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Mandrel-drawn tubes for the seat tube of a bike frame, 4130 CrMo. Tapered tubes make for a pretty stout bike and are similar to what some Bassi bikes use.
All dimensions in millimetres. Sections column states initial length/~remaining length.
See here for other main tubes.
| Outer Diameter | Wall thickness | Max. Length | Butt sections |
| 34.9 | 1.6 - 1.0 | 450 | 80/~ |
| 34.9 | 1.6 - 1.0 | 500 | 80/~ |
| 34.9 | 1.6 - 1.0 | 550 | 80/~ |
| 34.9 | 1.6 - 1.0 | 600 | 80/~ |
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Review Seat Tube - Single butted CrMo
