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    Sonder Black i21 Aero Wheelset

    Carbon road 700c wheelset

    £849

    Performance carbon road bike wheelset with ratchet drive 36-point engagement freehub for speed and instant acceleration. At 1560g a set these are a must for your next step into road racing.
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    Pre-order now for despatch from 0 . We'll keep you up-to-date with your order progress and despatch as soon as it is available.

    • Free Delivery over £50

    • Free Returns

    Sonder Black i21 are our carbon performance road wheelset. Designed to maximise speed and improve climbing efficiency, ultimately moving you faster for longer.

    They're built to race; eating up the miles year after year on Alpine epics, far-flung British back roads and post-work blasts. Designed, laced and precision-built in the UK.

    • Unidirectional carbon 32mm low-profile rims with Sapim spokes
    • Disc brake specific and tubeless-ready design for 25 - 45mm tyres
    • 36-point engagement for quick acceleration and pedalling efficiency
    • Super lightweight at 1560g a set

    We’ve used a super light rear hub with a ratchet drive mechanism that has a 36-point engagement, so the freehub is ready to drive forward with every 10° of rotation. That means there's no lag between you pressing on the pedals and getting drive to the rear wheel. And the more you push the more engaged the drive is and its not affected by any flex in the hub - this is especially important on steeper climbs and when the going gets rough!

    Our unidirectional carbon rims tied with Sapim spokes make for super strong wheels at just 1560g a set. Make the most of the weight savings with confidence they'll be able to handle demanding descents and the biggest sprints. drops away into singletrack.

    The i21 Black's natural habitat is to race fast an ideal upgrade to your setup if you just want a speed boost on weekend road rides or fast weekday commutes. A lightweight wheel is a game changer when it comes to acceleration, the lower distribution of weight at the rim equals a lower moment of inertia and less effort required to spin the wheels up to speed.

    MADE IN BRITAIN

    We lace, build and finish all our wheels in our Nottingham factory, with each one getting a full quality control inspection. We’ve brought the build process in house from overseas to enable us to produce something truly special. We can oversee the whole construction of our wheels and keep quality consistent, production efficient and reduce the impact on the planet by not shipping boxes of wheels around the world.

    Features

    Key Features

    • 36 point hub engagement (10°), giving huge engagement area and no chance of slipping
    • 30mm external tubeless compatible rims
    • 6 Bolt disc mount
    • Proven Sapim spoke for a strong build
    • Fully sealed hub bearings for longer lifespan and low maintenance
    • HG, XDR and Microspline freehub compatibility
    • Covered by our 28 Day Ride Guarantee

    Vital stats

    Weight

    1,560g

    Tyre Compatibility

    25mm – 45mm, tubeless compatible

    Rims

    Diameter: 700c
    Internal width: 21mm
    External width: 30mm
    Rim depth: 32mm
    Material:Carbon Raw UD finish
    Weight: 400g

    Hubs

    36-Point 10° splined system with fully sealed cartridge bearings
    12mm internal rear axle
    6061 Alloy Body
    6 Bolt Disc Mount

    Spokes

    Sapim spokes
    24 front, 28 rear

    Axle Size

    Front: 100mm x 12mm bolt-through
    Rear: 142mm x 12mm bolt through

    Sustainability and Product Care

    Where it is made

    All our wheels are assembled here in the UK at Alpkit HQ.

    Our wheel-building machine can lace a wheel in just 1-3 minutes! The skilled hands that lace and finish the wheels can put 30 pairs of wheels through the machine in a day.

    The wheels are built across two machines: the lacing machine and the truing machine. The lacing machine learns the rim dimensions, spoke count, location of the valve hole and angle of the nipple driver. The result is an evenly tensioned wheel. The truing machine tensions spokes, working towards pre-defined tolerances.

    Reducing our carbon footprint

    Building wheels in the UK massively reduces shipping volumes. By not shipping wheel boxes around the world – or, more specifically, boxes full of fresh air – we're reducing their impact on the planet.

    28 Day Ride Guarantee for full Sonder Bike builds and Wheels

    If you don’t love your Sonder bike or Sonder wheels you can send them back for a no-quibble refund within 28 days.

    Alpine Bond

    Our wheels are covered by a 3 year Alpine Bond.
    If one of our products does not meet your expectations upon delivery, or if during its lifetime does not live up to the demands placed upon it, please return it to us for repair, replacement or refund. If the problem is our fault then we will do this to your satisfaction. If it’s your fault then we will help out the best we can. Alpine Bond