Claiming to be the lightest dual-leg power meter crankset on the market, the new Rotor 2INpower SL crankset keeps their ultra-slim form factor and machines away all extra metal to hit just 530g for 170mm arms with a BB30 spindle. That’s 15% lighter than the prior version, without giving up any performance.
Pair it with their 50/34 chainrings and it’s just 729g, or mix and match from any of their round and oval direct-mount 1x and 2x chainrings (or 104BCD spider) to get the exact gearing you want.
Rotor’s crank arms are machined from 7075-T6 aluminum, then drilled out from the ends to remove excess material inside the arms. For these, they machined a little extra from the edges, too, and the arms are slightly shallower than the non-SL version.
Compared to their non-power meter cranksets with a fully modular system with swappable spindles, these have the spindle permanently attached to the driveside since it houses the battery.
It gets a new self-extracting mounting bolt to make installation and removal easier, with a more secure bolt on the backside to attach the chainring or spider.
Hiding under a dust cap is a rechargeable battery good for 250 hours and fully recharges in 3 hours, using a magnetic cable attachment. All electronics are sealed inside with an IP67 dust/waterproof rating and operating range from -20ºC to 50ºC (-4ºF to 122ºF).
They boast +/-1.5% accuracy with round or oval chainrings, and their app shows advanced pedal stroke and torque data beyond what your GPS cycling computer can display. The app is also used for OTA firmware updates.
The antenna sits off the back of the driveside arm to maintain their slim profile, communicating via Bluetooth and ANT+ to any modern head unit. The cap on the non-drive side simply keeps debris from accumulating in the three holes drilled down the length of the arm.
Rotor’s lightweight one-piece 2x chainrings come in a ton of compatible chainring combos, including new 12-speed tooth profiles to fit both Shimano and SRAM Flattop chains. with plenty of 1x options for gravel, too. They have a narrow 147.5mm Q-factor and come in 165/170/172.5/175mm arm lengths.