Replacement front tire for most 200, 300, 400, and 500 series Automowers. This part works with 310, 315, 315X, 430X, 430XH, 450X, 450XH, 520, 520H, 550, 550H, 450X EPOS, 450XH EPOS, 520 EPOS, 520H EPOS, 550 EPOS, 550H EPOS models of Automowers. 
 
Video: How & why you need to replace these tires 
 
For complete caster wheel assembly for 430, 450, 520, & 550 models, click HERE
For complete caster wheel assembly for 310, 315, & 315X models, click HERE