✅ Polini swingarm bearing set - for Vespa single-sided swingarms from 1984 onwards

The Polini swingarm bearing set is the perfect solution for overhauling the bearing between the steering tube and front swingarm on Vespa and Piaggio models with a single-sided swingarm. It is precisely at this point that enormous forces act from all directions - an intact bearing is essential for safe and precise wheel guidance.

The connection transmits the steering impulse directly to the front wheel and is therefore also TÜV-compliant. The bearings are fixed in place with pressed-in locking cramps. The bearing bolt is permanently installed in the steering tube, runs on needle bearings in the aluminum swingarm and is reliably sealed by O-rings and V-rings.

If the seals become brittle due to ageing, water can penetrate and destroy the needle bearings in the long term - an overhaul is then unavoidable.

Scope of delivery:
Complete bearing set for connecting the swing arm and head tube - suitable for all Vespa/Piaggio models with single-sided swing arm from 1984 onwards.

Technical data:

  • ✅ Bearing bolt Ø: 16 mm
  • ✅ Bearing bolt length: 56 mm
  • ✅ Outer Ø of the bearings: 22 mm
  • ✅ Including O-rings, V-rings and safety cramps
  • ✅ Suitable for all Vespa / Piaggio models with single-sided swingarm from 1984 onwards
  • ✅ Installation with a powerful press recommended

This bearing set ensures precise steering behavior, reliable sealing and maximum safety - ideal for everyday use, restoration or MOT preparation.

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OEM numbers (for comparison purposes only)
Piaggio:
137146, 177451, 198513, 1C001985
Polini:
178.3504, 1783504, P178.3504, P1783504
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