mx class for 85 expert

well it really depends on which organization you race with. Most will not allow the big wheel in the regular 85 class. its too much of an advantage. some org's allow it in the beginner classes but not age classes. you will need to check your rule book...you can buy new wheels and drop them on your bike. your swingarm is longer but the smaller wheels work fine.

here they are allowed in 85 beginner and 85 open but not in the age classes. they are also allowed in supermini and schoolboy.