Detailed introduction to inner tube for motorcycle tyre:

Sizes:
1.85-17
(50/90-17)
2.00-17
2.25-17
2.50-16
2.50-17
2.50-18
"2.75-14
(80/90-14)"
2.75-17
2.75-18
2.75-21
3.00-8
3.00-10
3.00-16
3.00-17
3.00-18
3.25-8
3.25/3.50-16
3.25/3.50-18
3.50-8
3.50-10
3.75-19
4.00-8
4.00-12
4.10-18
4.50-12
110/90-16
Packing: 1PC/polybag, then 50 polybags/PP woven bag, 20GP: 39000PCS.