Yes they are. But... The front axel has bigger outer Knuckles and uses a larger diameter rim on the front. this also gives better stability when using the loader. Retrofit back wards work better. I am told the the fronts off the earlier models will fit the BX24/ 50 & 60 series, but the clearance will be close. Needs to be a really good deal for the potential aggravation. A new set of tires mounted with the proper rim size from a good dealer $300-350.