Black Dual Series
BLACK DUAL chains have a natural steel color and are available in 520 and 525 dimensions only. Manufactured with high carbon alloy steel components, solid bushings and rollers, shot-peened plates, pins and rollers to reach high fatigue resistance. Laser marking on outer plates to identify dimension, model and origin. Submitted to performance enhancing pre-stretching, also thanks to the Z-Ring seals, BLACK DUAL chains ensure high mileage, reduced elongation and extended lubrication intervals.
 | Chain Ref | 525 | | Reina Ref | 137ZRA | | Pitch (p) | 15.875mm | | Pitch (p) | 5/8in | | Inner Width (w) | 7.95mm | | Inner Width (w) | 5/16in | | Roller Ø (r) | 10.23mm | | Plate Thickness (t) | 2.2mm | | Plate Thickness (s) | 2.2mm | | Pin Legnth (l) | 23mm | | Weight | 1.13kg/m | | Weight | 1.79kg/100 links | | Weight | 3.96Lbs/100 links | | Avg. Tensile Strength | 34.800 N | | Avg. Tensile Strength | 7823Lbs | | Seal | ZR | | Colour | Black | | Connecting Link | 19+44 |
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