The KMC X Flat Waxed Chain is one of those products that solves a problem you might not have realised you had. Waxed chains offer genuine performance benefits over traditional oil-based lubrication – lower friction, better cleanliness, and longer drivetrain life – but the faff of actually waxing chains yourself has always been a barrier. Strip the factory lube, degrease, dry, hot-wax, let it cool, break it in… it’s a proper palaver. KMC’s ready waxed solution cuts through all that nonsense. You can install it straight from the packet and ride.
The chain’s flat-top profile is designed specifically for SRAM’s 12/13-speed AXS and Transmission drivetrains. It’s not compatible with Shimano or Campagnolo systems, but if you’re running SRAM, it’s a direct replacement.
I’ve been running it on a SRAM Rival T-Type groupset for several weeks now, and the experience has been genuinely positive.
Installation is straightforward: it includes 126 links and a reusable Missing Link connector, so sizing and fitting are no different from any other chain.
Before putting it on, the chain is noticeably clean. There’s no oily residue on your hands or clothes, which is refreshing compared to traditional chains that arrive covered in factory grease. The wax coating has a slightly dry, almost chalky feel to it, but once installed, it runs smoothly and quietly. First impressions of the bike were excellent: shifting was crisp and precise, with no fuss or adjustment required.
Performance has remained consistently good throughout testing. Shifting quality on the Rival T-Type groupset is on a par with the SRAM chains I’ve used previously: quick, accurate, and reliable across the cassette range. There’s no perceivable difference in shifting speed or precision, which is exactly what you want from an aftermarket chain. It runs quietly, with none of the clunking or grinding you sometimes get from chains that aren’t quite compatible with the drivetrain.
The big advantage of the wax treatment becomes apparent after a few wet rides. Traditional oil-lubed chains become magnets for road grime – that black, sticky mixture of oil, water, and road dirt that coats everything and accelerates wear. The waxed chain sheds this stuff far more effectively. After a wet ride, the chain might look a bit dusty, but it doesn’t accumulate that thick, abrasive paste. A quick wipe with a dry cloth and it’s clean again. No degreaser needed, no black hands, no mess.
Maintenance is brilliantly simple. KMC supplies their GO WAX lubricant separately, which you can use to top up the wax coating as needed. Just apply a drop to each roller, let it dry for a few minutes, and you’re done. There’s no need to strip the chain back to bare metal and start over; you’re just refreshing the existing wax layer. This makes it a far more practical solution for regular use than full hot-wax immersion, which most people realistically aren’t going to do every few hundred kilometres.
Longevity is harder to gauge without running it for thousands of kilometres, but early signs are promising. KMC claims the wax treatment doubles durability compared to oil-based lubrication, and the lack of gritty contamination certainly suggests the drivetrain will last longer. The wax forms a protective barrier that’s more water- and dirt-resistant than oil, which should reduce wear on the chain, cassette, and chainrings over time.
> Your complete guide to waxing your chain: how to save watts and keep your chain clean for longer
At around £52.99, it’s more expensive than a basic SRAM chain (which goes for about £35-40) but comparable to or cheaper than SRAM’s premium Force or Red chains (£45-75). Given that you’re getting the wax treatment included and the associated performance benefits, the price seems entirely reasonable. You could buy a cheaper chain and wax it yourself, but that involves time, equipment, and considerable faff; this just works.
Overall, the KMC X Flat Waxed Chain is a proper solution for anyone running SRAM AXS or T-Type drivetrains who wants the benefits of a waxed chain without the hassle of DIY waxing. It shifts well, stays clean, and makes maintenance considerably easier. The fact that you can top it up with KMC’s GO WAX lube rather than having to strip and re-wax also makes it genuinely practical for regular use. This is how waxed chains should work.
Test Report
What does the manufacturer say about this product?:
KMC describes the X Flat Waxed chain as specifically designed for SRAM’s 12/13-speed AXS and Transmission (T-Type) drivetrains. The key selling point is the factory wax treatment using KMC’s GO WAX formula, which they claim delivers low-friction performance straight out of the box and doubles durability compared to conventional lubrication. And as its factory waxed, you don’t need to go through the process yourself, saving time and potential hassle.
They emphasise that wax-treated chains resist dirt adhesion, reduce abrasive wear, simplify maintenance, and extend drivetrain service life. The X-Bridge structure features optimised chamfering and a widened inner bridge to ensure precise, stable shifting across a wide range of gear combinations.
Tell us some more about the technical aspects of this product:
The X Flat is built with KMC’s Double X Bridge construction, which features precisely chamfered inner and outer plates to improve shifting precision and speed. The flat-top profile matches SRAM’s proprietary design, with a distinctive flat upper surface that allows for a narrower overall chain width while maintaining strength and durability.
The chain comes with 126 links at 1/2″ x 11/128″ sizing, weighing approximately 262-295g depending on finish. Available in either silver (nickel-plated) or Ti-N gold coating, both offering corrosion resistance and surface hardness. The wax treatment uses KMC’s GO CHAIN WAX formula, which is biodegradable and PFAS-free.
The wax coating forms a water-repellent microfilm on the chain, reducing friction and protecting against corrosion. Unlike oil-based lubes, wax-based lubes don’t attract dirt and grime, keeping the drivetrain cleaner for longer. The treatment is applied at the factory, so the chain arrives ready to install without removing factory grease or applying fresh lubricant.
Includes a reusable Missing Link connector for easy installation and removal. Compatible exclusively with SRAM 12-speed AXS (Force, Red, Rival) and 13-speed Transmission/T-Type systems. Will not work with Shimano, Campagnolo, or non-AXS SRAM drivetrains.
Any further comments on quality?:
The wax coating is applied evenly across all links with no obvious gaps or inconsistencies. The Missing Link connector operates smoothly and feels secure. After several weeks of use, including some properly wet and gritty rides, there’s no sign of premature wear or degradation. The chain maintains its shape, and the wax treatment hasn’t flaked off or disappeared, though it does gradually wear and require topping up as you’d expect.
Any further comments on performance?:
The wax treatment delivers on its promises. The chain stays noticeably cleaner than oil-lubed chains, even after wet, muddy rides. Road grime doesn’t stick to it as much, and what does accumulate wipes off easily with a dry cloth. This keeps the entire drivetrain cleaner, which should extend the life of the drivetrain.
The low-friction properties are harder to quantify subjectively, but the chain certainly doesn’t feel any slower or less efficient than oil-lubed alternatives. Studies have shown waxed chains offer measurable watt savings over oil, and while I can’t verify that on the road, there’s no reason to doubt it.
Top-up maintenance with KMC GO WAX is simple and quick. A few drops on each roller, let it dry for a few minutes, and you’re done. No degreasing needed, no mess, no grubby hands. This makes the wax treatment genuinely practical for regular use rather than something you do once and then give up on because it’s too much faff.
How does the price compare to that of similar products in the market, including ones recently tested?:
Compare it to SRAM’s own chains: Rival is about £35-40, Force is £45-50, and Red is £65-75. The KMC sits in the middle of that range, while offering something none of the others does: a factory wax treatment. If you were going to wax a chain yourself, you’d need to buy wax (£15-25), a slow cooker or pot (if you don’t have one), and spend an hour or more on the process. The KMC eliminates all that.
The ability to top up with GO WAX lube rather than having to strip and re-wax adds significant value. You’re not locked into the full hot-wax process every time the chain needs refreshing. This makes it far more practical for regular use.
Did you enjoy using the product? Yes
Would you consider buying the product? Yes
Would you recommend the product to a friend? Yes
Use this box to explain your overall score
A brilliantly practical solution for SRAM AXS/T-Type riders who want the performance benefits of a waxed chain without the hassle. Shifts beautifully, stays clean, and makes maintenance genuinely easy. This is how waxed chains should work.
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12 thoughts on “KMC X Flat Waxed Chain”
Is your bike really ready to ride a few minutes after applying GO Wax ?
The KMC website says to “Allow to dry completely before riding”, so clearly this statement from the author is BS.
Makes you wonder about the accuracy of the rest of it. Seems to ignore the fact that a pre-waxed chain only saves you the faff of cleaning and waxing the first time, not every other time you need to completely re-wax.
I fear the BS is coming from your good self sir, the KMC website says that you’re good to go straight after topping up with GOWAX:
https://www.kmcchain.eu/service/care-of-waxed-chains
“applying KMC GO WAX…..Allow to dry completely before riding”
FWIW, KMC say the video is from “our Taiwanese colleagues” and they will be getting it corrected.
After reading I came to the same conclusion. To rewax a chain you need to strip it down completely. I usually do this in nearly boiling water then it goes back into the wax pot.
If you add a drip wax that will extend the life of the pre-installed stuff but that only works a hand full of times before a complete overhaul is needed. This can be around 8k-10k kilometres depending on conditions. But then you are right back at square one.
For the price of this, I could buy 2 chains and alternate them on the bike. I have one installed and another waxed ready sat in a bag I can just swap out.
And if people dismiss this, the chain weighs about the same as a Shimano 105 or SRAM Rival chain. 284g quoted here for 126 links. This ain’t no hollow pin DA or Red quality chain which in itself sans wax would probably be better performing.
If it was 8000 to 10000km before a complete rewax, it wouldn’t be a problem.
I’ve been waxing chains for a few years now, when I’m ready to rewax I just pop the chain straight into the slow cooker, there’s no need to strip it or clean it again. At best mine gets hosed down with the rest of the bike after wet or dirty rides then run through a cloth afterwards.
Worth noting that if a pre-stripped and/or pre-waxed chain appeals, you can get other brands from inaspin.co.uk
Every wax brand recommends you strip it back before rewaxing as contaminants will work into the links. Without a clean before rewaxing you are not going to Remove that build up. It only needs a quick wash to soften the wax and allow it to flush out any debris. It takes minutes.
*sigh* the One True Way… https://www.sheldonbrown.com/chainclean.html
> “This makes it a far more practical solution for regular use than full hot-wax immersion, which most people realistically aren’t going to do every few hundred kilometres.”
Eh, buy 3 or 4 chains. Wax them all at the same time. Swap over to a freshly waxed chain every 200 to 300 km. Do the hot wax thing every 600 to 900 km (3 chains), or every 800 to 1200 km (4).
And the hot wax thing isn’t that hard either. Use chain link press to squeeze the quick-link and open it. Remove chain. Put into ultrasonic cleaner for 20 odd minutes, while the wax is warming. Dip chain into or run chain through your wax. Leave to cool. 10, 20 odd minutes later whip it back on bike. Job done.
The fussiest part of chain cleaning for me is filtering the lamp oil / white spirits I use in the ultrasound cleaner. I pour the oil from the cleaner into a jug, then strain it through coffee filters back into the bottle, so I can re-use it for next time. That takes time.
There are various places on the internet where you can buy ready-waxed chains, or just chains fully stripped of their factory grease ready for DIY waxing (removing the factory grease is the step in the wax process that is the most faff IMHO).
There are also various drip waxes that can be used on waxed chains (e.g. Silca Super Secret; CeramicSpeed UFO; Rex Black Magik drip wax).
Without going into all the possible permutations and combinations of how one could achieve the benefits of waxed chain without doing everything oneself, I think this review would have benefitted from pointing out that such other options exist. The review seems to take the view that it’s either this or DIY hot wax from scratch, which isn’t true. A more nuanced take on how this KMC option stacks up to other more directly comparable approaches would have been helpful.