SALE : Kinetic-One “K1-40/50 UC” Carbon Wheelset


INTENDED USE: With weights as low as 1375 grams - This is the latest version of our Premium full carbon 40/50mm deep aero wheelset. Designed to create a fantastic ride performance, with superb braking, cushioning, cross-wind handling and heat dissipation.

It balances weight saving, all-weather handling and superb aerodynamics. Perfect for sportives, longer Triathlons ... and also for anyone who is unsure about their bike-handling and hence whether to go full-on aero on the front wheel. At 40mm deep the front wheel is superbly stable - whilst the rear 50mm deep wheel captures the greatest aero gains.


Now in it’s fourth year of evolution - The 40/50UC continues to be one of the most popular wheelsets we produce and is an ideal upgrade for athletes seeking quality British handbuilt wheels on a ‘sensible’ budget.

- The standard “AEROFLOW build with K1 aero spokes and the lowest drag hubs available anywhere, the Miche Primato. These add a little weight but being so fast and so very durable does make them a fantastic all round investment. Especially for bigger guys!

-Or upgrade to our superb new "AEROLIGHT” (1470 gram) version emplys Italian Ambrosio sealed hubs and invests in lightweight aero spokes to get weights down for more hilly/mixed riding.

- If you go for the SUPERAEROLIGHT build at 1435 grams, (with its 'All Season' Bitex hubs) Or the even lighter SUPERAEROLIGHT++ build at 1370 grams) then you really are creating a wheelset that is superbly aero and extremely light too - by any standard.

Or for tge ultimate in resilience and exquisite engineering go for our DTSWISS 350 build.

Your wheels will be hand built to order here in the UK by Andy Morgan, owner and founder of k1 wheels. (current build times are shown above).

Aimed at riders who prefer an ultra modern rim profile - critically without going too wide to cause frame clearance issues! The handling characteristics and strength of modern U rims is superb - even in pretty serious crosswinds - especially when compared to the V-rims of only a few years ago.

Ar 25mm wide, it is optimised for more modern bikes and is ideal for tyres from 25mm, 28mm,  right up to 40mm and beyond. Please make sure your frame can take a wider rim if you go for this option! Or contact us if you’re not sure... we do like to help our customers get it right first time.

Perfect for running tyres at lower pressure, whether you choose clincher or TUBELESS tyre setup!  And of course .......... far more aerodynamic and faster rolling than traditional hoops! 

In terms of rim width we think we've really hit the sweet spot. We carefully explored all of the many possible widths that aero wheels are being developed in. We developed and continually honed our own testing protocols to this effect - and critically we looked at a whole raft of practical "real-world" issues too that many rim makers simply overlook.

AND IF YOU NEED NARROWER RIMS:  we'll still have the right wheelset for you! And if you have an even narrower clearance frame - we can special order in some 23mm wide or even  20mm wide rims for you and we do find that's the only solution for users of many older bike models.



The 40/50UC wheelset is ideal for UK roads and descents in all but the hottest weathers. If you are intending to ride/race very long descents in hot weathers (such as alpine summer sportives) or just want a more familiar braking feel - you may want to look at our full-carbon filament wound wheels.. and please do read our page on safe braking and care for your carbon wheels HERE

Technical Specification

RIM Full Carbon Clincher  700c 40mm Front / 50mm Rear, U-shaped, 25mm wide,  Full Carbon Clincher rim - TUBELESS COMPATIBLE.  UD MATTE CARBON
FREEHUB FITTING SHIM/SRAM 7/8/9/10/11 or  CAMPAG 9/10/11
HUB Miche Italian sealed hubs as standard or upgrade to the Amazing Ambrosio hubs, Super light Bitex 6-Drive hubs. Or DTSWISS 350 hubs.
BEARINGS Sealed Cartridge throughout – All hub types
SPOKE OPTION K1 Bladed aero black as standard
or PSR Aero Bladed -  Ultra light/ultra aero
NIPPLES Alpina Blu power Nyloc Self-locking (the best!)
RIM TAPES Included
Carbon specific brake pads Included
WEIGHT (20/20)




weights XDR - add 15 gram Shim/Sram. (+/- 15 grams)


 Shipping Weight (Box plus wheels)

Weight: 4kg

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