Have a f109, need to put rubber tires on. I need rims and tires. Who has them in the U.S.? And does the f104 tires fit the f103 rims? race on carpet, so need help. I put f104 on it and the front is too wide, wider thsn the rear. the front is about 8 in wide, and the rear is about 7 in wide. I need a lot of help. Do you have any set up help on carpet for the rubber tires? Thanks, floyd.