You'll have to be very gentle on the throttle with low turn motors in 2wd. I run a 6.5t in a mid/front motored 2wd (so very well balanced) and mashing the throttle will get the front wheels airborne (or the back wheels spinning madly) at almost any speed.
I'm only using it as is the only spare motor I had.
I'd prefer to use an 8.5t. Which is what I run in my 4wd, but I've not got round to buying one yet.
If the esc has features such as boost, turbo, timing and so on. You'll be able to get a significant turn of speed from it, even with the 9t.
Maybe less so with a nimh, I'd go lipo asap.
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