Create a flawless striped lawn with the Cobra RM51SP80VX. This 20" (51cm) self-propelled rear roller mower is powered by Cobra’s twin 40V MAX+ battery system, delivering strong, quiet, and low-maintenance performance.
The full-width rear roller produces a traditional striped finish, while 6 cutting heights from 17mm to 75mm let you tailor the cut to your lawn. A tough steel deck adds durability, and the large 70L grass bag reduces the need for frequent emptying. With its wide cutting path and powered drive, the RM51SP80VX is ideal for larger lawns and cordless convenience.
20" Twin 40v Max Plus Li-ion Lawnmower with Rear Roller
Create a flawless striped lawn with the Cobra RM51SP80VX — a high-performance 20" (51cm) self-propelled rear roller mower, designed for those who want the perfect finish with the convenience of cordless power. Powered by Cobra’s advanced twin 40V MAX+ lithium-ion battery system, this mower delivers the robust performance of petrol without the noise, emissions, or ongoing maintenance.
The full-width rear roller not only creates a classic striped effect but also provides added stability, allowing you to mow right up to edges with precision and confidence. With a 6-stage cutting height adjustment ranging from 17mm for a close, fine finish to 75mm for tackling longer, tougher grass, the RM51SP80VX gives you full control over your lawn’s appearance throughout the seasons. Height adjustment is quick and simple via a single lever, conveniently positioned next to the rear roller for ease of use.
A durable steel deck offers long-lasting strength and reliability, while the wide 51cm cutting path ensures faster coverage of larger areas, reducing mowing time. The generous 70-litre grass bag means fewer interruptions to empty clippings, and its high-performance direct collection system ensures efficient pickup, leaving your lawn clean and tidy after every pass.
Designed for ease and comfort, the self-propelled drive system makes mowing virtually effortless — especially on uneven ground — and the ergonomically positioned controls give you intuitive command over the mower's pace and direction. Despite its size, the RM51SP80VX remains well-balanced and manoeuvrable, making it suitable for larger domestic gardens that demand a professional finish.
Whether you're looking for cordless convenience, powerful performance, or a beautifully striped lawn, the Cobra RM51SP80VX delivers all that and more — with the trusted engineering and innovation Cobra is known for.
Cobra RM51SP80VX Feature Highlights:
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TWIN 40V MAX+ SYSTEM
Built into the battery pack, this smart system recognises the specific Cobra tool in use and optimises output for peak efficiency. 40V Max+ batteries are high-performance, long-running, and fast-charging—and one battery fits all tools in the range.
The Cobra RM51SP80VX uses twin 40V Max+ batteries to deliver a powerful 80V of performance, ensuring longer run times and the strength to tackle tougher mowing tasks with ease.
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51cm / 20" CUTTING DECK
The Cobra RM51SP80VX is equipped with a robust 20" (51cm) steel cutting deck, built for durability and high-performance mowing. This wider deck, paired with a precision-engineered blade, delivers a clean and consistent cut with every pass. Ideal for larger lawns, the 51cm width offers excellent coverage while still allowing for confident control—perfect for achieving a crisp, professional striped finish.
ONE BATTERY - ENDLESS POTENTIAL
This Cobra 40v MAX PLUS advanced lithium-ion technology powers a comprehensive range of garden tools, including lawnmowers, strimmers, blowers, chainsaws, and a versatile 5-in-1 multi-tool. The 40V MAX PLUS battery is engineered for seamless compatibility across Cobra’s entire 40VX range.
My experience with Cobra's customer service has been nothing short of exceptional, earning them a well-deserved five-star rating. From the moment I reached out with inquiries about their products to the post-purchase support, Cobra's customer service team has consistently gone above and beyond to ensure my satisfaction. They are knowledgeable, courteous, and genuinely dedicated to helping customers find the perfect solution for their lawn care needs.
Nicola Bicknell - 10/10
Excellent Lawnmower From Cobra
Having owned many other Cobra hand tooIs, I recently made the exciting decision to invest in a Cobra lawnmower, and I must say, it has exceeded all my expectations. This remarkable machine has truly transformed the way I approach lawn care, serving as an indispensable tool for producing a beautiful finish on my lawn.
David Jones - 10/10
Cobra RM51SP80VX Feature Highlights:
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BEAUTIFUL STRIPED FINISH
Equipped with a full-width rear roller, the Cobra RM51SP80VX is built to deliver a classic striped finish across larger lawn areas. The 20" (51cm) cutting width combined with the rear roller gives your garden a professional, well-defined look, while also enhancing stability when mowing along borders and edges. This allows you to mow confidently right up to flowerbeds and pathways, helping you maintain crisp, clean lawn stripes with ease.
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17-75mm CUT HEIGHTS
With a fully adjustable 6-stage cutting height range from 17mm for a clean, low finish, up to 75mm for tackling longer, more demanding grass, the Cobra RM51SP80VX offers the flexibility needed to suit a wide range of lawn conditions. Height adjustment is quick and simple thanks to the single lever positioned conveniently next to the rear roller. This intuitive setup gives you full control over your mowing finish, making it easy to adapt to changing conditions.
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SELF-PROPELLED DRVIVE
The Cobra RM51SP80VX offers effortless control and smooth, consistent handling, even across larger lawns and more demanding terrain. Its balanced design and powerful self-propelled drive system reduce operator fatigue, helping you maintain a steady pace with minimal effort. Whether you're mowing around borders, flower beds, or lawn edges, this mower delivers the precision and stability needed to achieve a flawless finish.
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ERGONOMIC CONTROLS
The Cobra RM51SP80VX offers smooth handling and effortless control, even across larger lawns and more challenging terrain. Its balanced design and powerful self-propelled drive system reduce operator fatigue, maintaining a consistent pace with minimal effort. The ergonomically positioned controls ensure comfortable operation, allowing you to confidently manoeuvre around borders, flower beds, and lawn edges. Designed for both performance and ease.
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EFFORTLESS CONTROL
The Cobra RM51SP80VX is built with a well-balanced design that enhances manoeuvrability, even across larger lawns and more demanding terrain. Despite its generous 51cm cutting width, the mower remains easy to handle, offering smooth and responsive control throughout. The combination of balanced weight distribution and a self-propelled drive system reduces strain on the operator, making it easier to maintain a steady pace and achieve a clean, professional finish with minimal effort.
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70LTR GRASS BAG CAPACITY
The Cobra RM51SP80VX is equipped with a spacious 70L grass bag, allowing you to cover more ground with fewer stops to empty clippings. Its high-performance collection system ensures excellent pickup and a clean, tidy finish on every pass. Ideal for medium to large lawns, it delivers efficient, uninterrupted mowing, helping you maintain a perfectly manicured lawn with ease.
