Description
BMW 1 SERIES (5-BOLT) F20 (11-19) BC Racing RM Series MA Coilovers | 5/8kg.mm
BC Racing RM Series MA Coilovers for the BMW 1 SERIES (5-BOLT) F20 (11-19) deliver precision suspension tuning with a 5/8kg.mm spring rate, featuring inverted shocks with camber pillowball top mounts at the front and flexible rear mounting options including rubber top mount or no top mount configurations. These performance coilovers are engineered to provide enhanced handling and adjustability for serious drivers seeking professional-grade suspension setup on their F20 platform. Whether you're building a track-focused machine or refining daily-drive dynamics, the BC Racing RM Series offers the tunability demanded by BMW 1 Series enthusiasts.
BC Racing RM Series Coilovers
The BC Racing RM Series features high-quality damping-adjustable monotube inverted dampers at the front, or front and rear depending on the vehicle. The RM offers the majority of the features of the BR Series with the additional benefit of the inverted damper unit — a design that reduces unsprung weight and moves vital damper fluid away from detrimental heat sources to prevent the overheating that causes damper fade under extreme track use.
Key Features
- Digressive piston and damping curve
- Inverted monotube damper bodies
- Reduced unsprung weight
- 30-way adjustable damping
- Ride height adjustment separate to spring preload
- Camber adjustable top mounts (depending on model)
- Pillowball upper mount (depending on model)
- Bearing mounted upper front spring platform (depending on model)
- Tapered bottom mount locking collar to prevent collar working loose
- Custom spring rates available (depending on model)
- All spare parts available with low lead times
- Dust boot to protect damper seals
- 1 year manufacturer warranty
Reduced Unsprung Weight
Unsprung weight is reduced by moving the oil and gas reservoir away from the hub and attaching it to the shell. A lighter wheel and hub assembly responds more readily to road bumps, maintaining greater grip over imperfect surfaces. High unsprung weight can lead to wheel hop on bumpy ground, reducing both ride quality and ultimate handling.
Reduced Heat Transfer to Damper Fluid
Hard-driven cars generate significant heat within the braking system, conducted through the hub into the damper unit. By inverting the damper, the oil and gas reservoir is moved away from the hub, reducing conducted heat reaching the fluid. Keeping oil and gas temperatures lower maintains consistent damping rates — allowing you to corner faster for longer.
Reduced Flex
The large 42mm damper rod combined with the inverted design gives the RM units significantly greater strength and resistance to side loadings during hard cornering, resulting in more consistent steering geometry and more predictable, responsive handling.
The MA configuration is supplied with inverted dampers and aluminium camber adjustable pillowball top mounts on the front (where available), and upright dampers with aluminium rear top mounts with rubber centres or no rear top mounts depending on the application.
Kit Specifications
- Fitment: BMW 1 SERIES (5-BOLT) F20 (11-19)
- Spring Rate: 5/8kg.mm
- 30-Way Combined Damping Adjustment
- Front Top Mount: Inverted Shock - Camber Pillowball Top Mount
- Rear Top Mount: Rubber Top Mount or No Top Mount
- Monotube Damper Design
- Full Ride Height Adjustment (via Bottom Mount)
- Adjustable Spring Platforms for Corner Weighting
- Tapered Bottom Mount Locking Collar
- Custom Spring Rates Available
- All Spare Parts Available
- 1 Year Manufacturer Warranty
Fitment Data
| Make | Bmw |
| Model | 1 Series |
| Chassis | (5-BOLT) F20 (11-19) |
| Series | RM |
| Type | MA |
| Spring Rate | 5/8kg.mm |
| Front Top Mount | Inverted Shock - Camber Pillowball Top Mount |
| Rear Top Mount | Rubber Top Mount or No Top Mount |
| Part Number | I-81-RM-MA |