DT-Swiss RR21 DiCut review

The RR21 is a tubeless ready wheel that can also be used with conventional clincher tyres. We put it to the test

DT Swiss RR21 DiCut
Cycling Weekly Verdict

A super set of wheels that also look great. Excellent hubs, solid construction and light wide rims. Tubeless compatible too! A superb option for those looking for a do it all upgrade wheel set

Reasons to buy
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    Hubs roll great and look super cool

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    Tubeless ready

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    Great performance for the price

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    Wide internal rim

Reasons to avoid
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    Tubeless set up can be a faff

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    mounting tyres can require a special pump

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

Tubeless wheels and tyres are growing in popularity. For those who don’t know, tubeless tyres are similar to a clincher, but form an air-tight seal against the rim and contain sealant, instead of an inner tube. The sealant is able to seal holes and punctures as you ride.

>>> Buyer's guide to road bike wheels (video)

The rims are tubeless ready

The rims are tubeless ready

DT-Swiss is famous for its hubs and it shows with the 240’s on these wheels rolling beautifully but also exhibiting excellent pick up and engagement when you put the power down. They also look really cool, with machined diamond like cuts contrasting against the matte finish.

The rear hub. The hubs have cool diamond cut outs, just for aesthetics

The rear hub. The hubs have cool diamond cut outs, just for aesthetics

>>> Should you change to tubeless tyres

The Swiss brand describes the RR 21 as an extremely practical wheel that is also perfect for competition. I would be inclined to agree. I was able to test these wheels, not only in the UK but also the Alps, using them to climb and descend the iconic Stelvio pass. The rims are noticeably light, making them ideal for climbing, but also for attacking and sudden accelerations.


Video - Watch how a tubeless wheel survives and seals a nail hole!

When descending the lateral stiffness was very good, contributing to assured cornering, while the braking was also very good too.

The ratchet skewers are excellent. Great design

The ratchet skewers are excellent. Great design

The wide 18mm rims mean that tyres sit wider, resulting in more grip and increased comfort. We are a big fan of this attribute. At 18mm, 25mm tyres sit well and our Schwalbe One tyres were mounted without fuss. Although to mount them we did have to use an Airshot to blow the tyres onto the rim. If you are considering a switch to tubeless, factor in that you might need a special pump.

>>> Buyer's guide to road bike tyres.

The rims are tubeless ready out of the box, not requiring any additional rim strips or tape. They may be expensive, but considering the weight, quality and hubs these hoops are very competitive for the price. The stiff, solid construction combined with tubeless compatability will see them fit for plenty of applications, from cobbles and winter use to racing and climbing.

For more information, head over to DT-Swiss.

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Oliver Bridgewood - no, Doctor Oliver Bridgewood - is a PhD Chemist who discovered a love of cycling. He enjoys racing time trials, hill climbs, road races and criteriums. During his time at Cycling Weekly, he worked predominantly within the tech team, also utilising his science background to produce insightful fitness articles, before moving to an entirely video-focused role heading up the Cycling Weekly YouTube channel, where his feature-length documentary 'Project 49' was his crowning glory.