JConcepts makes wheels as an alternative.
For a 10.5t motor (i believe the internal ratio is 2.6) you want to be in the 25 - 28 area - it's difficult without knowing the make of motor - some like being heated lower etc. Best to start off low and increase.
Tyres - you are best running what the local fast guy is running as it's very track specific.
Servo - i run bluebird servo - cheap, metal gears and fast.
This
https://hobbyking.com/en_us/bms-661d...sec-46-5g.html