DRAG iconic’s All-Mountain RONIN and the carbon cross country weapon ICOSANONA spotted with the ROTOR 1×13 Mountain groupset!

1×13’s proven hydraulic technology gives you a super light ride with complete reliability as you rip through to the mud or pedal thousands of kilometers.

With 13 speeds you have more range when climbing, downhilling or on the flat with a choice of perfectly sequenced sprocket sizes to match your off-road riding style.

ROTOR 1×13 Mountain groupset includes a revolutionary rear derailleur, a choice of elite cassettes, 13 speed specific hubs and the world’s most sophisticated power meters, cranks and chainrings.

From cross-country to marathon riders, a groupset for every kind of trail.
The ROTOR 1×13 modular platform offers a flexible choice of components and sizing options so you choose the drivetrain set-up that best suits your riding style.

1×13 delivers a bigger gear range and more gear choices compared to existing MTB 1×12 systems. With one additional sprocket you can close the gap in the high gears and ride at your optimal cadence.

Rear Derailleur

The rear-derailleur is the intelligent command center of the ROTOR 1×13 groupset.

Index Inside
Gear indexing is actuated inside the rear derailleur for fast, reliable and accurate shifting.

Armoured Box
Elegant and robust Armored Box structure to protect against all external elements, shocks and impacts.

Go to Origin
Press this button and shift directly to the smallest sprocket for faster wheel changeover. 

Quick Extract
Quick extract system to easily remove and re-install the rear wheel.

Pulse Hydraulics
Proven hydraulic technology means no changing cables or recharging batteries.

The Bolt
A simple and inmediate adjustor to work with 12-speed cassettes.

Weight for rear derailleur, shifter, uncut hoses and liquid: 439 g


Single Trigger Actuation
Shift up and down with only one trigger.

Optional trigger for more efficient shifting while downhilling.

Direct Mount
Clamp free attachment for better handlebar clearance and low weight.

1x chainring

Wide choice 1x sizes to choose the perfect set-up for the terrain you ride.

Optimised tooth profiling for fast and precise shifting experience.

Maximise your pedalling power output with our emblematic Q RINGS®.


Select from a wide choice of elite performance cranks and power meters.

Modularity allows you select the perfect crank length, chainring, axle or spider combination.

Easily install or switch out elements with a simple assembly system.

13s cassette

True Cadence
Data driven gearing with a closer progressive sequence in the first seven sprockets and greater increments of range in the six larger sprockets.

Incredibly lightweight
Unified structure with minimum weight for high performance precision cassette.

Optimised profiling of cassette teeth for a fast and precise gear shifting.

Cassette Sizes: 10-52 (331g) / 10-46 (304g) / 10-39 (247g) / 10-36 (243g)


In both thirteen and twelve speed formats, 1×13 groupset works with standard 12-speed chains. For this reason we have chosen the market leader KMC X12. 

Market leading high performance KMC X12 chain.

Long Lasting
Extremely durable with quick assembly.

126 links weighing in at 269 g.

13s Hub & Wheels

We designed a 13 speed specific hub by restructuring the spacing of the hub complying with disc brake frame standards.

Superior hubs with lightweight and high performance, built to last a lifetime.

11s / 12s HG compatible. 

Find out more about the innovative groupset here: https://rotorbike.com/1×13-groupset-mtb/