Subaru Impreza WRX STi Bolt Pattern

Catalog records for the Subaru Impreza WRX STi use two bolt patterns: 5×100 for 2004 and 5×114.3 for 2005–2012.

Yes. Catalog records show two bolt patterns: 5×114.3 (2005–2012); 5×100 (2004). Choose the pattern that matches the vehicle you have.

Generation, year range, and configuration can change the hub. Catalog records for the Subaru Impreza WRX STi list 5×114.3 for 2005–2012 and 5×100 for 2004. Do not assume later years match earlier years.

Catalog records show 5×114.3 for 2005–2012 (8 years).

Catalog records show 5×100 for 2004 (1 year).

Catalog records show 5 lugs on 5×114.3 (2005–2012); 5 lugs on 5×100 (2004).

5×114.3 means 5 lug positions on a 114.3 mm pitch circle. The first number is lug count; the second is the pitch circle diameter in millimetres.

5×100 means 5 lug positions on a 100 mm pitch circle. The first number is lug count; the second is the pitch circle diameter in millimetres.

Catalog records show 56.1 mm.

Catalog records show M12 x 1.25.

Yes. 5×114.3 and 5×4.5 describe the same bolt circle: 5 lugs on 114.3 mm (4.5 in). Use either notation when comparing wheels.

Yes. 5×100 and 5×3.94 describe the same bolt circle: 5 lugs on 100 mm (3.94 in). Use either notation when comparing wheels.

Only with a bolt-on wheel adapter from the vehicle pattern (5×114.3 or the other recorded pattern) to the wheel pattern. Adapters are directional. Confirm thickness, center bore, thread, stud engagement, clearance, and load rating. Hub swaps and redrilling are not equivalent shortcuts.

You need a directed adapter whose source pattern is 5×114.3 and whose target pattern matches the wheels. 5×114.3 to another circle is not the same as the reverse unless the catalog lists both directions. Pick the target on this page; thickness is not chosen automatically.

Spacers must match the vehicle bolt pattern (5×114.3 or 5×100). Choose thickness for clearance and offset. Matching the pattern is not a claim that a given spacer fits the vehicle.

Only when the wheel center bore is larger than the vehicle hub. Catalog records show 56.1 mm. Rings fill that gap. They do not fix every vibration issue and they do not change bolt pattern.

The ring is wheel center bore (outer) to vehicle hub (inner). Enter the bore stamped on the wheel. Catalog matches are exact outer and inner millimetres, not nearby sizes.

No. A hub ring only fills a wheel bore that is larger than the hub. A smaller wheel bore cannot be opened with a ring.

Match the recorded thread. Catalog records show M12 x 1.25. Seat style and length are not in this catalog — confirm those on the wheel before ordering.

Thread must match, but aftermarket wheels often need a different seat style or length. Matching thread is not enough by itself. Catalog records show M12 x 1.25.