Our verdict
The "I already own Ryobi" mower. If your shed has 5+ Ryobi 18V tools, this slots in beautifully. Otherwise the 18V platform is overworked here and a 40V/56V rival cuts better.
Pros & cons
Pros
- Runs on Ryobi 18V ONE+ batteries
- Hundreds of compatible Ryobi tools
- Battery resale is decent
- Lightweight
Cons
- Twin-battery design halves runtime if one is older
- 40cm cut narrow for medium lawn
- Plastic feels cheap
Full specs
| Type | Cordless |
|---|---|
| Cut width | 40 cm |
| Engine / Power | Ryobi 18V brushless |
| Weight | 17 kg |
| Deck | Plastic |
| Self-propelled | No |
| Rear roller | No |
| Mulching | Yes |
| Cutting heights | 6 positions |
| Bag capacity | 45 L |
| Suited to lawn | Medium |
| Noise level | 75 dB |
Buying second-hand
£100–180 used — strongly check both batteries individually. Mismatched battery pairs (one new, one tired) give 10 minutes of runtime. Insist on a real-world cut test. Ryobi ONE+ batteries are the most counterfeited — buy from a seller who can show original receipts.
Where to buy the Ryobi RY18LMX40A
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Repair-cost reference
UK 2026 ballpark prices for the parts you're most likely to need on this mower. OEM is dealer-genuine; aftermarket is what you'll find on eBay or generic small-engine suppliers. Use these to sense-check any quote and to negotiate on used buys.
| Part / job | OEM | Aftermarket |
|---|---|---|
|
Replacement 40cm blade
Annual sharpening is free; replace when bent or cracked.
|
£24–£32 | £8–£12 |
|
Replacement battery
Wear part — typical 3–5 years to 80% capacity. The biggest single repair cost on any battery mower.
|
£90–£180 | £55–£120 |
Fair-offer calculator
Tell us about a specific used listing for the Ryobi RY18LMX40A you're looking at. We'll compute a fair offer range from our used-market data and the condition signals you provide.
Calculations are guidance, not gospel. Used-market prices vary by region (Scotland is typically 10–15% cheaper than the South-East), season (October cheapest, March most expensive), and seller motivation.
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