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5. TROUBLE SHOOTING
5.1 TROUBLE SHOOTING HUBS
Problem
Reason
Solution
Freewheel is blocked
Spacer was forgotten during
assembly.
Check correct assembly:
Ratchet hub: “Overview”, page 14.
Ratchet EXP hub: “Overview”, page 20
Spacer was compressed by
overtightening the thru axle.
Measure the length of the spacer. If the
spacer is shorter than 15.4 mm, it must be
replaced.
Freewheel does not engage /
slips
One or both ratchets are
mounted upside down.
Check correct assembly:
Ratchet hub: “Overview”, page 14.
Ratchet EXP hub: “Overview”, page 20
Too much or wrong grease
on the ratchets.
Clean and grease ratchets.
Ratchets are worn.
Replace ratchets.
One or both springs were
forgotten during assembly.
Check correct assembly:
Ratchet hub: “Overview”, page 14.
Ratchet EXP hub: “Overview”, page 20
Hub has axial play
Ball bearings were not
mounted correctly.
Check correct assembly:
Ratchet hub: “Overview”, page 14.
Ratchet EXP hub: “Overview”, page 20
Ball bearings are worn out.
Replace ball bearings.
Hub rotates stiffly
Ball bearings are worn out.
Replace ball bearings.
Ball bearing non drive side
too tight.
Check correct assembly:
Ratchet hub: “Overview”, page 14.
Ratchet EXP hub: “Overview”, page 20
Mounting sequence of the
ball bearings not observed.
Hub makes noise
Ball bearings are worn out.
Replace ball bearings.
Notches from the cassette on
the freewheel body.
The steel cassette works
itself into the alloy web of
the freewheel body.
Remove bad notches on the freewheel body
using a file.
Freewheel body rotates with
difficulty.
Ball bearings in the
freewheel body are worn
out.
Replace freewheel body.
Freewheel is too noisy / too
quiet.
The perception of the freewheel sound is very subjective. While some
riders prefer a loud freewheel sound, other riders want a quiet freewheel.
In principle, the freewheeling sound can be influenced by the amount of
grease between the ratchets. Less grease increases the freewheeling
sound, but at the same time leads to higher wear.
