Gosh this brings back memories TRF practice days out on my gas gas fe450 running golf balls as a experiment in the front wheel on a YZ250 they worked for awhile solid dog balls worked better We all couldn't afford mooses back then lol falling off my ccm 560 and breaking my foot you don't forget that stuff And having a hoot on a RM125 And demo recalling the top boys and girls landing half way down deers leap stopping it for corner at the bottom Whiteway Barton Kingsteignton