Rex Black Diamond Chain Lube 30 g

Supreme performance in dry and wet

Longest lasting ever

Chain lube in independent laboratory testing.

Rex Black Diamond has been thoroughly tested in independent testing laboratories on two continents. In tests conducted by Zero Friction Cycling (Australia) and Wheel Energy (Finland), Black Diamond was tested to be the longest lasting chain lube ever, and also one of the lowest friction chain lubricants.

To date, no lubricant has remotely demonstrated the treatment longevity of Rex Black Diamond, which outperformed competing lubricants in tests, even when tested with an astonishingly long lubrication interval of 1,000 km. 

Entire Zwift season with a single lubrication? No problem! Black Diamond makes your chain silky smooth and silent. In indoor cycling, it is possible to ride over 5000 kilometers with a single lubrication, before the chain wear starts increasing. No other lubricant on the market matches the lubrication performance of Black Diamond.

Black diamond

Ultrasonically treated in rex R&D lab

The secret of our new lube are the Black Diamond particles that are mixed into the lube in a time-consuming ultrasonication process at our factory’s Racing Service
lab. The Black Diamond particles significantly improve the properties of the lube: Lower friction, lower wear and increased rain resistance. 

Black Diamond reaches full lubrication performance without any drying time or run-in period. In tests conducted by Zero Friction Cycling, Black Diamond demonstrated excellent penetration capabilities when applied as per our instructions.

N-kinetic nanowax

Featuring the latest race ski wax technology

We have upgraded the wax used in Black Diamond lube to the same high fluor Rex N-kinetic™ nanowax which is used in our best cross-country ski waxes. The slightly lower viscosity results into lower friction and better lube penetration into the chain. Rex is well known for its world cup level ski waxes and is an expert in paraffin wax-based applications with six decades’ worth of experience.

Rain resistant

Next level combination of dry and wet weather performance

Previously, seeking for the lowest possible friction in a chain lube has meant sacrificing all-weather performance. So-called “wet” lubes have traditionally been very energy-stealing. Rex Black Diamond combines test-winning friction levels with strong weather resistance in a previously unseen way. Black Diamond has been tested in demanding race conditions by our elite athlete team. The true king of chain lubes!

Wax based

Solvent-free, non-vaporizing, undiluted

Adding solvent or water to a chain lube is generally thought to be a great way to reduce manufacturing costs and give the manufacturer a better margin. At Rex, we think otherwise. Every drop you apply on the chain is 100% lubricant and not something that will evaporate into the air. Unlike with most chain lubes, there is no need to wait until the solvent evaporates before you can ride your bike.