The MK4 is compatible with all 4 drive gear ratios. The MK4c, MK4i, MK4n are available in ratios L1-L3. The L2 ratio is the most popular ratio and are suitable for standard full-weight competition robots. The L3 ratio is more aggressive and is recommended for lightweight robots. The L4 ratio is very aggressive and is only recommended for very lightweight mini bots.

The "L" followed by a number indicates the specific gear ratio. The "+" designator after L# indicates that the pinion gear on the drive motor is a 16T, instead of a 14T. The L# and L#+ therefore refer to the overall gear ratio of the swerve module. The pinion gear size is specific to each swerve module, and it is not included in the L Gearset.

The swerve module product pages (MK4, MK4c, MK4i, MK4n) detail the drivetrain free speeds based on the motor and gear ratios.

Please refer to following table and Notes below for what is included and what gear ratios are applicable to each swerve module:



Notes:

• The standard MK4i is offered with L1, L2, and L3. It can be converted to the "+" version of the gear ratio via the 16T Drive Pinion Gear Adapter Kit. That kit replaces the standard 14T drive motor pinion gear with a 16T.
• Matching L gear ratio kits will result in the same drivetrain free speed across the entire MK4 family of swerve modules, so different swerve modules can be used on the same drivetrain. For instance:
  
  
  • L2 MK4 and L2 MK4i have the same drivetrain free speed.
  • L3+ MK4i (L3 Gearset + 16T Drive Pinion Gear Adapter Kit) and L3+ MK4n have the same drivetrain free speed.

L1 Gear Ratio 8.14:1 (MK4/4i):

• 25T-50T 20DP Double Gear
• 19T 20DP 3/8 Hex Bore Gear

L2 Gear Ratio 6.75:1 (MK4/4i):

• 27T-50T 20DP Double Gear
• 17T 20DP 3/8 Hex Bore Gear

L3 Gear Ratio 6.12:1 (MK4/4i):

• 28T-50T 20DP Double Gear
• 16T 20DP 3/8 Hex Bore Gear

L4 Gear Ratio 5.14:1 (MK4):

• 28T-48T 20DP Double Gear
• 16T 20DP 3/8 Hex Bore Gear