Rex Race Day Spray Chain Coating 85 ml

Because a clean drive train is an efficient drive train.

Unmatched dirt repellency with unique hydrophobic per-fluorocarbon PTFE formula

Rex Race Day Spray is a unique solution for treating your chain and cassette by yourself, for extremely low friction and maximal dirt repellency. Rex is an expert in fluorocarbon coatings, and we have decades worth of expertise in manufacturing them for cross-country race skiing. Now we are the first in the world to bring the same technology into cycling. Together with our Domestique Chain Lube, Race Day Spray forms a lubrication solution with unmatched longevity and dirt repellency.

Do it yourself chain optimization

Totally new way to improve your chain

Until now, optimizing your chain has required purchasing a pre-optimised expensive chain that becomes a normal chain when the optimization wears off. With Rex Race Day Spray, you can apply the optimization treatment yourself without even removing the chain from the bike. Instead of optimizing only the chain, you can also treat the cassette for improved shifting and dirt repellency in extreme conditions. And in addition, it is also economical: One can of Race Day Spray gives you three chain treatments for a lower price than one readily optimized chain!

Save watts and be faster until the finish line

The tougher the conditions, the more you benefit. Independently dyno tested and Paris-Roubaix proven.

In tests conducted by Wheel Energy testing laboratories, Race Day Spray gave impressive results:

• Drivetrain noise and friction are lower from the beginning of application. (-1dB.) Drivetrain noise stayed -1dB lower during the 5h dyno test.
• A Race Day Spray -treated chain that had been ridden for 7 hours in “spring classics” weather, (dusty and wet gravel and asphalt), gained only 0,5 watts friction when measured post-race and appeared completely clean!
• Chains that are treated with competing optimization solutions like the UltraFast process, typically gain 2.07 W from pre-race to post-race even in shorter races. (As measured by Friction Facts in 2012 )
• Compared to a chain that has lost its lubrication in a race, the advantage when using Rex Race Day Spray is three extra watts in the finish line sprint.

Datasheet

Lab tests verify impressive performance

Fully cleaned chains were tested right after applying the lube, and after a six-hour race simulation test with identical bikes and drivetrains. The test verifies what can also be heard and seen: A chain treated with Race Day Spray stays quiet, clean and efficient.

Frequently asked questions

How long does the treatment last?

The effect of Race Day Spray coating lasts for hundreds of kilometers. When the chain starts to sound dry, you can apply more Domestique Chain Lube. Before applying Race Day Spray again, clean the chain completely.

Can i use race day spray together with an another chain lube than rex domestique?

The formula of Race Day Spray has been developed to work together with our Domestique Chain Lube, and their ingredients are designed to complement each other. We do not recommend using it with an another brand chain lube. Please not that Race Day Spray is a coating and not a lubricant itself, and requires the use of Rex Chain Lube.

Can i apply it on my mountain bike?

Rex Race Day Spray is designed to be used in all cycling disciplines. In MTB use, the dirt repellency capabilities of Race Day Spray keep the drivetrain cleaner in extreme race conditions, reduce drivetrain wear and ensure good shifting performance. Perfect for 24-hour races in muddy conditions.

Application

• Degrease the chain and apply Rex Chain Lube generously (2-3 applications).
• Spin the drivetrain slowly to make the lube penetrate, wipe off excess lube.
• Spray onto chain from ~2 cm distance for a couple seconds while spinning the cranks backwards quickly. Repeat also on the inner surface of chain near the top derailleur pulley.
• Let dry until chain appears white.
• When raining, apply also onto cassette.
• Complete instructions with video: rex.fi/bike

After drying, the chain and cassette appear completely white. What you see is PTFE and full perfluorinated wax. The carrier solvent makes the coating go inside the chain links also.