A 120 is too wide for the 3" front wheel. Back in around '95 when I got my Fizzer the previous owner,the "Racin' Mason",had a 110-17 radial on the front and a 150-18 Metzeler Comp K bias-ply on the rear.Seemed to work fine.The Metzeler was pricey,though.Eventually a 150-18 radial beca...