Dr. Pulley ---- UNIQUE Sliding Roller Weights US PAT. 7276004
 
<<<
* NO abnormal wear!
* Same high gear ratio always!

>>>
* Abnormal wear easily occurs
* High gear ratio fade away
Traditionally, gear ratio is changed by the up-and-down rolling movement of the roller weights in the ramp of MDF;
Now the innovative Dr. Pulley Sliding Roller Weights “slide” up and down in the ramp of MDF to change the gear ratio. 
This unique “sliding movement” (Not rolling!!) provides exclusive advantages to make CVT perform excellently:
<< No abnormal wear will occur, even when Dr. Pulley Sliding Roller Weights work in the high gear position. (See pictures below)



<< Enjoy the broaden range of gear ratio --You never see it before!
<< Outstanding acceleration and re-acceleration properties. (See table below)
<< Both take off explosively and reach highest top end speed.
<< Extended life with excellent CVT variator performance.