This is your direct Shimano replacement option. If you have a Shimano GRX crank this fits directly in your existing BB and uses your existing chainrings, both 1x and 2x.
The NG Rotor ALDHU R power meter set Road is our recommendation for bikes with a Shimano bottom bracket. The set consist of the NG power meter and the Rotor ALDHU R crankset with 24mm steel axle. This is a direct replacement for your Shimano GRX crankset with a 24mm spindle that fits all compatible Shimano BB's as well as fitting either (and both) your Shimano GRX 1x and 2x chainrings.
Advantages over the Rotor Power2max edition crank:
- Aldhu R 24 uses a higher grade aluminum to create a stiffer crank
- Aldhu R 24 uses further machining to reduce the weight by ~40 grams
- Aldhu R 24 has a more premium finish
The aluminum crankset is forged and hollow-bored and weighs only 542g. Its 24mm steel axle allows it to replace all current Shimano-cranksets without using any special tools. Due to customer demand the set was developed for the Shimano Hollowtech II bottom bracket standard and combines superior stiffness with an excellent price-performance ratio.
Introducing our new GRX replacement gravel powermeter:
- GRX Spacing/chainline
- 5mm wider Q factor than road/ our other gravel powermeters
- Ability to run either Shimano GRX 1x or 2x chainrings
| Crank axle diameter | 24 mm |
| Q factor | 152 mm |
| Compatible frame formats | BB30, BB86 Pressfit, BB386EVO, BB90, BSA68, ITA70, PF30, T47 |
| Chain line | 47 mm |
| Sensor weight 104 BCD | 145 g |
| Crank plus sensor weight 104 BCD * | 644 g |
(* Crank length 175 mm, without bottom bracket, without chain rings)