BMW 130i Lightweight ver B Flywheel

Flywheels
Written By Ark Racing Limited

BMW 130i Lightweight Version B Flywheel.  

Ark Racing Limited introduces a lightweight flywheel engineered for BMW 130i performance enthusiasts and track-day drivers. Designed and manufactured in-house to professional motorsport standards, this flywheel is precision-machined from high-grade steel and treated with Nitride heat hardening and shot-peened finishing for maximum durability and fatigue resistance. Weighing just 11.13 kg, it significantly reduces rotational mass, delivering sharper throttle response, faster revs, and improved drivetrain efficiency—ideal for spirited driving and competitive motorsport use. Whether you're upgrading for race prep or enhancing your 130i’s road dynamics, this flywheel offers the precision and reliability demanded by serious BMW drivers.

Developed and manufactured to professional motorsport standards, keeping strength, durability and weight (mass) in mind.

Suitable for: BMW 130i

Specifications:

Material: 817M40T (Steel)
Heat Treatment: Nitride
Surface Treatment: Shot Peened
Starter Ring: Cut into the flywheel (Not a separate Ring Gear)
OD (Outside Diameter): ø293.70 mm
Mass: Lightweight version 6.80 Kg (14.99 lb)

weight convertor icon link to page Mass Convertor

NOTE: *It is a myth that a lightweight flywheel gives you more power. It actually doesn’t!

What it does achieve is it reduces the rotating mass and inertia in your vehicle. The result is your engine isn’t using valuable horsepower spinning up a heavy flywheel, it’s going straight to your wheels onto the road which is where you need it, with the bonus of making your car lighter.

ALSO AVAILABLE for use with Flywheels requiring Clutch Bolts

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ALSO AVAILABLE for use with Flywheels requiring Clutch Bolts |

We recommend using our Clutch Bolts which come with
K-Nuts at a competitive price, in some instances, SAVING 25% over our competitors.

Image: Ark Racing clutch mounting bolts.

SAVE up to 25% over competitors

More sizes are available
or can be produced please call

📞0345 557 7408

More sizes are available or can be produced in Concentric & Eccentric variants, please enquire.

Ark Racing design and manufacture numerous Starters and Flywheels for a variety of BMW engines for Motorsport & Historic Sports Cars.

BMW M12 Starter Motor | BMW M10 Starter Motor | BMW M12 STD Flywheel | BMW 130i Lightweight Ver. B Flywheel | BMW 130i Lightweight Ver. C Flywheel | BMW Conversion Flywheel

If you can’t find what you’re looking for, contact us.

Ark Racing can create a solution to meet your requirements.

Call us on +44 (0)345 557 7408 or complete our online contact form.

Contact Us
Ark Racing Limited

We design, develop, and manufacture bespoke starter motor systems, high-quality flywheels, and provide precision machining for the professional motorsport industry.

Located in Willenhall in the West Midlands, we pride ourselves on delivering a professional service.

Established in 1968, Ark Racing® Limited provide a complete service, from concept to the finished product.

We also provide precision and sub-contract machining via our other website, www.arkcnc.co.uk.

https://www.arkracing.com
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