This mid-weight, high-performance French steel chassis from Motobecane is built with double-butted Vitus 172 tubing, delivering an optimal balance of stiffness and compliance for classic road builds. Weighing in at 2810g (including fork), this frameset represents a reliable foundation for rebuilding or restoring a late 1970s or early 1980s European road bicycle.
Technical Specifications & Frame Sizing
To ensure perfect compatibility with your vintage parts inventory, verify these key measurements:
- Seat Tube (a): 53.5 cm (measured from the center of the bottom bracket to the top of the seat tube)
- Top Tube (b): 55.5 cm (measured center-to-center)
- Rear Hub Spacing: 125 mm
- Total Weight: 2810 g
Condition & Preservation Notes
This is a pre-owned vintage item. The detailed photos are part of the description and display its current physical state, including cosmetic wear, decals, and paint patina from age and storage. No structural cracks or major alignment issues are reported. If you are exploring alternative geometry, you can also view our Bazou steel frameset or check out our dedicated Motobecane touring bike frame for a different geometry setup.
FAQ
What bottom bracket threading does this Motobecane frame use?
As a classic French-made Motobecane frame from this era, it typically features standard French thread (35x1) bottom bracket threading.
What is the rear dropout spacing of this Vitus 172 frame?
The rear spacing is 125mm, making it compatible with vintage 5-speed, 6-speed, or ultra-spaced 7-speed freewheel hubs.
How is the frame size measured on this model?
The seat tube is 53.5cm measured from the bottom bracket center to the top of the seat tube. The top tube is 55.5cm measured center-to-center.
