If you plan to race it, you need to know what classes they run at your local track(s). Most common motor used right now would be probably be 17.5 brushless, which is used in both sportsman (no ESC timing advance) and is also used in 17.5 expert class (Open ESC)
The TA05 can be run in in the Tamiya championship series (TCS) in the GT2 class if you put a Tamiya "silver can" brushed motor in it (requires an brushed capable ESC).
13.5 Super stock class still exists here in Toronto, but most places have dropped it and just run the new ROAR classes. 17.5 with boosted ESCs has replaced 13.5 most places.
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