HomeCARBON Rim Brake Wheels SALE

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



INTENDED USE: With weights as low as 1320 grams - This is the latest version of our Premium “Ultimate” full carbon 40/50mm deep aero wheelset. Fully updated with the latest carbon FILAMENT WOUND (FW) technology to create a fantastic ride performance, with superb braking, cushioning, cross-wind handling and heat dissipation.


The 40/50 sits precisely between the K1-40FW and K1-50FW in our range. It balances weight saving, all-weather handling and superb aerodynamics. Perfect for sportives, longer Triathlons and for anyone who is unsure 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.

This wheelset is ideal for Road, Sportives, Triathlons, and also spot-on for Time Trials too.  They are "2-Way Fit", Meaning they are designed for both clincher tyres and the new generation of tubeless tyres.

Our standard AEROLIGHT builds are based around superb Italian made sealed hubs and PSR Aero spokes. 

For Maximum Aerodynamics, Lightness, and All-Round high performance - whilst keeping to a realistic budget: go for our SUPERAEROLIGHT build version (with the wonderfully aero psr superlight spokes/Bitex Superlight hubs).They come in at 1390 Grams a PAIR!! 

- By using cxray spokes, and Bitex superlight 65 gram front hub, we can save another 65 grams! That's our 1320 gram SUPERAEROLIGHT++ version.

Or if you want it all - why not upgrade to one of our DTSwiss versions for the Ultimate in Swiss precision engineering.

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).

Filament winding technology is an automated method which has revolutionised rim consistency in the manufacture of full carbon wheels. Made from single carbon filaments - the manufacturing process enables precise control of every step - resulting in the roundest, strongest, lightest wheel combinations.

This level of precision and care extends throughout the entire quality control process -  with each and every rim X-Rayed for structural uniformity and compliance.

Not only does this make for stronger, longer lasting wheels - but also the nature of the "winding process"  facilitates another new technology that massively increases braking capability - especially at high temperatures.  


The filament winding process enables the injection of a patented ultra heat resistant resin - directly into the carbon filaments - whilst the rim is built. This means the rim's braking surface is fully impregnated with resin during manufacture - rather than a braking surface being added to the surface of the rim post-production.

This makes for better braking - especially on longer descents. These rims have their braking performance tested up to 230 degrees celcius.  This is 20  degrees higher than our previous rims - and as high as any top-end rims on the market.


NOTE: Whilst rim tech has leapt forward in recent years - there are still some major things users of carbon wheels need to know! Please do read our page on safe braking and care for your carbon wheels HERE

Your wheels will be Handbuilt in the K1 workshop in Gloucestershire. We combine traditional wheel-building techniques with cutting edge technology. And the world of carbon wheel-tech moves endlessly forward! Exciting times!

YOU CAN RUN THESE WHEELS WITH CLINCHERS OR WITH TUBELESS TYRES: IF YOU WANT US TO SUPPLY AND FIT TYRES WE CAN DO THIS - so that you're ready to ride them straight out of the box. CLICK HERE if you'd like to purchase this option!

Ideal for tyres from 25c right up to 30c and beyond. Perfect for running tyres at lower pressure and arguably more aerodynamic and faster rolling than traditional hoops. 

The rim width debate will continue to rage and rage. What with rims now available from 19 mm right through to 28mm wide. We've decided to go straight down the middle and our rims are Significantly wider than old-school rims but not crazy wide. We think that's the best place to be!


Offered With Full Warranty and professional mechanic support in-house.

Technical Specification

Full Carbon Clincher  700 C - Filament wound with patented Ultra-High Temp Resin impregnated braking surface.

40mm FRONT / 50mm REAR vertical depth. U-shaped, 25.5mm 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 Ambrosio, Bitex, Bitex SL, or DTSWISS hubs
BEARINGS Sealed Cartridge throughout – All hub types

PSR aero,  PSR Aero SL, or Sapim CXRay

NIPPLES Alpina Blu power Nyloc Self-locking (the best!)
RIM TAPES Included
Carbon specific brake pads Included


(+/- 20 grams)

1470 GRAMS PER PAIR : AEROLIGHT 20/24 version


1320 GRAMS PER PAIR ( SAL++ CXRAY) 20/20version

1365 GRAMS PER PAIR DT240 EXP 20/24 version

Weights XDR - add 15 grams Shimano.


 Shipping Weight (Box plus wheels)

Weight: 4kg

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