Originally Posted by jonestr

I would go 15 or 17 as then you will get the most skid patches and have the longest rear tire life. If you are into skidding that is. If you like that saddle stick with it, but that is one of the first things I changed on my pista. I also got a different bar, but a better drop bar not a flat bar.

Hope you enjoy your new neuter (get it? I am not very clever.)