Special consideration needs to be taken since wheels are made differently. Some wheels won't work with the 8mm or 5mm spacer and extender combination because of the 2-5mm extra length of the hub. Please measure your wheel to make sure it can accommodate an extra 2-5mm of hub extending into the centerbore.
The TMS hub extenders are made of high-grade, lightweight aircraft aluminum. They will press into many stock 72.5mm Oustide Diameter Hubs. These extenders are used to help keep the wheel centered and are extensions of the stock wheel hub. They are needed if a TMS 8mm or 10mm wheel spacers are used, and will also work with H&R 5mm spacers. Each hub extender is anodized for protection and corrosion resistance. These are for the front hubs only and DO NOT fit the E30 4 lug, E46 Xi, E53, E60, E63, E64, E65, E83, E90, E91, or E92. These do fit E30 M3.