Import Bicycle Down Tube — Buy in wholesale FOB from Supplier in Taiwan

AL 6061 aluminium alloy bicycle down tubes from Thai Shun Industrial Co., Ltd serve as the primary structural member connecting head tube to bottom bracket in diamond-frame bicycle construction. The AlMg1SiCu alloy designation confirms magnesium, silicon, and copper additions that enable precipitation hardening to the T6 temper, with typical yield strength of 276 MPa and density of 2.70 g/cm³. Thai Shun processes these tubes through tube expansion, bending, and stamping operations to achieve the geometries required by frame builders serving mountain bike and road bike markets. The supplier notes custom diameters and lengths are available, though exact dimension tables are not published in the listing.

Tube expansion increases diameter for head tube or bottom bracket junction fitment while maintaining controlled wall thickness, a process requiring lubricated mandrel work to avoid galling on aluminium. Bending operations employ mandrel or rotary draw methods to achieve the shallow curves common in modern frame geometries without wall wrinkling or collapse. Stamping creates cable routing holes, bottle cage mounts, or internal routing ports, demanding tight positional tolerances to ensure component compatibility. The AlMg1SiCu composition provides natural atmospheric corrosion resistance, though frame builders typically apply chemical conversion coating or anodising before paint or powder coat application.

This component targets bicycle OEMs, aftermarket frame builders, and component distributors who require weldable, lightweight tubing with established fatigue characteristics. The down tube's length and diameter directly influence frame torsional stiffness and ride characteristics, making specification accuracy critical. Buyers must confirm whether Thai Shun supplies heat-treated T6 condition tubes or requires customer-side aging, as this affects weld zone properties. Trade terms referenced in the source include FOB and CIF, though specific port, minimum quantities, and pricing require direct negotiation with the supplier given the lack of published figures.

Thai Shun Industrial Co., Ltd

Taiwan🚢 Voyage

4.5(86)

Thai Shun Industrial Co., Ltd is based at 1F., No. 46, Kaiyuan Road, Dajia District, Taichung City, in the heart of Taiwan's bicycle component manufacturing region. The supplier profile indicates organic tier status and voyage trust tier, with a response rate of 0.00 percent and no recorded average response hours. This suggests limited reliance on platform-based enquiry management, directing serious buyers toward direct outreach to their Taichung address or confirmed contact details. No information is provided about establishment year, ownership structure, or production floor capacity.

The company emphasises capabilities in tube expansion, bending, and stamping alongside the drawing and hydroforming processes mentioned in their related listings. No workforce size, annual turnover, major client names, or factory certification details appear in the available profile. The listing references flexible minimum order quantities and favourable shipping terms, though no numerical values are stated. Buyers should independently verify production capacity, existing customer base, and quality management system status before committing to volume orders. The Dajia District location provides access to Taichung's logistics infrastructure and the dense network of upstream aluminium suppliers and downstream bicycle assemblers in central Taiwan.