Traxxas Ford Fiesta ST Rally 74054-4 Owner's Manual page 26

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ADJUSTING YOUR MODEL
Going Brushless
Brushless motors provide increased power output and greater
efficiency. Upgrading the high-stall gear clutch assembly and
stock pinion is required to provide the extra transmission and
driveline strength to make your model capable of handling extreme
brushless power. Replace the high-stall gear clutch assembly with
the slipper clutch assembly (part #6878), and replace the stock
pinion with the 32-pitch, 13-T pinion (part #3943).
Wheels and Tires
Many types of aftermarket tires and wheels can be adapted for
use on your model. Most will affect the overall width and the
suspension geometry of the model. The offsets and dimensions
designed into the model's wheels are intentional; therefore, Traxxas
cannot recommend the use of other non-Traxxas wheels with
different specifications. The diameter of the wheels is an innovative
design, and there is a variety of different tires available for you to
experiment with in addition to the included tires on the model
(listed in your parts list). Experimentation with different types of
tires is recommended to see which ones work the best on the
terrain where the model is run. When selecting tires, consider the
overall diameter and the rubber compound (hard or soft). If the
overall diameter of the tire is significantly increased, you will need
to use a smaller pinion gear to compensate for the larger tire. Soft
compound tires with many short spikes generally work better
on hard, dry surfaces. In loose dirt, a tire with large spikes should
perform better. See your parts list for accessory wheels and tires.
26 • TRAXXAS

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