20” x 1 1/8” - 1 3/8"
A= Internal Diameter (when eyelets, then eyelets to eyelets): 423mm
B= Rim Thickness (when eyelet, includes eyelet): 2mm
C= ERD: 427mm
 
20” x 1.50"
A= Internal Diameter (when eyelets, then eyelets to eyelets): 381mm
B= Rim Thickness (when eyelet, includes eyelet): 2mm
C= ERD: 385mm

20” x 1.75" 
A= Internal Diameter (when eyelets, then eyelets to eyelets): 378mm
B= Rim Thickness (when eyelet, includes eyelet): 2mm
C= ERD: 382mm
 
24” x 1.75"
A= Internal Diameter (When eyelets, then eyelets to eyelets): 482mm
B= Rim Thickness (when eyelet, includes eyelet): 2mm
C= ERD: 486mm