Electric assistance. Your bike.Kickstarter coming soon

Keep the pace.

An electric carbon wheelset for the road or gravel bike you already love.

Designed in Christchurch, New ZealandExplore ↓

Keep riding the bike you love.

Reviews

Road tested in the real world.

Riders and reviewers around the world have put Duo through its paces. More coverage is on the way.

Brian FowlerA full ride review of the Duo wheel system
Rider on a white bike fitted with Duo wheels
Keep what matters

Not another e-bike.

Duo works with the bike you already chose, fitted and love. Add assistance without permanent modifications, bulky hardware or a tangle of wiring.

Your fit. Your groupset. Your ride.

How it worksRemove. Install. Ride.
  • 01

    Swap the wheels

    Fit the Duo wheelset in place of your existing wheels. No frame modification, no permanent hardware.

  • 02

    Mount the battery

    The compact battery mounts to the bottle cage bosses and connects with a single cable.

  • 03

    Ride with assistance

    The torque sensor reads your pedalling and adds a helping hand when you want it.

Rider climbing a hill road above the Canterbury plains on a bike fitted with Duo wheels
Ride feel

A little help when you want it.

Duo responds to how hard you pedal, so the help arrives the moment you need it and fades as you ease off. A torque sensor built into the rear hub reads your effort as you ride. Switched off, the wheels are designed to roll with minimal drag.

Why riders choose Duo

01

Take the sting out of the climb.

02

Take the long way home.

03

Stay with the bunch when the pace picks up.

04

Ride into a headwind on your terms.

05

Keep the bike that already fits you.

Duo does not replace the ride. It helps you stay in it.

The system

Everything you need. Nothing you don't.

A considered electric wheel system, designed to work as one.

Range depends on the ride — how much climbing you do, how much assistance you ask for, the conditions and your own effort all change how far a charge will take you.

Duo carbon front and rear wheels with the battery and padded wheel bag

What's included

Every Duo order ships complete — wheels, power and the app. Fit it to the bike you already ride.

01

Carbon wheelset

  • Rear carbon wheel with integrated 250 W motor
  • Matching carbon front wheel
02

Power, packed neatly

  • 36 V 7 Ah / 252 Wh compact battery
  • USB-C charger
  • Padded wheel bag
03

Assistance that listens

  • Rear hub with integrated torque sensor, 26 Nm
  • Dedicated Duo app with adjustable assist tuning
Compatibility

Built for modern road and gravel bikes.

Most modern disc-brake road and gravel bikes using 12 × 142 mm rear spacing and 12 × 100 mm front spacing.

  • Rear thru-axle 12 × 142 mm, front thru-axle 12 × 100 mm.
  • Disc brakes only, centre-lock rotors.
  • HG freehub, 11-speed spacing.
  • Battery mounts to standard bottle cage bosses — nothing on the frame is modified.

Final compatibility should always be confirmed for your specific frame, groupset, rotors and brake setup.

Talk to Duo →
From Christchurch to the world

Made by people who ride.

Duo is designed and developed in Christchurch, New Zealand by riders, ex-racers and people who have spent their working lives in the bike trade — building wheels, running workshops and racing at the weekend.

The team behind Duo Wheels in Christchurch

Brad Mitchell

Co-founder and Co-director

Brad co-founded Wattwheels in 2017, bringing a strong background in sales and business management. He's been hooked on bikes ever since. Away from work you'll find him racing through the forest on his mountain bike, riding with his kids or running with his dog.

James (Jimmy) Zwaagman

Co-founder and Director

Hooked on bikes since he was dragged along to his first road race at 12, with years of road and track racing behind him. His first bike-shop job came at 13, and he has worked in the trade ever since — from sweeping floors to managing workshops. He has led bike design and innovation at Wattwheels since 2019, and Duo is his passion project.

Dave Comerford

Technical Manager

Dave, known to everyone as Morris, has been racing since 1989 — the Coast to Coast, the Tour of Southland and countless events besides. He brings that riding experience to the workshop, with more than 20 years building and fixing bikes in bike shops.

Karen Gibson

Office Manager

Karen may not be a regular rider, but she's a bike person at heart. She keeps the office running, the books balanced and the rest of us in check. Away from work you'll find her walking her dogs.

Kickstarter coming soon →

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