How does the combined adjustment work on the R1?

A single knob controls compression and rebound simultaneously across 24 clicks. Turn it toward firm for more aggressive driving and back it off for everyday road use. There is no need to manage two separate dials, which keeps setup straightforward without sacrificing the ability to meaningfully change how the car feels.

Do the spring rates differ between the A-Class and CLA-Class applications?

Nitron recommends 400lbs/inch front and 457lbs/inch rear across both the W176 A-Class and C117 CLA-Class applications in Fast Road specification. Custom rates are available if your build or use case calls for something different.

How does the NTR-R1 differ from the NTR-R3 on these platforms?

The R1 uses a single combined adjuster for compression and rebound across 24 clicks, keeping setup simple and accessible. The R3 separates high speed compression, low speed compression, and rebound into three independent circuits, giving drivers and engineers the range to properly develop a setup across different circuits and conditions. The R1 suits road-focused drivers who want meaningful improvement without complexity; the R3 suits those who want full development capability.

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Description

Nitron NTR-R1 Coilover Kit for W176 / C117 Mercedes-Benz A-Class and CLA-Class

The factory suspension on the W176 Mercedes-Benz A-Class and C117 CLA-Class was developed around a wide range of drivers and conditions rather than the precision a serious build requires. The Nitron NTR-R1 closes that gap with precision-engineered combined 2-way damping adjustment drawn directly from the R3 race platform, sharing core components with a kit built for professional competition. There’s no remote canister to package around, and every unit is individually hand-built with ultra-low friction components that deliver consistent, fade-resistant damping from the street to the circuit. Hard-anodized titanium finish parts and high-grade materials keep corrosion out and weight in check, and with each kit custom built, custom sprung, and fully serviceable, it’s an investment that holds up well beyond a single season.

Unique Technology

Every Nitron shock is built from precision components that go through a thorough design and development process before reaching final assembly. The modular construction gives engineers the flexibility to approach each application properly, without compromising on how individual parts are made or how they perform together under load. Components are machined to tight tolerances and inspected one by one by trained technicians throughout production, not just at the end. New materials, finishes, and processes are validated extensively before adoption, with proprietary Nitron technologies integrated throughout to produce shocks that consistently hold up against the competition on road and track. That engineering standard is what the brand has been built on since 1998.
- Basic Damper Design:
  1. End Eye / Top Mount
  2. Damper Piston & Shim Stack
  3. Shaft / Rod
  4. Floating / Separator Piston
  5. Suspension Oil
  6. Compressed Nitrogen Gas

Bespoke Engineering

Nitron doesn’t adapt a generic damper to fit the W176 A-Class or C117 CLA-Class; they engineer one around each platform. Every application goes through a dedicated development process, with components, spring rates, and damping characteristics engineered around the specific platform rather than the category it belongs to. Geometry, weight distribution, and suspension travel are factored into the design from the start, not compensated for after the fact. The result is a kit built for these models specifically, not one that was built broadly and happens to fit.

Features

Internal reservoir type
2-way combined adjustment
Full alloy body
Preload adjuster
Combined 24 clicks of adjustment
Nitrogen gas charged
Precision bearing spacers supplied as required
Consists of 4 coilover assemblies and top mounts
Hand made to order

Specifications

Coilover Type: NTR-R1
Adjustment Type: 2-way combined
Adjustment: 24 clicks combined
Rear Suspension Types: OEM
Droplinks Included: No
Recommended Spring Rates:
- FRS – Fast Road Spec:
  - Front: 400lbs/inch (70N/mm)
  - Rear: 457lbs/inch (80N/mm)

Applications

Mercedes-AMG CLA 45: C117 | 2013-2019
Mercedes-Benz A 45 AMG: W176 | 2013-2018
Mercedes-Benz A 220 4MATIC: W176 | 2015-2018
Mercedes-Benz A 250: W176 | 2013-2018
Mercedes-Benz A 250 4MATIC: W176 | 2013-2018
Mercedes-Benz CLA 220 4MATIC: C117 | 2019-2019
Mercedes-Benz CLA 250: C117 | 2013-2019
Mercedes-Benz CLA 250 4MATIC: C117 | 2013-2019

Other Suspension Kits for W176 / C117 A-Class & CLA-Class

NTR-R3 Coilover Kit

Notes

Does not fit Shooting Brake X117 CLA-Class models
Custom spring rates also available, please contact us directly here for more information or for a consultation on custom rates
Images used for illustration purposes only. Specific details, finishes and end fittings may differ from that shown.
Precision bearing spacers supplied as required

Frequently Asked Questions

How does the combined adjustment work on the R1? A single knob controls compression and rebound simultaneously across 24 clicks. Turn it toward firm for more aggressive driving and back it off for everyday road use. There is no need to manage two separate dials, which keeps setup straightforward without sacrificing the ability to meaningfully change how the car feels.
Do the spring rates differ between the A-Class and CLA-Class applications? Nitron recommends 400lbs/inch front and 457lbs/inch rear across both the W176 A-Class and C117 CLA-Class applications in Fast Road specification. Custom rates are available if your build or use case calls for something different.
How does the NTR-R1 differ from the NTR-R3 on these platforms? The R1 uses a single combined adjuster for compression and rebound across 24 clicks, keeping setup simple and accessible. The R3 separates high speed compression, low speed compression, and rebound into three independent circuits, giving drivers and engineers the range to properly develop a setup across different circuits and conditions. The R1 suits road-focused drivers who want meaningful improvement without complexity; the R3 suits those who want full development capability.

About Nitron Suspension

Nitron Suspension has been at the forefront of precision suspension engineering since 1998, founded by Guy Evans with the goal of building high-performance shocks for enthusiasts and professionals alike. Over 200 dealers now carry Nitron products across Europe, Asia, the US, Australasia, and Africa. In 2008, the company moved into a dedicated facility in the UK’s Motorsport Valley, adding dynamometers, 5-axis CNC machines, and 3D CAD capabilities to support both growing demand and continued product development. A second expansion came in 2023 with a new office in Murrieta, California. The team behind every Nitron product draws from deep backgrounds in machining, materials technology, hydraulics, bike engineering, and F1 racing, with many engineers bringing firsthand experience as competitive drivers and riders. That depth of knowledge across both the technical and competitive sides of motorsport shapes every product Nitron develops.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Nitron NTR-R1 Coilover Kit for W176 / C117 Mercedes-Benz A-Class and CLA-Class [NTCMB010R1]

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Nitron NTR-R1 Coilover Kit for W176 / C117 Mercedes-Benz A-Class and CLA-Class

Unique Technology

Bespoke Engineering

Features

Specifications

Applications

Other Suspension Kits for W176 / C117 A-Class & CLA-Class

Notes

Frequently Asked Questions

About Nitron Suspension

Reviews