Actually, there are very few times when you should use torque gears, they are generally a waste of motor speed. Your motor should be able to handle that M170 spring, I've heard of people putting M190s on those motors and them being able to pull it. You just can't use a small battery.
I'd stick with that motor, and maybe stick with the gears or pick up some SHS 18:1 gears just to be safe. If you've got the budget, you could get some Riot gears, but they are about 4-5x as expensive as the very good SHS gears.
I'd stick with that motor, and maybe stick with the gears or pick up some SHS 18:1 gears just to be safe. If you've got the budget, you could get some Riot gears, but they are about 4-5x as expensive as the very good SHS gears.