When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The size of the sprocket depends on if you want more down low power or higher top speed. At your weight you could add a tooth to the rear sprocket from stock. Larger tires will increase top speed and smaller tires will decrease top speed.