When ordering make sure you know what model year of tractor you have AND make sure you know what style of deck you have. John Deere has begun to supply the style of deck which was previously available on the larger tractors. These are often referred to as 7 Iron style mounts which feature a welded rod for the rear mounts instead of the traditional "C" plate mount. Very critical as the two systems are not compatible. If you are unsure of what you have, send a picture of the deck to me for confirmation.
This new model is essentially the same dolly for the 20 and 30 series tractors with minor differences.
Call us at 712 899 2754 if you have questions.