Sourcing go-kart inner tubes from China

Duty and classification for go-kart inner tubes

Read from the UK Trade Tariff on 30 September 2026, heading 4013 covers rubber inner tubes. Every supplied line carries 0% duty for goods from China, with no anti-dumping or countervailing measures, suspensions or attached import controls recorded in the supplied snapshot. The duty range is therefore uniformly 0%. Import VAT is normally 20%; see UK import duty and VAT.

Treat 4013 90 00 00, Other, as a candidate for go-kart tubes rather than a confirmed classification. The table shows fitment variants under that same candidate line, not separate tariff subdivisions. Send your broker the tube specification, photographs and intended vehicle use, and confirm the commodity code before shipment. For the wider heading, see motorcycle inner tubes.

Specify the tyre, rim and valve together

Identify the kart model, front or rear application, tyre marking, rim dimensions and whether the wheel assembly is designed for a tube. Specify rubber type, tube dimensions, wall thickness, valve construction, stem angle and stem length. Check access for inflation and clearance from the brake, hub and surrounding parts. Do not select a tube from the tyre size alone.

Approve a sample fitted to the intended tyre and rim. Agree inflation conditions, air-retention checks, valve attachment checks and rejection criteria with the factory. For Great Britain, general product safety rules cover products intended or likely to be used by consumers and require safety in normal or reasonably foreseeable use. Keep records identifying your suppliers so the goods can be traced.

Worked duty example

Illustrative example, not a quote: Illustrative order: 1,200 go-kart inner tubes, subject to classification confirmation under 4013 90 00 00, invoiced at £3,500 free on board, with £910 of freight and insurance to the UK. The customs value is £4,410. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £4,410, so it is £882. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Fitment: compare tube markings and dimensions with the approved specification, then fit samples in the intended tyre and rim to check folding, pinching and valve alignment.

Valve: inspect the stem, core and rubber attachment for damage or separation; check inflation access and clearance with the wheel assembled.

Air retention: check for bubbles around the valve and tube joint using an agreed leak-test method, then compare pressure retention under controlled conditions.

Condition and packing: inspect for cracks, thin areas, exposed joins and abrasion; check that packing protects the valves and separates different fitments. Plan checks with our quality inspection guide.

What goes wrong

A tube can match the tyre marking yet fold inside the casing or place the valve against the hub. Pinching during fitting, rough rim surfaces, leaking valve cores and weak valve attachments can cause air loss. Trial the complete wheel assembly before approving bulk production.

Material changes can alter air retention and flexibility while the markings remain unchanged. Retain the approved sample and specification, compare incoming batches, and isolate leaking or damaged stock while investigating the cause.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.