{"product_id":"dr-pulley-21x15-sliding-roller-weights-169-358","title":"Dr. Pulley 21x15 Sliding Roller Weights","description":"\u003cp\u003eDr. Pulley 21x15 Sliding Roller Weights for the Vespa GT 200, Vespa GTS 250 and Vespa GTS 300. \u003cspan style=\"color:rgb(255,0,0);\"\u003eAll weights on sale.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003ePlease select weight from drop-down menu.\u003cbr\u003e\u003cbr\u003eTraditionally, gear ratio is changed by the up-and-down rolling movement of the roller weights in the ramp of the Moveable Drive Pulley (MDF).  \u003cbr\u003e\u003cbr\u003eNow the innovative Dr. Pulley Sliding Roller Weights \u003cstrong\u003eslide\u003c\/strong\u003e 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.\u003cbr\u003e  \u003c\/p\u003e\u003cp\u003eDr. Pulley's U.S. Patent Number 7,276,004 states that their sliding roller weights eliminate abnormal wear, prevent reduction gear ratio deterioration, prolong the useful life of the transmission, and have the availability to adjust reduction gear ratios as well as driving performance. At the same time, Dr. Pulley Sliding Roller Weights are also 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.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e  \u003c\/p\u003e\u003cdiv style=\"FONT-FAMILY:Tahoma;\"\u003eSize: 21x15\u003c\/div\u003e\u003cdiv style=\"FONT-FAMILY:Tahoma;\"\u003eSet of 6\u003c\/div\u003e\u003cdiv style=\"FONT-FAMILY:Tahoma;\"\u003eBroadens Your Range of Gear Ratios\u003c\/div\u003e\u003cdiv style=\"FONT-FAMILY:Tahoma;\"\u003eIncreases Acceleration and Re-Acceleration Properties\u003c\/div\u003e\u003cdiv style=\"FONT-FAMILY:Tahoma;\"\u003eIncreases Top End Speed\u003c\/div\u003e\u003cdiv style=\"FONT-FAMILY:Tahoma;\"\u003eLasts Longer Than Standard Roller Weights\u003c\/div\u003e\u003cdiv style=\"FONT-FAMILY:Tahoma;\"\u003eU.S. Patent Number: 7,276,004\u003c\/div\u003ePiaggio, Various unlisted makes\/models, Vespa","brand":"Dr. Pulley","offers":[{"title":"17G","offer_id":49986412249368,"sku":"169-358   17G","price":39.0,"currency_code":"USD","in_stock":true},{"title":"12G","offer_id":49986423193880,"sku":"169-358   12G","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/452169.jpg?v=1744837951","url":"https:\/\/www.scooterworks.com\/products\/dr-pulley-21x15-sliding-roller-weights-169-358","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}