Spherical collar bolt, M12 x 1,5 x 25 mm across flats 19
The spherical-seat bolt is a wheel bolt for fixing wheels with spherically countersunk rim holes. The spherical seat centres the wheel on the hub and transmits the clamping force to the rim.
Before replacing, compare the thread, shank length and seat shape with the existing bolt; bolts with a conical seat do not fit rims with a spherical seat. Tighten wheel bolts crosswise to the specified torque and retighten after the first few kilometres.
- M12 x 1,5 x 25
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