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Rex Black Diamond Hot Wax Chain Lubrication is Faster, Longer Lasting, More Complicated

Rex Black Diamond Hot Wax chain treatment low-friction lubrication, render
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Finnish-made Rex Black Diamond wax lube already claimed to be the “fastest ever” a few years ago, but now Rex have figured out how to go even more ultra-low friction and ultra-low wear with their customizable Hot Wax chain lubrication treatment. Sure, hot waxing a chain was already much more complicated than simply dripping on some chain lube, but the result is lower drivetrain friction, a cleaner-running chain, and the ability to more accurately optimize lubrication for your type of riding.

Rex Black Diamond Hot Wax chain treatment

Rex Black Diamond Hot Wax chain treatment low-friction lubrication, box contents
all c. Rex

The Rex brand is still more closely linked to parent company Redox’s solid ski waxes – the core driver behind developing their original Black Diamond wax-based chain lube – so it makes sense for them to go for a hot-applied solid wax, too. Rex says that as they see more cyclists willing to put in the extra effort of a heated solid wax application, they knew they could deliver a higher level of performance than what was already on the market.

Why Hot Wax over Lube?

Rex Black Diamond Hot Wax chain treatment low-friction lubrication, wax-treated chain

Hot-applied solid wax tends to last much longer, reducing drivetrain friction in most cycling applications much longer than conventional chain lubes. Plus, it doesn’t attract dirt & grime that grinds away at your chain, it doesn’t get you greasy, and tends to be pretty resistant to wet riding. A solid waxed chain is cleaned simply with warm water and a quick wipe-down. All those pros start to outweigh the major con of it being a pain in the butt to deep clean a chain and properly met wax into it… at least for performance-focused cyclists willing to put in the extra work upfront.

Now, with independent test data from the Australian Zero Friction Cycling lab showing that it can double the usability between re-waxings compared to market leaders Molten Speed Wax & Silca Hot Melt, it may be even easier to commit to the additional waxing prep.

What’s new? How long does Hot Wax last?

Rex Black Diamond Hot Wax chain treatment low-friction lubrication, details

Rex’s solution is a 2-part Hot Wax, with 11 more conventional white paraffin wax blocks as a base and then 1 block of black wax with concentrated additives to improve the performance of your chain’s lubrication. Essentially the black block is like a solid version of their low-friction Black Diamond wax-based lube and the white blocks are the carrier that binds it to your chain.

Melt all 11 white blocks and the 1 black block for an all-conditions lubrication solution that is ultra-long lasting for clean & dry road riding – up to 1100km between retreatments. Or for even higher durability, melt 4 white blocks to 1 black block to create a race-optimized wax that delivers performance up to 1400km before retreatment. Rex suggests that you can then use the extra white blocks as part of a “cleaning and pre-treatment” of your chain to help keep the chain’s wax cleaner, longer.

Rex Black Diamond Hot Wax chain treatment low-friction lubrication, Zero Friction Cycling lab results
Zero Friction Cycling test results, c. Rex

Interestingly, it looks like Zero Friction Cycling’s tests show Rex Black Diamond Hot Wax’s major performance gains are mostly limited to dry roads. But also on dry & dusty gravel, cyclocross, and mountain biking it can outperform the competition. And when it starts to get properly wet and muddy, Rex Wax can still mostly hold its own with the best solid chain waxes out there.

Rex Black Diamond Hot Wax – Pricing & availability

Rex Black Diamond Hot Wax chain treatment low-friction lubrication, packaging

Rex produces their new Black Diamond Hot Wax treatment for bicycle chains in-house in Hartola, Finland. The new Hot Wax is becoming available now, retailing for 56€ including the 11+1 (480g in total) blocks of special wax. Rex says that with one package, you can “wax the chain several dozen times”.

Find it now in specialist brick-and-mortar bike shops around the world, and via select online retailers, plus Rex is actively working on expanding its bike retailer distribution.

Rex.fi

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Dirk
Dirk
1 month ago

Honestly there are no cons in waxing if you do your prep once and for all. I have now 30k km with msw on 1 cassette, 1 set of chainrings and 3 chains in rotation. Deep cleaning you say ? Never needed if you run two crockpots with this stuff. The dirty pot helps clearing the grit out and the fresh applies a new layer. The work involves to wax 3 chains every week take literally 10minutes. For rain days it simply using some old kettle with boiling water to melt of the wax and clear the grit after the ride. Dry it in a soft cloth and put it away for your next wax treatment. Also cleaning your bike now is a breeze. Never oil flinging around on your bike. People think that’s a lot of work till you ask them how they clean their chain. Wiping it with degreaser is not cleaning as the grit is still in the roller. And if you need to do that properly you need quite some mineral turps to flush it every time again

Deputy Dawg
Deputy Dawg
1 month ago
Reply to  Dirk

Curious how many times you’re comfortable re-using a quick link, since the recommended number is zero. Not snarking, truly curious.

dan
dan
1 month ago
Reply to  Deputy Dawg

quick link re-use depends on manufacture. ie: Shimano is 1 and done. Connex is reusable and rocks!

Brian
Brian
1 month ago
Reply to  dan

I’ve reused Shimano about 5 times without issues. Also SRAM, no problems.

Dano
Dano
1 month ago
Reply to  Deputy Dawg

Using YBN 11 speed chains and quick links, I reuse the quick links after 5-7 waxings. Replace when it stops clicking into place. Haven’t had any issues. Been waxing chains for a decade.

sean
sean
1 month ago
Reply to  Deputy Dawg

I’ve used Shimano a quick link about 10 times now and plan to continue using it.

Robin
Robin
1 month ago
Reply to  Deputy Dawg

I’m comfortable re-using the quick links as long as there’s a nice “click” felt when it is closed. I’ve had zero issues doing this with YBN links and with SRAM Eagle links.

J D
J D
1 month ago

Started this in 2011 or so when it first got popular. I still have a goodwill crock pot. Glad ppl are making it on their own now.

Pbergonzi
Pbergonzi
1 month ago
Reply to  J D

“Goodwill crock pot.”–Right on.

Hard work
1 month ago

I think those companies selling overpriced paraffin have the biggest margin ever in the cycling industry, which is in general famous for big margins.
One can just use paraffin or paraffin PTFE mix with a very similar effect.

Robin
Robin
1 month ago
Reply to  Hard work

Unfortunately, it doesn’t work that way. According to Adam Kerin, at Zero Friction Cycling, a guy who tests this stuff, getting the ingredients right is not easy, and companies spend a lot of time and money to get it right.

Jon Einar Visser
Jon Einar Visser
1 month ago
Reply to  Hard work

Just use ski wax. Works very well and even comes in liquid powder form. Way better than hot waxing and ultra water resitant, because some use fluor. Fluor is more watter repellant than paraffina and it also lubes the chain well! It’s used for less friction on snow, so I think there’s no need to buy sepperate chainw ax if you regularly wax skis and have leftover…

Mud
Mud
1 month ago

This might work for road riders, but I ride my gravel bike on trails and have to wash my bike (high pressure hose) quite often. Don’t trust wax as a lasting solution in that scenario.

evan
evan
1 month ago
Reply to  Mud

I use wax on my MTB and gravel bikes as well, and it lasts as long between applications as any other lube I’ve tried in the last 25 years. Silca Super Secret drip on works well to top up on rides longer than 100km and bikepacking trips, and it works fine to just hot wax over it.

I was reluctant to hot wax after trying it in the 90s with pure candle wax and not really seeing too many benefits, but this new generation is the real deal. Do the prep and enjoy clean drivetrains that last twice as long.

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