Apparently there are some exceptions to the 10 x 1 "standard," but I've never seen them. 10 x 1 is a fairly common thread size--rear derailleur mount, many QR axles--so it should be easy enough to check your bosses. Or remove one of the rears, see if it works in the front, and measure the diameter and pitch. (You may want to remove them anyway to strip the paint.)