The new 42099 LEGO Technic X-Treme Off-Roader does lack torque as it can barely make it over a couple of books on the living room floor, so here’s my attempt at upgrading the model by switching two sets of gears over, as described by Racingbrick - credit to him - plus a few practical tips of my own.
You can see the original speed build here:
[ Ссылка ]
