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USER MANUAL

IMPORTANT CONSUMER SAFETY INFORMATION

WARNING: RIDING A BIKE IS DANGEROUS. 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, BENDING, 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 EQUIPMENT EVERY TIME YOU 
RIDE, INCLUDING APPROVED BICYCLE HELMET. NEVER 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 DANGEROUS. 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, BENDING, 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 EQUIPMENT EVERY TIME YOU 
RIDE, INCLUDING APPROVED BICYCLE HELMET. NEVER 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

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