Rotor Uno: world's first hydraulic groupset is the lightest disc brake groupset yet

Rotor has officially launched its new Uno groupset. It comes with a host of innovative features including hydraulic shifting. At a claimed 1604g (not including cranks), it's lighter than both SRAM Red and Shimano Dura-Ace

Rotor uno groupset rear derailleur

Rotor’s original product back in 1996 was its RCK crank system, while its widely used Q-rings launched in 2006. It’s expanded its product range since to include cranks and power meters.

At the official launch of Rotor Uno near Madrid this week, Lars Janssen, the company’s Uno Product Manager, said: “Offering a complete groupset was the next logical step for Rotor”. But Rotor hasn’t just followed the crowd with Uno. It’s been working on it for six years, developing some innovative features and producing a solution with very low overall weight.

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Paul Norman

Paul started writing for Cycling Weekly in 2015, covering cycling tech, new bikes and product testing. Since then, he’s reviewed hundreds of bikes and thousands of other pieces of cycling equipment for the magazine and the Cycling Weekly website.

He’s been cycling for a lot longer than that though and his travels by bike have taken him all around Europe and to California. He’s been riding gravel since before gravel bikes existed too, riding a cyclocross bike through the Chilterns and along the South Downs.