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Description

BMW E90/E92 3 Series Sedan/Coupe RWD (05-11) BC Racing RM coilover kit 5.5/12 kg/mm

The BC Racing RM coilover kit E90 E92 (part number I-03-RM-MA) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW 3 Series E90 Sedan and E92 Coupe with rear-wheel drive, excluding the M3, model years 2005 to 2011. The spring rate is 5.5 kg/mm front and 12 kg/mm rear.

The RM series from BC Racing is made for track days, hill climbs and tarmac rally. On MacPherson struts, BC Racing uses an inverted monotube damper in this series, on other suspension types an upright monotube.

The digressive piston and fully synthetic oil with a very high viscosity index keep the damping stable as the dampers warm up. With 5.5 kg/mm front and 12 kg/mm rear, this kit for the E90 and E92 has clearly stiffer rear springs than the BR and DS kits (5.5/8 kg/mm).

Key benefits

• Inverted monotube: on MacPherson struts an inverted damper design, typical of the RM series.
• Digressive piston: firm damping during slow body movements.
• Fully synthetic oil: very high viscosity index for consistent damping when things get hot.
• 30-click adjustment: compression and rebound adjustable together, per damper.
• Spring rate 5.5/12 kg/mm: stiffer rear springs than the BR and DS kits for the E90 and E92.
• Pillowball top mounts at the front: or camber plates, with rubber or the original mounting at the rear.
• Made for intensive use: track days, hill climbs and tarmac rally.
• Rebuildable: the dampers can be rebuilt.

Suitable for

BMW 3 Series E90 Sedan (2005 to 2011) and E92 Coupe (2006 to 2011) with rear-wheel drive; not for the M3 and not for the xDrive (xi) with four-wheel drive. For the E91 Touring and E93 Convertible, BC Racing has separate kits (I-17).

• Track days and regular circuit work
• Hill climbs and tarmac rally
• Drivers looking for stiffer rear springs than the BR or DS

Technical specifications

• Manufacturer: BC Racing
• Part number: I-03-RM-MA
• Series: RM, for track days, hill climbs and tarmac rally
• Spring rate front/rear: 5.5/12 kg/mm
• Damper design: inverted monotube on MacPherson struts, upright monotube on other suspension types, digressive piston, fully synthetic oil
• Damping: 30 clicks, compression and rebound simultaneously
• Ride height: infinitely adjustable via the damper body
• Top mounts: pillowball top mounts or camber plates at the front, rubber or original mounting at the rear
• Contents: dampers and springs front and rear, lower mounts, top mounts where applicable, adjustment spanners and warranty card with serial number
• Warranty: 1 year on manufacturing defects; noise from track use is not covered by the warranty

Fitting and delivery

The RM kit is vehicle-specific and replaces the original dampers and springs. We recommend having it fitted by an experienced mechanic. BC Racing advises periodic greasing of the RM and ZR series and recommends them less for road use than the BR, DS, ER or ZX. After setting the ride height, have the wheel alignment checked and adjusted again. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing does not have the kit in stock, you can still order; we will then let you know when it is expected.

The BC Racing RM kit I-03-RM-MA for the BMW E90 and E92 combines a digressive piston with fully synthetic oil and springs of 5.5 kg/mm front and 12 kg/mm rear.

Why choose this RM coilover kit E90 E92?

An E90 or E92 that regularly does a hill climb, a tarmac rally stage or a track day needs damping that does not fade as it warms up. With synthetic oil and a digressive piston, the RM keeps its character, and with 12 kg/mm at the rear the rear axle is sprung stiffer than with the BR or DS. Do bear in mind that BC Racing wants the RM to receive periodic greasing and recommends it less for the road.

BC Racing coilover kits for the BMW E90 Sedan and E92 Coupe

Overview of the BC Racing series for the BMW E90 Sedan and E92 Coupe supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.

For the BMW E91 Touring and E93 Convertible, BC Racing has separate kits. Their part numbers start with I-17.

Frequently asked questions

What is the difference between the BC Racing RM and DS coilover kit for the BMW E90 and E92?

The RM is made for track days, hill climbs and tarmac rally and uses fully synthetic oil; for road use, BC Racing recommends the DS instead. Both have a digressive piston and 30 clicks. The RM coilover kit E90 E92 has 5.5/12 kg/mm, the DS 5.5/8 kg/mm.

Does the BC Racing RM coilover kit for the E90 and E92 need maintenance?

Yes. BC Racing advises periodic greasing of the RM series. In addition, the dampers can be rebuilt when they are due for an overhaul after intensive use.

Does the BC Racing RM coilover kit fit a BMW E90 xDrive, M3 or E91 Touring?

No. This RM kit is intended for the E90 Sedan and E92 Coupe with rear-wheel drive. The M3 and the xDrive (xi) with four-wheel drive are excluded, and for the E91 Touring and E93 Convertible BC Racing supplies separate kits under the I-17 numbers.

What is the delivery time of the BC Racing RM coilover kit for the BMW E90 and E92?

Expect 1 to 2 weeks as long as the manufacturer has stock. If the kit is temporarily unavailable, you can still order it and we will keep you informed.

Delivery outside the European Union: different shipping costs may apply. Don’t worry: we will email you as soon as possible after your order and agree the shipping with you. You are not committed to anything without your consent.