • Significant Weight Savings: You can say goodbye to your front derailleur, inner chainring, and the associated shift cable or battery.
  • Superior Stiffness and Aerodynamics: Our aero chainrings have no cutouts, resulting in less flex during explosive sprints and a smoother airflow.
  • Custom Gear Ratios: Where standard brands often stop at 50T or 52T, we offer more extreme sizes so you can perfectly fine-tune your cadence to your specific discipline.
Shop our narrow wide chainrings

Frequently Asked Questions about TMP chainrings for Shimano

Yes, our Aero chainrings are specifically designed to seamlessly match the asymmetrical 4-bolt design of modern Shimano 105, Ultegra, and Dura-Ace cranksets. Before purchasing, just make sure to select the correct 11-speed or 12-speed variant for your drivetrain in the dropdown menu.

By removing your front derailleur and switching to a 1x (single) setup, you save weight and eliminate a prime spot for mud buildup. The unique narrow wide profile holds the chain rock-solid, giving you a much simpler and highly reliable setup for off-road riding, beach racing, and cyclocross.

No, Shimano GRX cranks have a different Bolt Circle Diameter (BCD) and chainline compared to road-specific cranks like 105 or Ultegra. Therefore, when ordering, make sure to choose the specific “GRX” chainring for your gravel bike, and order the regular asymmetrical 4-bolt rings for your road bike.

In most cases, a chainguide is unnecessary. Our narrow wide chainring grips the inner and outer links of the chain so securely that it won’t bounce off, even on rough gravel sections or during an intense cyclocross race. A lightweight chainguide is sometimes added only for extra peace of mind on extremely rough descents.

The size of the chainring depends on many factors, such as your strength, the type of rides you take, the terrain you ride on, weather conditions, and the type of bike. We cannot determine which chainring size is right for you personally.

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