Description
BMW E81/E82/E87 1 Series Hatchback/Coupe (04-13) BC Racing RM coilover kit 5.5/8 kg/mm
The BC Racing RM coilover kit E87 E82 (part number I-11-RM-MA) is a coilover kit adjustable in height and damping, also simply called a coilover, for the BMW 1 Series E81, E82 and E87, excluding the 1M Coupe, model years 2004 to 2013. The spring rate is 5.5 kg/mm front and 8 kg/mm rear.
The RM series is the BC Racing coilover kit for track days, hill climbs and tarmac rally. On the RM, BC Racing uses an inverted monotube on MacPherson struts and an upright monotube on other suspension types.
The dampers are filled with fully synthetic oil with a very high viscosity index and have a digressive piston. With 30 clicks you adjust compression and rebound together, and you adjust the ride height continuously via the damper body. The kit fits the E81, E82 and E87, but not the 1M Coupe.
Key benefits
- Inverted monotube on MacPherson struts: characteristic of the RM series.
- Digressive piston: firm control of body roll and dive.
- Fully synthetic oil: with a very high viscosity index.
- 30-click damping adjustment: compression and rebound in one action.
- Spring rate 5.5/8 kg/mm: the same as the BR and DS kits for the 1 Series.
- Pillowball top mounts at the front: or camber plates, with rubber or the original mounting at the rear.
- Continuously adjustable ride height: via the damper body.
- Rebuildable: the dampers can be rebuilt.
Suitable for
BMW 1 Series E81 (3-door), E87 (5-door) and E82 Coupe, model years 2004 to 2013; not for the 1M Coupe and not for the E88 Convertible
- Track days and circuit training sessions with the 1 Series
- Hill climbs and tarmac rally
- A club sport car that is mainly driven on track
Technical specifications
- Manufacturer: BC Racing
- Part number: I-11-RM-MA
- Series: RM, for track days, hill climbs and tarmac rally
- Spring rate front/rear: 5.5/8 kg/mm
- Damper design: inverted monotube on MacPherson struts, upright monotube on other suspension types; fully synthetic oil with a very high viscosity index
- Damping: 30 clicks, compression and rebound simultaneously, digressive
- Ride height: continuously 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 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. Have the wheel alignment checked after setting the height, because camber and toe change as well. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing temporarily has the kit out of stock, you can still order and we will keep you informed.
The BC Racing RM kit I-11-RM-MA for the BMW 1 Series E81, E82 and E87 combines a digressive piston and fully synthetic oil with springs of 5.5 kg/mm front and 8 kg/mm rear.
Why choose this RM coilover kit E87 E82?
A 1 Series that you use for a hill climb or a tarmac rally stage has a hard time of it. The RM series is designed for that work, with fully synthetic oil and a digressive piston. Bear in mind, though, that BC Racing wants the RM to receive periodic greasing and recommends it less for road use than the BR or DS.
BC Racing coilover kits for the BMW 1 Series E81/E82/E87
Overview of the BC Racing series for the BMW 1 Series E81/E82/E87 supplied by Race4DriftParts, with the BC Racing part number. Spring rates in kg/mm, front/rear.
| Series | Part number | Springs f/r | Damping | Intended for |
|---|---|---|---|---|
| BR | I-11-BR-RA | 5.5/8 | 30 clicks, linear, pillowball top mounts front | Road with the occasional track day |
| DS | I-11-DS-DA | 5.5/8 | 30 clicks, digressive, pillowball top mounts front | Track-focused, sporty road use |
| RM (this kit) | I-11-RM-MA | 5.5/8 | 30 clicks, digressive, synthetic oil, pillowball top mounts front | Track days, hill climbs, tarmac rally |
| ER | I-11-ER | 8/12 | 2-way, 30 clicks per direction, external reservoir | Serious track and competition use |
| ZX | I-11-ZX | 5.5/8 | 3-way (20/12/30 clicks), external reservoir | Competition, long sessions, drifting |
For the BMW 1 Series E88 Convertible, BC Racing has separate kits. Their part numbers start with I-149.
Frequently asked questions
Does the BC Racing RM coilover kit I-11 fit a BMW 1 Series E88 Convertible?
No, BC Racing releases the I-11 kits for the E81, the E87 and the E82 Coupe, and lists the E88 Convertible separately. For the E88 Convertible there is the BR kit I-149-BR-RA. The 1M Coupe also has its own kits (I-21).
What is the difference between the BC Racing RM and BR coilover kits for the BMW E87?
The RM is made for track days, hill climbs and tarmac rally, the BR for the road with the occasional track day. The RM coilover kit E87 E82 has a digressive piston and fully synthetic oil, the BR a linear piston. BC Racing recommends the RM less for the road and advises periodic greasing.
What maintenance does the BC Racing RM coilover kit for the BMW 1 Series E82 need?
BC Racing advises periodic greasing of the RM series. In addition, the dampers are rebuildable, so they can be rebuilt after a season of intensive use. Noise from track use is not covered by the warranty.
What is the delivery time of the BC Racing RM coilover kit for the BMW E81, E82 and E87?
The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If the kit is briefly sold out, you can still order it and we will let you know when it is in.
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.
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