ZF Dual sprockets are among the highest quality and most technically advanced sprockets in the world.
The secret lies in the combination of the durability of steel and the lightness of duralumin.
This aluminum alloy is characterized by its enormous resistance and tightness, as well as its low weight.
The tensile strength is about 11 times higher than that of pure aluminium.
Through hardening, duralumin reaches almost the strength of steel.
The result is less weight and greater durability.
The milled holes in the lower part of the pinion teeth guarantee optimal self-cleaning.
These milled holes ensure that dirt cannot accumulate between the teeth and that the chain and sprocket do not wear out as quickly.
The durability of ZF-Dual sprockets is approximately three times higher than that of pure aluminum sprockets and they are 50% lighter than steel sprockets.
Ideal for use on and off the road. DIVISION: 520 INSIDE DIAMETER: 105MM CIRCLE SIZE: 124.50 MM HOLE: 8.5MM HOLES QUANTITY: 9 SCREW TYPE: FLAT HEAD QTY TEETH: 50 CROWN TYPE: DUAL