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The combination of the R23300KVFOC System and 12T pinion is a good setup for rock crawling with a 2speed transmission.
Car : Axial 1/10 RockRacer YETI Kit Ver.
ESC & Motor : 60A Brushless ESC / 3800KV 540 Motor
convert to Hobbywing AXE550 R23300KVFOC System
Tires : 2.2" Maxxis