Rolly Kid John Deere 6920 Specification.. This tractor has a three position adjustable seat. For ages 3 plus. The trailer is not supplied with this tractor, please refer to product code 12/295/0 if you would like to purchase it seperately Mechanical features include a strong 12mm thick rear axle, covered integral fixed wheel chain drive, a pedal crank with eccentric bearing chain tensioning system and anti slip pedals,and a heavy duty front axle with suspension.