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GST-279 full-suspension frame

Printed lugs on carbon tubes with a rocker-driven coil shock, from my Fusion model to printed jig plates and both triangles.

Date: Feb 2026
Media: 17 photos · 1 video
Software: Autodesk Fusion
Disciplines: BikesCAD3D Printing

Fig. 01The front triangle: printed lugs on carbon tubesEnlarge

Notes

GST-279 is a full-suspension frame of printed lugs on carbon tubes, which I modelled in Autodesk Fusion. A rocker link drives a coil shock, and the chain runs around idler pulleys. Section views show how the carbon tubes slot into the lugs and how a pivot's bearing sits in its housing.

An earlier mock-up put printed lugs in blue, white and grey on carbon tubes. A head tube lug with two round sockets was printed in yellow and in dark grey, a lug was set up for printing with supports, and red printed jig plates bolt onto the junctions.

The front triangle has grey printed lugs on carbon tubes. In the rear triangle, carbon seat stays joined by a printed yoke meet red tubes at printed dropout ends.

Photos and video

17 figures

Fig. 02GST-279 in Fusion: lugs on carbon tubes, a rocker link and a coil shock

Fig. 03The rear end: rocker link, coil shock, and the chain path around idler pulleys

Fig. 04Close-up render of the seat tube junction and pivot bearings

Fig. 06Section view of a lug where two carbon tubes slot in

Fig. 07Section view through a pivot housing and its bearing

Fig. 08A lug set up for printing, with supports

Fig. 09An earlier mock-up: printed lugs in blue, white and grey on carbon tubes

Fig. 10A head tube lug with a round head tube and two round sockets, printed in yellow and in dark grey

Fig. 11The dark grey head tube lug with red printed pieces fitted in both ends

Fig. 12A printed junction and its two red printed jig plates

Fig. 13A printed junction held in a red printed jig

Clip 0:05

Fig. 14On the bench: a junction in its jig plates, then along the carbon tubes to the dark grey head tube lug