TECH SPECS
CHAIN COMPATIBILITY BY CHAINRING:
SRAM T-Type = Compatible with SRAM T-Type 12-speed drivetrains only
Shimano HG 12 = Compatible with Shimano HG12 12-speed chains such as:
- XTR CN-M9100/M9200
- XT CN-M8100/M8200
- SLX CN-M7100/M7200
Regular = Compatible with most 9-12 speed drivetrains including the following:
- All 9, 10, 11, & 12-speed SRAM drivetrains
- All 9, 10, & 11-speed Shimano drivetrains
- All 9, 10, & 11-speed KMC chains
- Single speed setups
Axle Selection & Frame Compatibility:
Select your axle width based on your frame's rear hub spacing, drivetrain standard, and required stay clearance. All widths are engineered to the same high-strength standard for everything from DJ to DH.
130mm
Chainline: 52mm
Q-Factor: 168.5mm
Arm Clearance: 70.25mm
Frame Fitment: Dirt Jump, XC, and Trail frames with 135mm, 142mm, or 148mm Boost spacing.
Standards: Matches SRAM Eagle Boost (52mm) and Shimano M9100 / M8100 / M7100.
Technical Note: Optimized for riders seeking the narrowest stance (Q-factor) on bikes with standard chainstay profiles.
136mm
Chainline: 55mm
Q-Factor: 174.5mm
Arm Clearance: 73.25mm
Frame Fitment: Modern 29er Trail and Enduro frames with high tire clearance and wide stays.
Standards: Matches SRAM Transmission (T-Type), SRAM DUB Wide, and Shimano M9120 / M8120 / M7120.
Technical Note: Required for SRAM T-Type systems. Provides +3mm lateral arm clearance per side to clear flared or oversized chainstays.
145mm
Chainline: 56.5mm
Q-Factor: 183.5mm
Arm Clearance: 77.75mm
Frame Fitment: Downhill (DH) and Super Boost+ frames.
Standards: Matches SRAM DUB DH, SRAM SB+(Super Boost), and Shimano M9130 / M8130.
Technical Note: Designed for 157mm rear spacing. Requires a 6mm offset chainring to maintain the 56.5mm chainline. Maximum clearance for reinforced gravity frames.
Weights
130mm spindle = 104g
136mm spindle = 107g
145mm spindle = 113g
165mm CR1 cranks with 136mm spindle = 680g
32T 8-bolt chainring SRAM TT 8 bolt = 72g
CONFIGURATION MATRIX
| Axle | Chainline | Q-Factor | Clearance | SRAM / Shimano Standard |
|---|---|---|---|---|
| 130mm | 52mm | 168.5mm | 70.25mm | Eagle Boost / M9100 |
| 136mm | 55mm | 174.5mm | 73.25mm | T-Type & DUB Wide / M9120 |
| 145mm | 56.5mm | 183.5mm | 77.75mm | DUB DH & SB+ / M9130 |
INSTALLATION GUIDE
Things You Will Need
- Crank arms
- Chainring
- 8 chainring bolts
- Wrench with T20 bit
- Spindle
- Torque wrench
- Grease
- 8mm allen key
- 2.5mm allen key
Assembly time: approximately 5-10 minutes.
Difficulty: Easy
INSTALLING CHAINRING AND SPINDLE
STEP 1 (chainring installation):
Place the chainring on the appropriate crank arm and tighten using the 8 chainring bolts provided.
STEP 2
Torque the chainring bolts to 4nm.
STEP 3 (spindle installation):
Properly lubricate the opposite crank arm with appropriate grease (as shown in photos).
STEP 4
Tighten the spindle using an 8mm allen key, ensuring the spindle is threaded properly. Using a cloth or shop towel, clean any excess grease that is pushed out. Torque to 55nm.
INSTALLING CRANKS ON BIKE
STEP 5
Liberally apply grease to the spindle and slide on from the non-drive-side of the bike.
STEP 6
Prepare the drive-side crank arm by greasing the contact point (as shown in photo). Then install the crank arm (with chainring) using a 8mm allen key. Ensure the crank arms are positioned properly on either side of the bike. The chain can now then be installed.
*make sure to use the proper amount of spacers on either side of the bottom bracket for optimal chainline. This information can be found on SRAM’s website*
STEP 7
Torque the cranks to 55nm.
STEP 8
Screw the preload Adjuster (towards the bottom bracket), then using a 2.5mm allen key, tighten pre-loader pinch-bolt to 1nm.
INSTALLING PEDALS
STEP 9:
Properly grease the pedal threads, place the provided washer on the crank arm and thread the pedal on. Torque to 35-40nm.
If you’re using Title crank boots (coming soon), follow the same process as above, mount the washer on the crank arm, then slide the boot over before installing the pedal.
Additional
Your CR1 cranks are professionally lubricated and spec’d from the factory, but to ensure the longevity, the outer crank bolt (as seen in the photos) should be torqued to 20nm using a cassette tool.