Ball-bearing ring or bottom bracket compatible with the crankset of various vintage mopeds, in which the bearing cups (sockets) are pressed into the frame.
Compatible with the following 50/2 and 503 models, among others: Alpa Kristall, Alpa Oltenia, Alpa Sport, Alpa Tornado, Caravelle, Comet, Eiger, Goericke, Hercules Prior, Pony Junior, Rico, Rixe, Walco, as well as Puch X30 Pionier and Tigra mopeds.
Outer diameter: approx. 35 mm
; Inner diameter: approx. 22 mm
; Ball diameter: 1/4" (6.35 mm)
A nostalgic product from the premium swiing® brand that meets the highest standards.
| Bearing type | Bearing ring |
| Ø ball [inch] / [mm] | 1/4" (6.35 mm) |
| Manufacturer | swiing® revival parts |
| Ø inside | 22 mm |
| Ø outside | 35 mm |
| Puch |
| Sachs |
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