If you purchased a Remo hobby truck from banggood, then this is your perfect upgrade brushless motor... It has a 2.3mm motor shaft, which matches a 390 brushed motor gear perfectly... Get a 35A esc, and this is essentially plug and play on the Remo S Max truck... If you run 3S, you may have to upgrade your gears to the hardened steel versions ( which banggood also sells)... I run this setup on 2S, or 3S... 3S definetly has some power! Fyi: If you want to stress your gears less, or avoid buying the hardened steel upgrade gears, consider buying the 2440 brushless motor instead. You can still run that motor on 3S as well, and it won't destroy the stock gears...

Have had a couple of these type of motors good and solid.