With expensive options like CeramicSpeed’s UFO chain and Muc-Off’s Nanochain wearing off quickly and leaving you with a standard (albeit high end) chain, Finland’s Rex took their decades of ski wax experience and created a complete system for optimizing your bicycle chain in a much more economical manner. And claim better performance, too.
Rex Race Day Spray is a fluorocarbon spray that they claim maintains a minimum 3 watt savings over six hours of riding in adverse conditions, and it lasts for a few hundred kilometers. In testing done by Wheel Energy, it also reduced chain noise by 1db for five hours and it only gained 0.5 watts of friction over a 7 hour test designed to simulate spring classics races’ wet conditions.
The watts savings are compared to using a standard wet chain lube that wears off/down over the course of a 3-5 hour race. Each bottle provides three full chain applications, and a can retails for $94.90 / €79,90.
RDS is designed to work with their Domestique Chain Lube specifically and is not a lube in itself, so you’ll need to completely degrease your chain apply their lube first. After that, you can add more of their chain lube as needed, saving the other RDS applications for big races. The lube is wax based, with high PTFE and fluorocarbon content, but without any solvents, so it’s 100% lube. Meaning a little goes a long way, with recommended application being only 1g for a complete chain.
These two products are part of their complete line, including a high PTFE & fluorocarbon Assembly Grease and a 100% biodegradable, non-alkaline Bicycle Wash. All of their products are made in their own factory in Hartola, Finland.