6x139.7 (also written 6x5.5) is the standard half-ton truck pattern. You will find it on mid-size trucks and SUVs — Chevrolet Silverado 1500, GMC Sierra 1500, Toyota Tacoma and Tundra, Nissan Titan. We stock 6,700 wheels drilled 6x139.7.
Measuring is simple: count the studs, then measure the diameter of the circle they sit on. Five studs are measured from the far edge of one hole to the center of the one two holes away; six or eight studs across opposite centers. Ordering the wrong pattern is the most common fitment mistake — if your measurement falls between two patterns, confirm with the vehicle's spec sheet first.