Tamiya Mini 4WD PRO High Speed Gear Set (for MS Chassis/Gear Ratio 4:1)(15355)

A high-speed gear set for MA and MS chassis cars, geared at a 4:1 ratio to favor top speed over acceleration -- a common choice on long, straight-heavy courses. The set supplies the blue and orange gears needed to convert a chassis away from its stock ratio, along with the associated shafts.

• Gear ratio: 4:1
• 2x blue gears, 2x orange gears
• Includes gear shafts and small parts
• Compatible with MA and MS chassis cars

A 4:1 ratio sits toward the lower-torque, higher-speed end of the gear ratios Tamiya offers for MA/MS chassis cars, trading the stronger corner-exit acceleration a lower-ratio gear set gives for a higher achievable top speed once the car is up to pace -- why it tends to suit long, uninterrupted straights over tracks packed with corners and slopes. Fitting it means swapping the crown gear on the rear axle and the matching gear on the counter gear shaft together as a pair, since a ratio change only works correctly when both halves of the mesh change at once; the set supplies both gears plus the shafts to complete the swap.