We supply replacement rubber tracks for the John Deere CT 329-E series compact track loader. We have tread pattern options and tread width options for each type of working environment. We typically stock multiple tread pattern options for your tracks and potentially alternate width options depending on your job site requirements. Please call us if you have any questions concerning your John Deere CT 329-E track loader parts. If you are asking what size rubber track fits the John Deere CT 329-E series, 450 x 86 x 56 is the eighteen-inch wide rubber track for the John Deere CT 329-E series. The same track fits the CT-329-D model.