The new variator HI-SPEED EVOLUTION is a true masterpiece of technology and research. Variator supplied with two sets of rollers da 12 gr. and 14 gr. In the HI-Speed Evolution kit you will immediately notice the fixed semi-clean and the mobile semi-cleaning "Air Speed" designed with different degrees to allow the strap to increase the travel. The contrast spring, complete with the Evo Slider anti-torsion system, has an increased load of 34%. Always 2 le series of rollers inside the package with a light più weight The patented lubrication system is capable of exciting yields and performance, without ever giving up maximum reliability. Cemented, hardened, rectified chrome nickel special steel bushing. SI is distinguished by the large internal bag with function of grease tank inside which is positioned a special spring that allows a constant distribution of grease on the plug even pithe conditions of use heavy ù. The guide is da thrill thanks to these features; it piacceleration and speed within everyone's reach. PRODUCT 100% MADE IN ITALY