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REPLACING YOUR DRIVE ROLLERS
When you first start riding, the HyperRim’s rubber rollers may be stiff and cause the rim to slip. But
the rollers will soften after a few rotations and will impart the proper rim grip. The rubber rollers may
melt or wear from excessive heat over longtime use.
The rim-drive rollers will eventually wear and need to be replaced. When you find that your load force
has diminished significantly or that you feel some vibration that cannot be fixed through minor adjust-
ments, then it is time to invest in a “roller replacement set”. This set is available from your Minoura
dealer.
Directions
1
2
3
!
4
!
Drive pulley
Rubber roller
Plastic shaft
Under pulley
cover
(Fig. N)
(Fig. O)
(Fig. M)
To remove: Apply a 10mm wrench to the nut behind the pulley while
turning the bolt with a M4 hex wrench.
(see Fig. M)
If you are changing the roller on the Mag unit (left) side,
go to step 3.
To change the roller on the assistant-roller-unit (right) side, pull back
the pulley and remove the rubber roller.
To remove the pulley on the Mag Unit (left) side, you must loosen
the two bolts that are located on the surface of the Mag unit with a
M4 hex wrench.
Push the Mag unit in the direction of the drive roller to loosen the
V-Belt and then pull out the pulley.
(see Fig. N)
Do not remove the bolts that control the
tension on the V-Belt.
Be sure to replace both rollers at the same time
to prevent uneven wear to the rim and to ensure
a more balanced ride.
As you did with the right-side roller in step 2, pull out
the rubber roller from the pulley.
(see Fig. O)
