This is the Dr. Pulley 21x15 SLIDING Roller Weights, 169-359 for the Vespa GT 200, Vespa GTS 250 and Vespa GTS 300.
Traditionally, gear ratio is changed by the up-and-down rolling movement of the roller weights in the ramp of the Moveable Drive Pulley (MDF).
Now the innovative Dr. Pulley Sliding Roller Weights slide up-and-down the ramp to change the gear ratio. This unique sliding movement (not rolling) provides exclusive advantages to increase CVT performance:
- With Dr. Pulley, no abnormal wear will occur even when running in high gear.
- Dr. Pulley's U.S. Patent Number 7,276,004 states that their sliding roller weights eliminate abnormal wear
- Prevents reduction gear ratio deterioration
- Prolongs the useful life of the transmission
- Have the availability to adjust reduction gear ratios as well as driving performance.
- At the same time, Dr. Pulley Sliding Roller Weights are adapted to compensate for wear automatically, to adjust by itself to move further outward in a movable drive pulley half and to make the vehicle reach a higher maximum vehicle speed.
For the 21x15 ROUND Roller Weights, click here.
Product Specifications:
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Size: 21x15
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Set of 6
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Broadens Your Range of Gear Ratios
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Increases Acceleration and Re-Acceleration Properties
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Increases Top End Speed
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Lasts Longer Than Standard Roller Weights
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U.S. Patent Number: 7,276,004
