MRP G3 Steel User Manual

USER MANUAL

IMPORTANT CONSUMER SAFETY INFORMATION

WARNING: RIDING A BIKE IS DANG EROUS. NOT PROPERLY MAINTAINING OR

INSPECTING YOUR BIKE AND ITS COMPONENTS IS EVEN MORE DANGEROUS.

IT IS ALSO DANGEROUS TO NOT READ AND FOLLOW THESE INSTRUCTIONS.

1. DO NOT PERFORM ANY MODIFICATIONS OR ADJUSTMENTS THAT ARE NOT OUTLINED
IN THIS MANUAL.

2. INSPECT YOUR CHAIN GUIDE BEFORE EVERY RIDE. INSPECT AREAS FOR ANY SIGNS
OF EXCESSIVE RUBBING, BEN DING, CRACKING OR OTHER DAMAGE. IF YOU NOTICE
ANYTHING ABNORMAL, DO NOT RIDE IT. RETURN IT TO YOUR DEALER OR CONTACT MRP
FOR A COMPLETE INSPECTION AND NECESSARY REPAIR.

3. MRP RECOMMENDS THAT YOU WEAR PROPER SAFETY EQU IPMENT EVERY TIME YOU
RIDE, INCLUDING APPROVED BICYCLE HELMET. NEVE R RIDE AT NIGHT WITHOUT LIGHTS.

4. ALWAYS USE GENUINE MRP PARTS. USE OF AFTERMARKET REPLACEMENT PARTS AND
UPGRADES VOIDS THE WARRANTY AND COULD CAUSE STRUCTURAL FAILURE.

MRP HIGHLY RECOMMENDS THAT YOU HAVE YOUR NEW GUIDE INSTALLED

BY A PROFESSIONAL MECHANIC AT YOUR FAVORITE LOCAL BIKE SHOP. IF YOU

HAVE ANY DOUBTS ABOUT HOW TO INSTALL YOUR GUIDE, TAKE IT TO A BIKE

SHOP. YOU’LL BE GLAD YOU DID.

TOOLS NEEDED:

• Appropriate crank
removal tools

• 4mm allen key

• 3mm allen key

• 8mm wrench

• Torque wrench

Using a 4mm allen key fasten the guide to the
frame’s threaded tabs using the included ISCG
screws (FIG. A). As needed, install the included
1mm spacers. Typical ISCG spacing (assumes tabs
are flush with face of BB shell) is 1mm for 73mm,
and 1mm for 83mm shells.* These spacers always
go between the backplate and the frame’s threaded
tabs. Leave the ISCG screws slightly loose for now.

*These are recommendations only based on common

installations, your setup may vary.

1

2

12 - 12:30

Adjust the guide so that the upper guide bolt is
located between 12:00 and 12:30 relative to the
center of the BB (FIG. B). Once there, tighten the
ISCG screws to 8-9 Nm. Remove the upper guide
using a 3mm allen key and 8mm wrench.

A

B

USER MANUAL

IMPORTANT CONSUMER SAFETY INFORMATION

WARNING: RIDING A BIKE IS DANG EROUS. NOT PROPERLY MAINTAINING OR

INSPECTING YOUR BIKE AND ITS COMPONENTS IS EVEN MORE DANGEROUS.

IT IS ALSO DANGEROUS TO NOT READ AND FOLLOW THESE INSTRUCTIONS.

1. DO NOT PERFORM ANY MODIFICATIONS OR ADJUSTMENTS THAT ARE NOT OUTLINED
IN THIS MANUAL.

2. INSPECT YOUR CHAIN GUIDE BEFORE EVERY RIDE. INSPECT AREAS FOR ANY SIGNS
OF EXCESSIVE RUBBING, BEN DING, CRACKING OR OTHER DAMAGE. IF YOU NOTICE
ANYTHING ABNORMAL, DO NOT RIDE IT. RETURN IT TO YOUR DEALER OR CONTACT MRP
FOR A COMPLETE INSPECTION AND NECESSARY REPAIR.

3. MRP RECOMMENDS THAT YOU WEAR PROPER SAFETY EQU IPMENT EVERY TIME YOU
RIDE, INCLUDING APPROVED BICYCLE HELMET. NEVE R RIDE AT NIGHT WITHOUT LIGHTS.

4. ALWAYS USE GENUINE MRP PARTS. USE OF AFTERMARKET REPLACEMENT PARTS AND
UPGRADES VOIDS THE WARRANTY AND COULD CAUSE STRUCTURAL FAILURE.

MRP HIGHLY RECOMMENDS THAT YOU HAVE YOUR NEW GUIDE INSTALLED

BY A PROFESSIONAL MECHANIC AT YOUR FAVORITE LOCAL BIKE SHOP. IF YOU

HAVE ANY DOUBTS ABOUT HOW TO INSTALL YOUR GUIDE, TAKE IT TO A BIKE

SHOP. YOU’LL BE GLAD YOU DID.

TOOLS NEEDED:

• Appropriate crank
removal tools

• 4mm allen key

• 3mm allen key

• 8mm wrench

• Torque wrench

Using a 4mm allen key fasten the guide to the
frame’s threaded tabs using the included ISCG
screws (FIG. A). As needed, install the included
1mm spacers. Typical ISCG spacing (assumes tabs
are flush with face of BB shell) is 1mm for 73mm,
and 1mm for 83mm shells.* These spacers always
go between the backplate and the frame’s threaded
tabs. Leave the ISCG screws slightly loose for now.

*These are recommendations only based on common

installations, your setup may vary.

1

2

12 - 12:30

Adjust the guide so that the upper guide bolt is
located between 12:00 and 12:30 relative to the
center of the BB (FIG. B). Once there, tighten the
ISCG screws to 8-9 Nm. Remove the upper guide
using a 3mm allen key and 8mm wrench.

A

B

From the back of the guide, use a 4mm allen key to
remove the rearward skid bold from the lower portion
(FIG. C). Swing the lower portion of the guide down
(FIG. D).

3

Install the crankset and chain and reinstall the upper
guide (FIG. D). Tighten the upper guide bolt to 1.2-

1.3 Nm. There should be roughly 3mm of space
between the chain and the ceiling of the upper guide.

4

Swing the lower portion of the guide closed and
reinstall the rearward skid bolt from the back of the
guide (FIG. G). Tighten to 3.5-4 Nm. If you encounter
trouble with the alignment of the rearward skid bolt,
double check that the pocket of the lower portion
of the guide is free of dirt and debris and that the
backplate is able to fully seat within it. A slight tap
with the palm may be required for the backplate to
fully seat.

Check that all fasteners have been appropriately
tightened and that there is no unwanted rubbing
or contact anywhere in the assembly (FIG. H). On
full-suspension installations, remove the air or coil
from the shock and fully cycle the suspension to be
certain. Check the functionality of the of the guide in a
safe environment.

6

7

Check that the alignment of the guide is correct.
The chain should be centered in the upper guide
in the middle range of the cassette (FIG. F). There
should be little or no contact between the chain and
upper guide while in the smallest or largest cogs of
the cassette. Refine this spacing using the included
ISCG spacers if necessary.*

*This will require reversal of the installation steps thus far and

restarting at step one.

5

C

D

E

F

G

H

FOR MORE I NFORMATION PLEASE VISIT US ON THE WEB AT

MRPB IKE.COM

OR CALL US AT [phone], WE’LL BE GLAD TO ASSIST

YOU!

580 NORTH WESTGATE DR.

GRAND JUNCTION, CO 81505

From the back of the guide, use a 4mm allen key to
remove the rearward skid bold from the lower portion
(FIG. C). Swing the lower portion of the guide down
(FIG. D).

3

Install the crankset and chain and reinstall the upper
guide (FIG. D). Tighten the upper guide bolt to 1.2-

1.3 Nm. There should be roughly 3mm of space
between the chain and the ceiling of the upper guide.

4

Swing the lower portion of the guide closed and
reinstall the rearward skid bolt from the back of the
guide (FIG. G). Tighten to 3.5-4 Nm. If you encounter
trouble with the alignment of the rearward skid bolt,
double check that the pocket of the lower portion
of the guide is free of dirt and debris and that the
backplate is able to fully seat within it. A slight tap
with the palm may be required for the backplate to
fully seat.

Check that all fasteners have been appropriately
tightened and that there is no unwanted rubbing
or contact anywhere in the assembly (FIG. H). On
full-suspension installations, remove the air or coil
from the shock and fully cycle the suspension to be
certain. Check the functionality of the of the guide in a
safe environment.

6

7

Check that the alignment of the guide is correct.
The chain should be centered in the upper guide
in the middle range of the cassette (FIG. F). There
should be little or no contact between the chain and
upper guide while in the smallest or largest cogs of
the cassette. Refine this spacing using the included
ISCG spacers if necessary.*

*This will require reversal of the installation steps thus far and

restarting at step one.

5

C

D

E

F

G

H

FOR MORE I NFORMATION PLEASE VISIT US ON THE WEB AT

MRPB IKE.COM

OR CALL US AT [phone], WE’LL BE GLAD TO ASSIST

YOU!

580 NORTH WESTGATE DR.

GRAND JUNCTION, CO 81505