LEGO Technic 42099 4X4 X-treme Off-Roader stage 2 upgrade - even more power with only 4 extra gears! - RacingBrick
LEGO Technic 42099 4x4 X-Treme Off-Roader Review-38 - The Brothers Brick | The Brothers Brick
LEGO MOC 42099 Ultimate MOD by Lego technic world | Rebrickable - Build with LEGO
MAXIMUM TORQUE: 42099 LEGO Technic extreme offroader => Crawler | I did maximum transmission torque just chaging 12 and 20 gears in the set. Then I've added RC tires and locked differentials.
Imgur: The magic of the Internet
Comparing the gearing upgrade options of the LEGO Technic 42099 4X4 X-treme Off-Roader - YouTube
4X4 X-treme Off-Roader 42099 | Powered UP | Buy online at the Official LEGO® Shop US