4x3.75" Bolt Pattern Wheels (4x95.25mm)
4x3.75" and 4x95.25mm are the same bolt pattern. One is inches, the other millimeters. If you have been searching both and getting different results, that is why.
It is the pattern Triumph used across their small cars, and it turns up on a handful of other British makes as well:
- Triumph Spitfire 1962-1971
- Triumph GT6 1966-1973
- Triumph Herald 1959-1971
- Triumph TR7 1975-1981
- Triumph TR8 1978-1981
- Lotus 7 1957-1973
- Lotus Europa 1966-1975
Everything we make in this pattern is below, in the sizes, offsets and finishes we stock. If you are not sure which suits your car, call Alex at 866-855-3473 and tell him what you are driving.
How to measure a 4-lug bolt pattern
On a four-lug wheel, measure from the center of one stud to the center of the stud directly across from it. That distance is your bolt pattern. A x95.25mm measures 95.25mm, or 3.75 inches, across.
Four-lug is the easy case. Five-lug patterns cannot be measured straight across, because no two studs sit opposite each other.
x95.25mm and 4x100 are not interchangeable
The two bolt circles differ by 4.75mm in diameter, which works out to a little over 2mm at each stud. In a photograph they are indistinguishable. On the car, a 4x100 wheel will start onto x95.25mm studs and feel like it is going on, which is the part that catches people out. It will not seat flat, and once you are moving it will not stay true.
If your car is on the list above and a seller tells you a 4x100 wheel will be close enough, it will not. Measure it.
Bolt pattern is the one spec that cannot move
Diameter, width and offset all have some room on a given car. Bolt pattern has none. It is set by the hub, so it is the first thing to confirm and the last thing to compromise on.
Offset is the distance in millimeters from the wheel's centerline to its mounting face. It decides how far the wheel sits in or out of the arch, which affects tire clearance and suspension geometry. We make this pattern in several offsets for exactly that reason, and the right one depends on your car and your tire choice.
Why this pattern is hard to shop for
The cars that use it were built in small numbers, mostly in Britain, mostly before 1975. Tooling up for a pattern like this only makes sense if you are already set up for short runs, and most wheel manufacturers are not. It is why owners of these cars tend to reach us after working through the usual catalogs.
We drill this pattern in house. If the size you want is not in the list above, ask.
A note on the Lotus 7
The Lotus 7 was sold as a kit, and hubs were swapped freely over the years. It is common to find one running Ford Cortina, Triumph or another donor car's hubs instead of the originals. Measure yours rather than going by the factory spec.
Should I verify my bolt pattern before ordering?
Yes, always verify your bolt pattern before placing an order. Vintage and classic cars can have unique or uncommon bolt patterns, and specifications sometimes varied between model years or production runs. If you're ever unsure about your fitment, the team at VTO Wheels is happy to help. Reach out at sales@vtowheels.com or call 1 (866) 855-3473.
Not sure what you need? Call Alex at 866-855-3473. Tell him the car, the year and what tire you are running, and he will tell you what fits.