EN
USER GUIDE
PowerMeter installation
NOTICE
It is recommended that you have the SRM PowerMeter installed by an authorized dealer. To locate an SRM
authorized dealer visit our website at www.SRM.de. Do not use a mallet to install the PowerMeter as this
can damage the electronics which is not covered under warranty.
Inspection before installation
• Please check that the chain catcher pin of the big chainring aligns with the drive-side crankarm.
•
Make sure the chainrings sit flat and tight on the 110mm BCD (bolt circle diameter) of the PowerMeter.
•
Check chainrings bolts of the SRM ORIGIN PowerMeter are torqued to the correct specifications:
Shimano chainrings -
12Nm
Other manufacturers -
8Nm
(check manufacturer specifications)
•
The drive-side crankarm comes pre-installed at the correct torque specification.
WARNING
Do not loosen the pinch or crank bolt on the drive-side crank! Failure to do so may result in damage to the
product which could result in injury or death.
PowerMeter Installation
WARNING
Failure observe the proper torque specifications can result in damage to the product which can result in
injury or death.
•
Ensure frame has a suitable 30mm bottom bracket installed when mounting the SRM ORIGIN PowerMeter.
Compatible bottom brackets can also be purchased from an SRM authorized dealers or our online shop at:
www.SRM.de
.
•
Install Bottom Bracket per manufacturers instructions, ensuring sealing rings are placed properly and bearings
are fully seated and concentric in frame.
•
Determine the required spacers for the Drive and Non-Drive side according to your bottom bracket type - check
table (Fig. 11).
•
Install the corresponding spacers onto the drive side axle (Fig. 1) and apply a small amount of grease to the
contact surfaces of the bearing/axle. Due to tight tolerances the axle/bottom bracket can be difficult to install
if not inserted straight. Carefully align the spindle with both bearings and with a slight rocking motion use light
pressure to fully seat crank in the bottom bracket. Make sure that the Non-Drive Side bottom bracket does not
come loose or even come out of the BB shell.
•
Remove the excess grease from the non-drive side of the crank axle and position the appropriate spacers
according to the table (Fig. 11). When installing the non-drive crank, make sure that the crank is rotated by
180 ° to the drive-side crankarm.
•
Apply a light thread locker (violet) to the threads of the axle bolt and slightly tighten with a 10mm allen key
(Fig. 2).
NOTICE
Make sure that the axle bolt is only slightly tightened till the spacers touch the bottom bracket and the
bottom bracket is free of play. Excessively high tightening forces can bring lateral pressure to the bearing and
lead to increased bearing wear and and possibly damage the bottom bracket over time.
•
Unscrew the non drive side crank bolt counterclockwise and place a small drop of light thread locker (violet) on
the threads. Re-torque the bolt to
max. 5-6Nm
(Fig.3.1).
•
Tighten the left axle bolt counterclockwise with a torque of
5Nm
(Fig.3.2).
• Let the thread locker cure for at least 6 hours before use!
Pedal installation / Choose crank length
•
The crank length can get adjusted from 170, 172.5 to 175mm. Make sure you select the correct crank length!
•
Degrease and clean the Tri-lobe nut, Tri-lobe washer and the contacting crank surfaces. Dust and/or any other
particles on the Tri-lobe nut or on the crank could damage the crank or the pedal threads.
• Make sure to use the correct Tri-lobe nut marked with “
R
“ when installing the Drive-Side pedal (Fig. 5).
•
Position the arrow on the Tri-lobe washer facing the marking of the desired length. Make sure the washer is
aligned correctly and sitting flush inside the crank (Fig. 4). Insert the Tri-lobe nut from the backside. Make sure
the holes of the washer and nut are concentric with each other.
•
Proceed accordingly with the Tri-lobe nut marked with “
L
“ on the Non-Drive side crankarm (Fig. 6).
•
Tighten the pedals with the recommended torque:
20 - 40Nm
(check pedal manufacturer specifications).
WARNING
Failure to observe the correct torque specification can result in damage to the product which can result in
injury or death. Danger of accident due to failure of the crank system due to loosened screw connections.
Check the correct torque specifications of all screw connections after the first 100km ride and then at regular
intervals of 2.500km. If necessary, re-tighten the screws and/or replace thread locker if necessary!
PowerMeter
PM-SRM-VAR-AXL-SH4-110-010
FIG. 4
FIG. 5
FIG. 1
FIG. 6
FIG. 3
1.
2.
FIG. 2
