Sorry, this product is no longer available!
Kinesis Racelight Aithein Disc Road Bike frame is no longer available at Merlin Cycles. However you may find an alternative or updated product below.
Kinesis Racelight Aithein Disc Road Bike frame - 2016
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Kinesis Racelight Aithein Disc Road Bike frame - 2016Kinesis Racelight Aithein Disc Road Bike frame - 2016Kinesis Racelight Aithein Disc Road Bike frame - 2016Kinesis Racelight Aithein Disc Road Bike frame - 2016Kinesis Racelight Aithein Disc Road Bike frame - 2016

This item was discontinued 4th March 2020.

If you require help finding an alternative to this product please contact customer services.

Cutting edge alloy designed to be ridden fast and carry you far.
The frame is made from Kinesium tubing and shaped using SPF [super plastic forming] technique to fine tune the tubing for a balance of stiffness and strength at the lowest possible weight. The seat tube at the core of the frame is optimised for lateral stiffness for maximum power transfer.
To get the benefits from extra disc brake power we’ve provided more tyre clearance - up to 28mm for more rubber on the road for more grip, less rolling resistance and a little more comfort too. 
The frame now features full internal routing in the Downtube for a much cleaner look, to achieve this a special new BB design with integrated ports for the internal routing providing clean routing with low weight. To match the new frame we have the new tapered full carbon monocoque disc fork with post mount and internal hose routing.
  • Superlight Kinesium tubing, 1300g frame weight (53cm)
  • Internal routing for gears and rear brake
  • Di2 ready
  • Tapered headtube 1”1/8 / 1” 1.5 36 x 45 integrated FSA type
  • BSA threaded 68mm 
  • Includes Frame, Fork, Headset
  • Post mount for and flat mount frame. Frame can be converted to post mount with the correct mounting bracket
  • QR Front and rear
  • 135mm rear hub spacing
  • Requires 31.6mm seatpost size
  • Braze front mech fitting


Petter A long and low, relatively light road disc frame that mostly delivers. Ride quality is good and it feels very stiff on the road, in a good way. The feel is very firm and precise when sprinting out of the saddle, but I'm still comfortably able to do rides lasting up to six hours. This definitely holds its own among all the carbon bikes. The frame handles great in all situations, high or low speed. One of the few frames that's long and low enough to give me(short legs, long torso) a good riding position. The metallic blue color is stunning in nature, much better looking than in the pics and in my opinion well worth the 100g weight penalty over the anodized black. The paintjob also seems to be holding up pretty well. The internal cable routing along the downtube was relatively easy to install thanks to decent sized ports. Several different types of port covers also come with the frame for different set ups(di2, full length brake housing, gear cable, dummy closed one). Note: The fork that was sent to me was for a flat mount brake, as opposed to the post mount that it says in Merlin's description. This suits me really well, as the frame itself is flat mount and mixed types of mounts would have been silly. Just something to keep in mind when ordering. Flat-to-post mount 160 mm adapters are included with the frame for both front and rear. Cons: The promised tire clearance isn't really there. 28 mm Schwalbe Ones on 20 mm internal width rims do not clear the frame at the rear. The fork is tight but ok, chainstays and seat tube are ok with loads of room but the rear seatstay bridge is not. Tire width is not an issue, as there's plenty of space, but tire height is. The same tires on narrower rims could possibly fit, but I'm unable to test this right now. Take the 28 mm tire promise with a pinch of salt, especially with wider rims. The frame comes with 160 mm rear flat-to-postmount adapter but doesn't really fit fit a 160 mm rotor in the rear. Some 160 mm rotors on some wheels rub the chainstay. 140 mm rotor in the rear solves this problem. According to Kinesis the front derailleur attachment points is mounted so high that your larger front chainring needs to be a 52t or bigger. Not an issue for me as I'm running this as a 1x-setup, but something to keep in mind for those wishing to run a 2x compact chainset.