teeth

Fagan & Baron...1299sl 6Ufcb14d3ug

Hi I've had my 1199 for 2 years and it's time for a chain and sprocket up grade. I don't want to keep the stock 15t front and 39t rear configuration and will prob go for a 520 as I only ride track but was wondering what configuration others have gone for for track riding and have you needed...