Which Rotor Crankset to Choose? Weight and Compatibility Comparison

Shimano & Rotor 12-speed Crankset Weights (grams)

Below is a comparison table of Shimano and Rotor crankset weights for complete setups (170 mm, all tooth options). Use it to pick the ideal crankset for your goals: lightness, compatibility, or versatility.

713g is the verified weight of Shimano Ultegra R8100 172.5 mm 50/34 crankset
713g is the verified weight of Shimano Ultegra R8100 172.5 mm 50/34 crankset
Shimano vs Rotor crankset weights Complete cranksets · grams · 170 mm arms
Crank arms Chainrings Shimano Rotor
105 Di2 Ultegra R8150 Dura-Ace R9250 Vegast 24 Vegast 30 Aldhu 24 Aldhu 30 Aldhu Carbon
170 mm 50/34 754 700 685 745 680 720 650 550
170 mm 52/36 − 711 692 758 693 733 663 563
170 mm 53/39 − − − 796 731 771 701 601
170 mm 54/40 − − 714 − − − − −
Lighter (− g) Heavier (− g)

Heaviest → Lightest (170 mm, 50/34)

  1. Vegast 24 745 g
  2. Aldhu 24 720 g
  3. Vegast 30 680 g
  4. Aldhu 30 650 g
  5. Aldhu Carbon 550 g

Note: Shimano weights are manufacturer specs. Rotor weights were measured by velo-perso.com for better accuracy.

576g is the verified weight of Rotor Aldhu Carbon crankset with 172.5 mm arms and 52/36 chainrings
576g is the verified weight of Rotor Aldhu Carbon crankset with 172.5 mm arms and 52/36 chainrings

Frequently Asked Questions about Rotor and Shimano Cranksets

Tip: tap/click each question to reveal the answer.

Is a Rotor crankset lighter than a Shimano crankset?

Yes, generally Rotor is lighter. For example, Rotor Aldhu Carbon 50/34 ≈ 550 g vs Shimano Dura-Ace R9250 ≈ 685 g in a similar setup.

What is the lightest crankset on the market?

The Rotor Aldhu Carbon is among the lightest: around 550 g in 50/34 thanks to carbon arms and an aluminum axle.

Why are Rotor cranksets lighter with a 30 mm axle?

Rotor’s 30 mm axles are aluminum (vs steel on many 24 mm systems), reducing mass; the arms are also more aggressively machined. See Vegast 30 or Aldhu 30.

What is the Rotor equivalent of a Shimano 105 crankset?

The Rotor Vegast 24: versatile, well-priced, and fully compatible with 24 mm bottom brackets.

Which crankset should I choose to upgrade from Ultegra 12-speed?

Rotor Aldhu Carbon: lighter, modular, and available in 50/34, 52/36, and 53/39 combinations.

Do I need to change my bottom bracket to install a Rotor crankset?

No if you pick a 24 mm axle (e.g., Aldhu 24 or Vegast 24)—they fit Shimano BBs. For a 30 mm axle, use a matching 30 mm-compatible BB.

What is the weight of the Shimano Ultegra R8100 50/34 crankset in 172.5 mm?

Approximately 713 g.

What is the weight of the Shimano Dura-Ace R9200 (170 mm) in 50/34 or 52/36?

About 692 g.

What is the weight of the Rotor Aldhu Carbon 172.5 mm in 52/36?

Approximately 576 g. Product page: Aldhu Carbon.