Inner Tube Weight Calculation Guide — Woven Bag vs Carton Packing Volume

Most exporters calculate outer tire volume but completely forget to account for inner tube space — which can be 8–15% of total container capacity for motorcycles with TT (tube-type) tires. Here's the essential guide to getting tube volume right.

Calculating Inner Tube Volume by Woven Bag Weight (Most Common Method)

When your supplier packs tubes in woven bags:

• Enter the net weight per woven bag (usually 15–25 kg depending on tube size)
• Our calculator uses industry-standard bulk density tables to convert weight → volume
• Typical conversion: ~0.3 cbm per 100kg of woven bag-packed tubes

Calculating Inner Tube Volume by Carton Dimensions (Alternative Method)

When your supplier ships in cardboard cartons:

• Enter carton dimensions (Length × Width × Height in cm)
• Enter pieces per carton (usually 50–200 pcs depending on spec width)
• The calculator handles carton stacking volume with standard pallet gaps

Why This Matters

For a typical TT motorcycle tire lot of 8,000 outer tires: tubes ≈ 8,000 units × 1.2kg avg = 9,600 kg

• Woven bag-packed volume: ~2.9 cbm — that's 4.3% of your 40HQ container!
• Carton-packed volume could be up to 3.5–4.0 cbm (larger due to empty carton space)

Key takeaway: Always track inner tube weight separately from outer tire calculations in our loading plan tool — don't approximate!