I have two 520 (16/45)Conversion kits for sale, one has about 20 miles on it, the other is brand new, opened but never mounted. I will ask 150 bucks for the used Vortex Kit/DID Gold Chain, and 220 for the all black RRP kit/DID Gold Chain (16/47)that was never mounted. Since I dont do the whole paypal thing, send me a money order with tracking info and I will then release the parts. If you need some kind of ID verification of who I am I can do that since I know I havent been on the forum long. Selling because I bought RC Component Wheels and they require some special sprocket from RC, so thats what they say. Let me know.