Bottom bracket shells with the corresponding bearing rings, compatible with various vintage mopeds such as Alpa Kristall, Oltenia, Sport, Tornado, as well as Sachs Caravelle, Comet, Eiger, Goericke, Hercules Prior, Pony Junior, Rico, Rixe, and Walco with 50/2 or 503 engines.
The set consists of the following parts:
Left
threaded cup, right
threaded cup, lock ring
, 2 ball bearing rings 1/4"
Thread diameter: 34.5 mm
; Inner diameter of bearing cups: 30 mm
You can find the complete set with the axle in the accessories section.
A good, affordable standard replacement part. GPO – GOOD PARTS ONLY.
| Bearing type | Bearing ring |
| Manufacturer | GPO |
| Material | Steel |
| Surface | galvanized (blue) |
| Color | silver |
| Ø ball [inch] / [mm] | 1/4" (6.35 mm) |
| Ø inside | 30 mm |
| Universal |
| Sachs |
| Hercules |
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