SRM ORIGIN 24 User Manual

USER GUIDE FOR 24MM SPINDLE SRM ORIGIN ONLY
PowerMeter installation
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 -
Other manufacturers - 8 - 10Nm (check manufacturer specifications)
• The drive-side crankarm comes pre-installed at the correct torque specification.
Do not loosen the pinch or crank bolt on the drive-side crank! Doing so may result in damage to the product
which could result in injury or death.
PowerMeter Installation
Failure to observe the proper torque specifications can result in damage to the product which can result in
injury or death.
• Ensure frame has a suitable 24mm bottom bracket installed when mounting the SRM ORIGIN 24mm
PowerMeter. Compatible bottom brackets can also be purchased from SRM authorized dealers or our online
shop at: www.SRM.de.
• Install bottom bracket per manufacturer's instructions, ensuring sealing rings are placed properly and bearings
are fully seated and concentric in frame.
• Apply a small amount of grease to the contact surfaces of the bearing/axle before installing drive-side crank.
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 the non-drive side bottom bracket does not come loose or come out of the BB shell.
• Install the Ø22 x 3mm o-ring on the non-drive side before adding the crank reducer (Fig. 1).
• Apply grease to axle and install non-drive crank reducer till it contacts the o-ring (Fig. 2). Next install the non-
drive crank, making sure that the crank is rotated 180 ° to the drive-side crank arm. Slits in the reducer and
non-drive crank MUST be aligned (Fig. 3).
• Apply a light thread locker (violet) to the threads of the 10mm axle bolt and tighten counterclockwise
(left-handed thread) slightly with a 10mm Allen key (Fig. 3) until the spacers touch the o-ring and the
crank is free of axial play.
Excessively high tightening forces can bring lateral pressure to the bearing and lead to increased bearing wear
and possibly damage the bottom bracket over time.
• Unscrew the 3mm non-drive side crank pinch bolt and place a small drop of light thread locker (violet) on the
threads. Center barrel nuts in crank and torque to max. 4-5Nm (Fig. 4.1). Ensure barrel nuts remain centered in crank while torquing 3mm pinch bolt.
• Tighten the 10mm left axle bolt counterclockwise (left-handed thread) with a torque of 5Nm (Fig. 4.2). 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. 6).
Insert the Tri-lobe nut from the backside. Make sure the holes of the washer and nut are concentric with each other.
• Repeat the installation process with the Tri-lobe nut marked "L" on the Non-Drive side crank arm (Fig. 7).
• Tighten the pedals with the recommended torque: 20 - 40Nm (Insufficient torque could allow pedal to come loose, possibly causing damage to crank-arm, injury or death).
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!
DRIVE-SIDE
RH THREAD 20-40Nm
24
I NOTICE
12Nm
I WARNING
WARNING
I
I NOTICE
FIG. 5
WARNING
I
FIG. 6
O-ring
NON-DRIVE SIDE
NON-DRIVE SIDE
1. 2.
NON-DRIVE SIDE
NON-DRIVE
LH THREAD 20-40Nm
EN
FIG. 1
FIG. 2
FIG. 3
FIG. 4
FIG. 7