Rex Race Day Spray is a unique product 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 products 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.
The research and development for Race Day Spray was done together with the best athletes and world-known independent testing labs, to make sure the product meets Rex quality standards. Rex Race Day is manufactured at our factory in Hartola, Finland.
INDEPENDENT LAB TESTED AND PARIS-ROUBAIX PROVEN.
In tests conducted by Wheel Energy testing laboratories, Race Day Spray produced 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, wet gravel, asphalt), gained only 0,5 watts of friction when measured post-race and appeared completely clean!
Chains that are treated with competing optimization solutions like 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 race, the advantage when using Rex Race Day Spray is three extra watts in the finish line sprint.
WITHOUT EVEN REMOVING THE CHAIN FROM YOUR BIKE.
THE ONLY PRODUCT THAT YOU CAN ALSO APPLY ON CASSETTE.
Until now, optimising your chain has required purchasing a pre-optimised expensive chain, which becomes a normal chain when the optimisation wears off.
With Rex Race Day Spray, you can apply the optimization treatment yourself without even removing the chain from bike. Instead of optimizing only the chain, you can also treat the cassette for improved shifting and dirt repellency in extreme conditions.
In addition, it is also economical: A single can of Race Day Spray gives you up to six chain treatments for a lower price than one readily optimized chain! For 2020. Race Day Spray has been upgraded with a more ample 85ml container, while the price remains the same.
LAB TESTS VERIFY IMPRESSIVE PERFORMANCE.
Fully cleaned chains were tested right after applying the lube, and then again after a six-hour race simulation 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.
After six hours of racing, there is 52% less drivetrain friction with Race Day Spray when compared to a chain that is lubed with Rex Domestique only. And even the Domestique lube is one the most efficient and longest-lasting lubes on the market! The longer you race and the worse the conditions are, the bigger the advantage is.
No other chain coating or optimization solution can match the hydrophobic capabilities of Rex Race Day Spray!