2
40 Tooth Ratio Expander
1 3 4
5 6 7
FITTING INSTRUCTIONS
INSTRUCTION MANUAL
www.hopetech.com
ISS 02 - 03/2014
HOPE TECHNOLOGY Hope Mill Barnoldswick Lancashire BB18 5PX United Kingdom
40T-REx SH
Outer (drive-side) face shown
40T-REx SR
Compatible with:
Shimano XTR CS-M980 11-36
Shimano XT CS-M771-10 11-36
Compatible with:
SRAM X5 PG-1030 11-36
SRAM X7 PG-1050 11-36
SRAM X9 PG-1070 11-36
Before you start, ensure that
your rear derailleur has
sufficient tooth capacity to
cover the increased range of
gears (see note 1) and that you
have a compatible 10 speed
cassette.
Separate the individual
sprockets whilst being
careful to keep any
spacers in their intended
locations.
Remove the individual
sprocket that you wish
to discard from the
cassette and the
adjacent spacer (see
note 2).
Unscrew the lock ring and remove
existing 10 speed cassette from freehub.
If you are adapting a cassette that has
previously been used ensure all sprockets
and spacers are fully cleaned prior to
re-assembly.
Note 1: For a 1 x 10 set-up with a newly converted 11-40 cassette you will need a rear derailleur with
a 29T capacity [ 40-11=29 ].
Note 2: In most cases we recommend removing the 17T sprocket. In the case of the Shimano
CS-M980 and CS-M771-10 this is the only sprocket that can be easily removed. In the case of the
SRAM PG-1030, PG-1050 and PG-1070 it is possible to remove alternative individual sprockets.
Note 3: If your B-tension screw is not long enough use the supplied M4 x 20mm screw. Refer to the
manufacturer’s instructions for further guidelines on adjusting your rear derailleur.
Note 4: With the chain mounted on your largest front chainring and the 40T-REx sprocket, check that
your chain is not being pulled tight. If your chain is not long enough, replace it with a new longer one.
Slide the 40T-REx sprocket onto the freehub
taking note of the spline location. No additional
spacers are required.
Assemble the existing cassette (minus
one sprocket) onto the freehub. Fit the
lock ring and tighten to the manufacturers
recommended tightening torque.
With the chain on the 40T-REx
sprocket, adjust the B-tension
adjustment screw on your rear
derailleur so that the top guide pulley
sits close to the 40T-REx but
doesn’t touch it (see note 3). Ensure
that your chain is of sufficient length
to cover the increased range of
gears (see note 4). Finally, shift
through the full range of gears whilst
turning the pedals to check that
there are no problems. Your 10
speed cassette with expanded ratio
is now ready to ride.
CLEARANCE
B-SCREW
(39 pages)
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