Vehicle speed (mph), engine speed (rpm), tire diameter (inches), trans gear ratio, and rear axle gear ratio are all interrelated. If you know four out of five of these values, you can determine what ...

Differences in the track, tire sizes, class rules, and other factors can cause you to rethink your selection of gears, possibly from week to week and even from the beginning to the end of an event (in ...

You've added the lift and big tires, but you're being outrun on the freeway by aged Yugos, and your 4WD sucks gas faster than an earthmover. Part of your woes may simply be due to the gearing in your ...

It is true, the sport of four-wheeling starts out innocently enough with a basic rig and some basic trails-that is, until you get the itch for some more ground clearance to tackle those tougher trails ...

Here's everything you need to know about which tires are right for your vehicle and the conditions you drive through ...

Sam, aspect ratio (A/R) is yet one more measurement of a tire. I say one more because there is a lot of information necessary to classify tires. When you have nothing better to do - and I mean nothing ...

Wes Siler is your guide to leading a more exciting life in the great outdoors. As Outside’s outdoor lifestyle columnist, he writes about the intersections of science, news, politics, gear, vehicles ...

Question: I would like to ask about those low- and wide-profile tires that seem to be on many cars these days, including factory issue cars. Are these tires really practical or is it just style making ...

This is a preview. Log in through your library . Abstract Steering gear ratios in existing automobiles are made almost constant. Therefore, at low speed, the larger steering wheel angle needed ...