20” x 1 1/8” 
A= Internal Diameter (when eyelets, then eyelets to eyelets): 426mm
B= Rim Thickness (when eyelet, includes eyelet): 3mm
C= ERD: 429mm
 
20” x 1 1/8” - 1 3/8"
A= Internal Diameter (when eyelets, then eyelets to eyelets): 421mm
B= Rim Thickness (when eyelet, includes eyelet): 3mm
C= ERD: 427mm
 
20” x 1.75"
A= Internal Diameter (when eyelets, then eyelets to eyelets): 384,4mm
B= Rim Thickness (when eyelet, includes eyelet): 3mm
C= ERD: 387,6mm

20” x 1.75" OS
A= Internal Diameter (when eyelets, then eyelets to eyelets): 428,4mm
B= Rim Thickness (when eyelet, includes eyelet): 3mm
C= ERD: 429,6mm
 
24” x 1.75"
A= Internal Diameter (When eyelets, then eyelets to eyelets): 468,4mm
B= Rim Thickness (when eyelet, includes eyelet): 3mm
C= ERD: 487,6mm