Description
BMW E81/E82/E87 1 Series Hatchback/Coupe (04-13) BC Racing ER coilover kit 8/12 kg/mm
The BC Racing ER coilover kit E87 E82 (part number I-11-ER) 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 8 kg/mm front and 12 kg/mm rear.
The ER series is the 2-way adjustable coilover kit from BC Racing, made for serious track and competition use. For the 1 Series E81, E82 and E87, BC Racing supplies this kit with stiffer springs than the BR, DS and RM: 8 kg/mm front and 12 kg/mm rear.
Each monotube damper works with a double piston and an external reservoir. You adjust compression and rebound independently, each in 30 clicks. The damping is digressive and the oil is fully synthetic with a very high viscosity index.
Key benefits
- 2-way adjustable: compression and rebound separately, each in 30 clicks.
- External reservoir: the double piston works together with a separate oil reservoir.
- Digressive damping: firm at slow body movements.
- Fully synthetic oil: with a very high viscosity index.
- Spring rate 8/12 kg/mm: stiffer than the BR, DS and RM kits for the 1 Series.
- Continuously adjustable ride height: via the damper body.
- Camber plates on suitable kits: with rubber top mounts as an option.
- 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
- Club competitions and serious track days
- Tuning compression and rebound for each circuit
- A 1 Series built mainly for the track
Technical specifications
- Manufacturer: BC Racing
- Part number: I-11-ER
- Series: ER, 2-way with external reservoir
- Spring rate front/rear: 8/12 kg/mm
- Damper design: monotube with double piston and external reservoir, digressive, fully synthetic oil with a very high viscosity index
- Damping: 2-way, compression and rebound independent, 30 clicks each
- Ride height: continuously adjustable via the damper body
- Top mounts: camber plates on suitable kits, rubber top mounts optional
- 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. After installation, have the wheel alignment reset, because camber and toe change along with the ride height. The delivery time is 1 to 2 weeks as long as the manufacturer has stock. If BC Racing is temporarily out of stock, you can still order and we will let you know when it will be delivered.
The BC Racing ER kit I-11-ER for the BMW 1 Series E81, E82 and E87 has an external reservoir, 2-way damping with 30 clicks per direction and springs of 8 kg/mm front and 12 kg/mm rear.
Why choose this ER coilover kit E87 E82?
Anyone who takes part in club competitions or serious track days with a 1 Series wants to be able to tune compression and rebound separately. The ER makes that possible, and the stiffer 8/12 kg/mm springs suit a car built mainly for the track. The external reservoir with double piston and the digressive damping make the kit suitable for serious track use.
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 | I-11-RM-MA | 5.5/8 | 30 clicks, digressive, synthetic oil, pillowball top mounts front | Track days, hill climbs, tarmac rally |
| ER (this kit) | 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 ER coilover kit I-11 fit every BMW 1 Series?
No, BC Racing releases it for the E81, the E87 and the E82 Coupe from 2004 to 2013, but not for the 1M Coupe. For the E88 Convertible and the 1M Coupe there are separate kits (I-149 and I-21).
Why does the BC Racing ER coilover kit for the BMW E87 have different springs from the BR and DS?
Because BC Racing supplies the ER for the 1 Series with 8 kg/mm front and 12 kg/mm rear, compared with 5.5/8 kg/mm on the BR, DS, RM and ZX. The ER coilover kit E87 E82 is therefore tuned for track and competition use. If you would like a different spring rate, contact us.
What is the difference between the BC Racing ER and ZX coilover kits for the BMW 1 Series E82?
The ER is 2-way adjustable with 30 clicks of compression and 30 clicks of rebound; the ZX is 3-way with 20 clicks of low-speed compression, 12 clicks of high-speed compression and 30 clicks of rebound. Both have an external reservoir. On this 1 Series the springs also differ: 8/12 kg/mm on the ER, 5.5/8 kg/mm on the ZX.
How quickly is the BC Racing ER coilover kit for the BMW 1 Series E81, E82 and E87 delivered?
Within 1 to 2 weeks as long as the manufacturer has stock. If the kit is temporarily sold out, you can still order it and we will tell you the delivery date.
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.
EN
NL
FR
DE
Reviews
There are no reviews yet.