I know there are already many different crawlers available, so I'm not looking for any, i should get this model or that model responses to this. What i am looking for, since i know nothing about crawlers, and, maybe for why i am doing this, crawler may not even be the best term, but i am not sure what else you would call it, but what i am looking to do is seriously slow down a Redcat Blackout XTE as a practice vehicle. The simple reason for it, it is for an inexperienced user, in a very rough area that is best suited for crawlers, just so that she can get a feel for driving RC cars, and, the reason i picked the Blackout, besides the fact that i already have it, is that i can go back to how it is set up now (3S, 80A ESC, 3900KV BL motor), after she learns it and gets familiar with it, but, because i dont see her using it much, i want to keep this as bare bones cheap as possible, so, i am looking at cheap brushed combo's on Ebay, but, there are a host of them, and where i really get lost is the 12-19T motors that are listed as crawler motors. I always was under the impression that crawlers were typically 27T and up, so, are there actually lower turn crawler motors, or are they just misprint's? Next is gearing. I'm pretty much stuck with a 55T 32P spur, since i modded the Blackout to run that spur with a slipper, so, what would be a good range of gears to run with, say for example, a 27T motor and the 55T spur, or a 35T motor with the same spur?