ZipZap® and ZipZap® SE Gears

Links show Upgrade Kits where gear sets are available.
image color and
geartrain ratio
 part number and description
blue, stock
transfer = 18 / 6 teeth
axle = 24 teeth
6-tooth pinion = 12.00:1
60-7501, Performance Booster Upgrade Kit
60-7503, Fast and Furious Street Tuner Upgrade Kit
60-7521, Performance Booster Upgrade Kit II
60-7526, 2 Fast 2 Furious Street Tuner Upgrade Kit  discontinued
60-7532, Initial D Street Tuner Upgrade Kit
60-7539, Muscle Car Power Upgrade Kit (gears not shown
   in Radio Shack kit picture)
60-7551, Performance Upgrade Kit
green, performance stock
transfer = 18 / 7 teeth
axle = 23 teeth
6-tooth pinion = 9.86:1
red, turbo
transfer = 18 / 8 teeth
axle = 22 teeth
6-tooth pinion = 8.25:1
 
Gear ratios assume (1) the original motor pinion gear and (2) the rear wheel gear of the same color as the transfer gear listed above.
 
links
 cars      motors      tires      wheels