How to choose brushless motor pinion?

[KAITvsk Racing]

Hello!
How to choose brushless motor pinion?

RC Car spec:
1/8 Buggy 4WD
Motor: 2200KV
Spurr: 46T

 

[The Bean]

There are sites on which you can insert tire size, motor kv, gear sizes and diff gear ratios to calculate a speed. I'd experiment to figure out what yo get

 

[AIan]

For speed running, bashing, etc???

 

[KAITvsk Racing]

For speed running, bashing, etc???

Track

 

[AIan]

I’d start around 16t myself but have a few options like 16-20t
And a couple lower like 12, & 14t