Laminated Tyre Complete Assembly specification:-

The size of tyre is 4 x 8 x 15 

Tyre Outer Dia – 15 inch
Tyre Bolt – 1 inch
Tyre Width – 4 inch
Tyre Rim – 8 inch with 4 hole
Hub Width – 5-1/4 inch
Hub Bolt Circle  Diameter – 5 inch
Hub Bush Hole Diameter – 1 inch
4 pcs Stud With lock Washer – ½ inch
Fork Material – 3 inch x ½ inch flat
For Rod Dia – 1.25 inch
Axle – 1 inch With castle nut made of EN8 grade
Tyre Bolt – 1 inch
Weight – 18.20 kg
Dowel Pin – 10 mm thickness – 2.5 inch long
Split Pin – 3.5 mm thickness 70 mm long
Washer – 3 mm , Thickness ID-33 mm , OD -56 mm