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MADNESS Autoworks
Los Angeles, CA
2716 Dawson Ave.
Signal Hill, CA 90755
Austin, TX
22108 State HW 71 W
Spicewood, TX 78669
888-993-7552 (US Toll Free)

smart fortwo Lowering Spring Set - 451 model - MADNESS

smart fortwo Lowering Spring Set - 451 model - MADNESS
Product Information
Price: $269.99 $199.99
As Low as  with Affirm.
Manufacturer: MADNESS
Average Rating:
5 out of 5 Stars! 5

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Note: By purchasing this product you understand that altering the original suspension of the vehicle may alter the ride and handling of the vehicle. You also understand that lowering the vehicle will reduce wheel travel which will alter the way the vehicle handles. This will also have an affect on the overall ride quality.
Fits Models
  • smart 451 North / South America
  • smart 451 Europe
  • smart 451 Electric
  • Please make sure the product fits your car model.

    In order to reduce errors in orders, please make sure the product you are ordering fits your vehicle model.
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    Ready to upgrade the handling of your 451 model smart?

    The MADNESS Lowering Springs were developed as a joint effort between us (MADNESS) and our European Partners that produce some of the best performance spring in the world for your 451 model smart.

    We confidently say that we have installed more suspension upgrades for the smart then any other company in North America. While we offered a number of lowering spring solutions we were not satisfied with the results. Rather then compromise and settle with the limited selection of what was available we decided to design and produce our own MADNESS Lowering Springs. The springs were designed to not only lower then car, but improve the handling of the vehicle while not drastically altering the ride quality. 

    We designed the springs to be progressive rate for the best combination of ride and handling. What are progressive rate springs?

    Progressive rate springs feature individual coils that are spaced differently and have a spring rate that is variable. Under normal driving conditions the first couple of centimeters compress easily, but as you apply more force (as in high speed cornering) the coils come closer. At a certain point, coil at the top 1/4 of progressive springs begin to touch each other and finally become inactive or dead, and that makes the spring stiffer. Apply more forces to a progressive spring then it becomes stiffer because as the number of active coils in a spring decreases, the spring rate increases. So, progressive springs may both be sensitive to very small bumps on the road, while giving the stiffness you need during hard braking and turning.


    •  Designed and manufactured exclusively for MADNESS
    •  Made in Germany
    •  TUV Approved
    •  Designed to fit the 451 model smart (2007-2014)
    •  Progressive Rate Design
    •  Improves handling of the vehicle
    •  Gives the car an enhanced stance
    •  Front drop - approximately .7"
    •  Rear drop - approximately 1.3"

    Spring Rates:

    Front Springs:
    Rate 1 - 119.91 lbs
    Rate 2 - 234.1 lbs
    Spring Type - Progressive

    Rear Springs:
    Rate 1 - 119.91 lbs
    Rate 2 - 199.90 lbs
    Spring Type - Progressive

    Manufactured to the highest standards in Germany.

    Want to see what your smart will look like with these springs? See our pictures in the product description.


    Don't forget to check out our other suspension upgrade options.


    Alignment is recommended with springs, suspension kits or coil-over kits.


    MADNESS Autoworks is your One Stop Shop for customizing, accessorizing and servicing your favorite ride.

    Whether you are looking for custom wheels, window tinting, custom stereo installation or other performance modifications we are your shop.

    MADNESS Autoworks is located in Signal Hill, CA (an enclave surrounded by the City of Long Beach) and is a facility dedicated to making your favorite ride truly yours by offering a wide line of aftermarket accessories, installation and customizing services.

    MADNESS Autoworks was originally known as SMART MADNESS a company that became famous for customizing and accessorizing smart cars.

    SMART MADNESS has become the largest provider of smart car parts, accessories and customizing services in North America and now one of the largest globally in just a couple of short years.

    We accomplished this goal by providing the very best in products and services at reasonable prices with a personal touch. We treat our customers like family members and do our best to make sure every one of our customers gets the very best treatment possible.

    A number of our customers own other cars besides the smart car and continuously ask us if we would also work and or customize their other car due to their positive experience with us. This is how MADNESS Autoworks was born.

    Our goal is simple! Provide you, the driver with the widest range of products, servicing and customizing options with friendly service at a very competitive price.

    After spending years working on cars and working with many suppliers we thought at times we could do better by designing and manufacturing some products ourselves. We started partnering up with our most trusted manufacturing partners and suppliers, investing in infastructure, manufacturing equipment and recruiting some of the best tallent that could help us design and build superior products and make them available to our fellow drivers.

    Our goal is to provide a top quality product that has been tested and used in our own cars and has proven to last and provide a good value for the investment. Whether you are looking for the best value in a set of floor mats, a performance exhaust system, an intake, a roll cage or a carbon fiber part the MADNESS Item is designed to deliver on our promise of bringing a good quality item at a reasonable price. We do not design and build our products to be the cheapest, we design then to be the best value for the money and stand behind them the same way we stand behind our work.

    If you ever have a question, need assistance or have a request contact us and we will be glad to help.

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