The Jig

The Jig is designed to meet the needs of prototyping and small scale production. It is very simple and inexpensive compared to professional framebuilding jigs. The total cost is around 300 EUR/USD. Unlike cheap jigs, such as the Jiggernaut, this jig is does not burn or take up moisture.  It also accepts any tube shape and size. Aluminium profiles form a large part of the costs, but they are very sturdy, tolerate heat and moisture (unlike wooden jigs) and can be used for something else, too. The aluminium profiles can be sourced separately and the custom fittings ordered on this page. We have made a complete instructable for those who want to build a similar jig, but several improvements have been made since then and everyone buying the fittings will get a 20-page instruction manual how to build and use the latest version of the jig. The version we sell currently is version 3. Improvements from the original instructable are:

  • Easy adjustment of steering angle non-parallel to seat tube
  • Different configuration for improved rear dummy axle rigidity. This was a major design flaw in the original design leading to possible misalignment of the rear dropouts and hence the rear wheel would not sit straight. Version 3 mended this.
  • Easier measurement of rear spacing
  • Detailed user manual
  • Reduced cost of aluminium profiles without loss in functionality
  • Higher accuracy for the trigonometric calculations
  • Improved spreadsheet
  • Wider (73/92 mm) BB shells easy to use

The fittings kit includes:

  • Head tube fittings (all external cup and zero stack standards)
  • Bottom bracket fittings for BSA68/73, PressFit86/92, PF30 68/73 mm wide, BB386/BB30, BBright and T47 are included as standard
  • Seat tube fitting (all sizes)
  • Plastic gauge blocks for moving the centerline to accommodate wide BB shells
  • Detailed instructions how to assemble the jig and use it for framebuilding. The design has been updated since writing the instructable and it’s even more simple now
  • Improved spreadsheet for easier and more accurate calculations

The kit costs 129 EUR including shipping within the EU. Outside the EU we have to charge 30 EUR extra shipping costs, unfortunately. The fittings are CNC machined from 7075-T6 aluminium alloy and use M8x1.25 metric thread for fastening to the jig. Please use the order form below or drop us an e-mail if you are interested. We accept PayPal, major credit cards and wire transfer.

UPDATE: We have 35 sets in stock.

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