Sold as a pair — one left, one right, matched. Price is for the pair.
数量（对）
PRICE IS NOT FINAL
Prices are for the standard build and exclude freight.
Your final price is confirmed on the formal invoice before production.
F90 M5 / M8 rear rotors — 380 × 28 mm, sold as a pair.
The rear disc on the M5 and M8 is 380 × 28 mm with a 46 mm hat — taller than the G80's 38 mm, shorter than the F80's 64.8 mm. Three cars, three rear discs in the 370–380 mm range, three different offsets. This is the one that fits the F90 and the M8 only.
G3500 high-carbon ring, 6061-T6 aluminium hat, stainless floating hardware, 67 mm centre bore, 5 bolt holes, 28 mm thick against a 26.0 mm minimum. The 46 mm hat is what makes this a different casting from the F87 rear disc, despite the shared 380 mm diameter.
Start with the hat height: 46 mm. The F87 rear disc is also 380 mm but sits at 64.9 mm, and the G80 rear is 370 mm at 38 mm. Diameter alone will not separate these three — the offset will.
F90 M5 and M8 rear, 380 × 28 mm, 46 mm hat — OE 34217991103 and 34217991104. Not the 370 × 24 mm G80/G82 rear disc.
▸ Fixed or full-floating — which one?
Road car: Fixed. The rear rarely needs floating hardware on a car with this much front bias unless it is used on track.
▸ Pads, bedding and ring replacement
Rear pads on these cars last a long time; the disc usually outlives two sets. Measure at 26.0 mm before deciding to replace.
▸ Lead time
Built to order. Production takes 10–12 days. Left and right are matched and marked before packing. Transit time depends on destination and service — we confirm shipping and delivery dates by email before you pay.
