New Rotor 2INpower SL is the ‘lightest dual-sided power meter ever’

Rotor has added a new power meter to their 2INpower range in the form of the 2INpower SL, and the Spanish brand claims that “it’s the lightest dual-sided power meter ever”.

The 2INpower SL (superlight) is 15% lighter than its predecessor, tipping the scales at a claimed 530g with a 170mm crank length.

Currently retailing on Rotor’s website at €1,149, it has a claimed accuracy of +/- 1.5% and a maximum battery life of 250 hours of ride time off of a three-hour charge.

It’s compatible with Rotor’s four-bolt, 110mm BCD spiders and 1x or 2x direct-mount chainrings, and can be paired with Bluetooth and ANT+ devices.

2INpower SL is “lightest on the market”

Rotor

The spindle and 170mm cranks have a claimed weight of 530g.

Rotor has been one of the leading manufacturers of power meters for a number of years and the original 2INpower was first announced in 2016.

Since then it’s undergone multiple iterations but the latest has followed modern trends by going down the lightweight route, and Rotor claims to currently have top-trumped it’s rivals by creating the lightest dual-sided power meter ever.

The claimed 530g weight accounts for 170mm cranks and a 30mm aluminium axle. Adding Rotor’s 50/34-tooth chainrings brings that figure up to a claimed 729g.

That’s a little lighter than Shimano’s Dura-Ace FC-R9200-P Power Meter Crankset which has a claimed weight of 745g also with 170mm cranks and a 50/34-tooth chainset.

Helping to achieve this low weight, the power meter is forged from aeronautical aluminium and the 30mm axle can be paired with one of Rotor’s bottom brackets, making it compatible with most bikes.

And the “stiffest” power meter available

Rotor

The power meter is created from aeronautical aluminium.

Beyond the weight, Rotor says it’s also the stiffest power meter on the market, something achieved through their Trinity Drilling System technology.

Adding to the overall performance, it also has a claimed accuracy of +/- 1.5%. That’s in the ballpark of most modern power meters which usually have a claimed accuracy near to this figure.

As it’s dual-sided, the power accuracy per leg will be better compared to spindle-based power meters which only measure the overall power and then estimate the power split per leg.

A power meter for anyone

Despite the clear performance-orientated design, Rotor says that the power meter is designed for anyone, “from the cyclist who is just starting out in watts power measurement to the professional who depends on power measurement to achieve his or her best success in every race”.

While it’s unlikely many new cyclists will be in need of a high-performance power meter, they have included some notable features to make the 2INpower SL more user-friendly.

This includes a new app with an enhanced interface which is designed to make certain functions such as firmware upgrades and device connectivity easier. It also allows users to share data with third-party apps such as Strava and TrainingPeaks, useful if you want to prove those new record power numbers to your friends. Don’t forget, if it isn’t recorded, it didn’t happen.

Assembly should also be easier thanks to self-extracting cranks. Rotor says that it’ll make assembly easier for less-mechanically-experienced riders, although we’d always err on the side of caution with these things if you have any doubts and get a local bike shop to do the job.

Power is provided by a Li-ion battery which has an estimated battery life of 250 hours of ride time. That’s a respectable amount and it has a claimed recharge time of only three hours using a USB cable.

Users can check the battery level via the app.

The 2INpower SL is currently retailing for €1,149 and you can check out the power meter on Rotor’s website.