This frame is designed to used with the following part sizes.
26" rear wheel with 26" x 2.125" tires
26" straight or bent springer fork
25.4mm (1") seat post
bottom bracket with 2" diameter cups, this is the standard size 

• Frame Size: Length: 40 1/2
• Height: 19 1/4
• Clamp: 28.6mm
• Head Tube Size: Length: 102mm ID:32.5mm
• Material: Steel
• Brand: Lowrider