Tap here to read more about Wheel Tire Assembly For Exmark Radius S-Series / Radius E-Series 48″ 52″ 60. Premium Quality Replacement Part. Wheel Tire Caster Assembly. Compatible with Exmark Models. Quest X-Series Zero-Turn Mower: QZX735GKC48300 – 48, Koh. ZT720 (SN: 402082300 – 404314158) (2018) RAE720CKC48300 – 48, Koh. FX651 (SN: 411294212 – 413950473) (Rev A) (2022) RAS691GKA523A3 – 52, Kaw. ZT710 (SN: 400000000 – 402082299) (2017) RAS720CKC52300 – 52, Koh. ZT720 (SN: 400000000 – 402082299) (2017) RAS720GKC52300 – 52, Koh. ZT720 (SN: 400000000 – 402082299) (2017) RAS730GKA603A3 – 60, Kaw. FX730 (SN: 411294212 – 413950473) (Rev B) (2022) RAS730GKA60RA3 – 60, Kaw. 1 x Caster Wheel. Width: 223.5mm – 8.8 in. Inner Diameter: 20.5mm 0.8 in. Outer Diameter: 330.2 – 13 in.