Kinetic-One “K1-26SL ULTIMATE” Alloy Wheelset




INTENDED USE:  The lightest (26mm deep - circumferential) version of our best selling "all purpose" 2-WAY FIT" Tubeless & Clincher road/sportive wheelset.  Several build options - with the lightest SuperAerolight++  Model weighing in at a tiny 1370 grams! And that’s for a new generation wider tubeless wheelset rated for riders up to 115kg.


Designed and hand built here in the UK with a triple emphasis on maximising aerodynamics, minimising weight, whilst at the same time maximising the strength characteristics demanded by UK roads.

So it’s light and tough for the hilliest and roughest of Sportives, Fast-accelerating enough for the busiest of bunch races and aero enough to ensure that you gain every possible watt of drag reduction. Several build options available - some lighter, some tougher and some both!

Beautifully finished (matte black rim with machined silver brake track), very light, superbly strong. Our ultimate rims are made from the latest generation aerospace grade superalloys and are packed full of the latest rim tech.


Your wheels were hand built to order here in the UK by Andy Morgan, owner and founder of k1 wheels. 

Utilising top end PSR superlight spokes, or upgrade to the Sapim CXRAY spokes for the ultimate in light/strong/aero spokes.

The use of high-end materials on rims,hubs, spokes and nipples means we can get weights down to a very small number - without compromising at all on strength

Features a superb new wider rim profile compatible with both tubeless and clincher tyres. Slightly wider rims are the future of road wheels. They enable seamless tyre interfaces for max aero gain, they allow for wider tyres for shorter 'contact patch' and less rolling resistance. And to top it all -  they are tremendously comfortable - easing the lower back in the  final miles of those long long rides.

We think these are the best clincher/tubeless rims available. A bold claim but every time we build a set of these wheels we get very excited. The balance in the rim is fabulous - and from a geeky wheelbuilder point of view they build up to almost perfectly even tension - with tighter tolerances than any other wheelset we have ever built. From a rider perspective a rounder, truer, faster wheel is the simple result. Sounds basic but this is what wheelbuilders strive for. The rims are all pinned, welded with milled sidewalls. So super strong with beautiful attention to detail. It takes many hours to build a wheelset so using top notch components makes that labour a real pleasure!

The 23mm wide rim has fabulous cross-sectional strength whilst maintaining a tiny weight. It represents the very apex of the latest developments in the understanding of how to balance forces and tensions in a wheel. It's a joy to be able to partner these rims with CX-Ray spokes (always the peloton pro's choice) and PSR SL aero spokes, with the beautifully made Bitex hubs, with Japanese ezo bearings.

These wheels are extremely well priced we feel - sitting at about £200 less than our entry level carbon wheels. And that's the point perhaps - They are the very highest end alloy wheel we produce and are just full of top quality parts - and still cost less than the start point for carbon wheels. Ok some people have just got to have carbon ... we get that too .. but these are certainly a superb option to consider with a raft of benefits in every department.

Tubeless can be run at lower pressure than clinchers and this helps provide a more comfortable ride and it also eliminates the possibility of pinch flat punctures (caused from hitting potholes etc.) It's also the case that by filling the tubeless tyre with a sealant you can pretty much avoid all punctures forever more - even if you ride over glass or a nail sticks right through your tyre. Just remove it and the tyre will reseal around it!  

We recommend the new Hutchinson Fusion 5 Performance tubeless tyres or for pure speed and ease of ownership:  the Continental GP5000 Clincher tyres. WE CAN SUPPLY AND FIT TYRES IF YOU REQUIRE.

Available in 2 build options: 20/24 spokes (for riders up to 95kg)  or 24/28 spokes for those up to 110kg. 



RIM Aerospace grade alloy  - Tubeless and Clincher compatible
Matte black with machined silver sidewall
FREEHUB FITTING SHIM/SRAM 7/8/9/10/11 or CAMPAG 9/10/11 or XDR
HUBS Miche (Ultralow Drag), Bitex or Bitex SL HUBS 
BEARINGS Sealed Cartridge throughout – All hub types
NIPPLES Alpina Blu power Nyloc Self-locking (the best!)
RIM TAPES Included
(20/24 spoke)



​​​​​(weights for XDR +20 grams for Shim/Sram)

Advised Rider weights 100kg 20/24 spoked version,
115kg 24/28 version

 Shipping Weight (Box plus wheels)

Weight: 4kg

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