[ozy operator]

Thanks heap for you replies guys and info.
The reason for a more expensive combo is you get what you pay for and have lived by this rule in all my rc adventures.

The steering servo is a bls 251 heli tail servo so its fast and metal geared..over kill I know..

My hk speedy used to run abit warm in my drift car, so running high throttle with gru will have the same results?

So I was thinking 3.1 gru with 35t or 45t combo should get the job done.

Estimate loaded truck will be around 30-40 kgs.

Cheers
Rhys