What Does 8×170 Bolt Pattern Fit? | Ford Trucks It Matches

If you’re shopping for wheels and keep seeing the notation 8×170, the pattern fits a specific family of heavy-duty Ford trucks. Knowing this number is the first step, but a wheel’s bolt pattern is only part of the fitment puzzle. Here is exactly what 8×170 means, which trucks use it, and the measurements that keep you from buying wheels that won’t mount safely.

The 8×170 Bolt Pattern Explained

The “8” means the wheel has eight lug holes, and the “170” is the diameter of the circle those holes form, measured in millimeters. That circle is called the pitch circle diameter, so 8×170 means eight lugs on a 170 mm circle. In imperial units, that works out to roughly 8×6.69 inches.

The pattern is chiefly a Ford heavy-duty standard. The most common factory applications are the F-250 and F-350 Super Duty lines, which have used this pattern since the 1999 model year. The Ford Excursion, built on the Super Duty platform, also uses it for its full production run from 1999 to 2005. One wheel retailer also lists select E-250 and E-350 vans with the pattern, but that application is not confirmed by official Ford documentation.

Ford Trucks That Use The 8×170 Bolt Pattern

The table below lists the vehicles that use this bolt pattern and the model years that apply. Use it as a quick reference when you’re checking a wheel listing.

If you drive a dually and need replacement wheels, our tested roundup of the best 8×170 dually wheels covers the top options that match this pattern.

How To Measure An 8-Lug Bolt Pattern

Measuring an 8-lug wheel is straightforward because the lug holes sit directly opposite each other. Run a tape measure from the center of one lug hole straight across to the center of the hole on the opposite side. That distance, in millimeters, is the pitch circle diameter. On an 8×170 wheel, that measurement should be right at 170 mm, or about 6.69 inches.

For a thorough guide on wheel fitment, Performance Plus Tire’s expert guide to bolt patterns walks through the details of how to measure and what the numbers mean.

Fitment Caveats: Why The Bolt Pattern Isn’t Everything

The bolt pattern alone won’t guarantee a wheel mounts correctly. Three other specs matter just as much: offset, hub bore, and brake clearance. A wheel with the right pattern but the wrong offset can rub suspension parts or stick out too far.

Critical warning: 8×170 is not interchangeable with 8×165.1 (often called 8×6.5) or 8×180. Those patterns look similar at a glance, but the lug holes sit on different circles. Wheel sources warn against using adapters or “close enough” patterns to force a mismatched wheel onto your truck. A wheel that isn’t centered properly puts uneven stress on the lugs, and that’s a safety risk you shouldn’t take.

Torque also matters. Always verify the torque spec for your specific model year and re-check lug nut tightness after the first 50-100 miles of driving.