1901-1953 Indian Motorcycle – Parts – Accessories

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  5. Service Bulletin I-14 Gear Ratios: Model 149-249

GEAR RATIOS: MODEL 149- 249

The gear ratios listed can be obtained by using the transmission sprockets and rear wheel sprockets as shown. The rear wheel assemblies and sprockets are interchangeable between models.

CountershaftRear Wheel Sprocket
SprocketModel 249-41 teethModel 149-42 teeth
147.267.43
156.776.94
166.356.51
175.986.12 Std.
185.655.78
195.35 Std.5.48
205.085.20

To find ratio in any gear —

  • Multiply the final drive ratio above by —
    2.78 for 1st gear
    1.91 for 2nd gear
    1.21 for 3rd gear
  • Example: To find 1st gear ratio for Model 149 std.
    6.12 x 2.78 = 17.01 : 1

The countershaft sprockets may be ordered from the Parts Department or your Parts Distributor. List price is $3.95 per sprocket. Full range of sizes is shown below:

1817008Transmission sprocket14 teeth
181700915 teeth
181700516 teeth
181700317 teeth
181700618 teeth
181700419 teeth
181700720 teeth

Walter Brown
Service Manager

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