RE: Savage FLUX XL HP - Gearing Wheel/Tire Question?
I'll sum it up this way:
1. Run the truck as is. However, keep a close watch on the temps. Check it often.
2.If the motor or ESC get dangerously hot or the ESC ever shuts down, then change your gearing. A 16 may be too small to allow the motor to move close enough to the spur. You might have to go up a a couple notches on the spur instead.
3. Otherwise if all is well then have fun and post a video.