Coelacanth wrote: ↑Wed Jul 18, 2018 1:18 pm
If you give me your tires outside diameter, I can calculate a theoretical close-to-ideal pinion gear size with an Optima gear & rollout ratio calculator I made in Excel. Motor power doesn't really have any bearing on ideal rollout ratio because all motors have the same diameter and therefore rotational distance. All else being equal--spur/pinion, tire diameter being constants--one rotation of the motor will always rotate the wheels the same exact distance, regardless of motor. (Unless of course you slap in a 550-size or anything non-540-can size.)
It looks like the tires measures right at 3.5"
Not to question your expertise, but I've had several different brushless esc's & each has had a chart that suggested different gearing ratios depending on what turn (or kv) motor being used. They also had different recommendations for 2wd vs 4wd, etc. Do you think one final drive ratio works for any brushless setup regardless of the power of the motor? I appreacite your input.
I used the suggested 51t brushless spur gear and a 25t pinion (think I mistakenly said 15t in a previous post). Neither the esc or the motor get very hot so it may be fine. I don't need any more top end speed so I don't think I'll need to gear any taller. The low end torque is great so I don't think I'll need to gear any lower.