描述
PULLEY CASE
LIGHTWEIGHT AND HIGH HARDNESS DESIGN，WITH THE PRECISION GRINDING CALCULATION，THE ROUNDNESS TOLERANCE IS REDUCE TO 0.005mm，
ALSO THE SURFACE ROUGHNESS BECAME RA0.03，THE DRAG FRICTION WILL BE MORE SMALLER
THE WEIGHT WITH THE ORIGINAL PULLEY CASE IS 107g，THE WEIGHT WITH THE LIGHTWEIGHT PULLEY CASE IS ONLY 38g，
IT’S WILL REDUCE THE CRANKSHAFT LOAD AND THE ROTATION SPEED WILL GO UP FAST AND SENSITIVE
MATERIAL: AEROSPACE ALLOY MATERIAL MADE
HRC 58
AVAILABLE FOR: VESPA Sprint / Primavera / S / LX /LT / LXV 3V IGET 125/150/GTS/GTV 300
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