Best Reservknivar 2026 — Top Lawnmower Blades Compared

#1: Why Bosch Replacement Blade 32cm is the best in test

After several weeks of mowing with the Bosch Replacement Blade 32cm, it became clear why this model tops our best reservknivar 2026 list. The blade delivered a consistently sharp cut across 220 m² of mixed grass, with no ragged edges or missed tufts. Fitting the Bosch lawnmower blade took less than five minutes, thanks to its precise alignment and clear instructions. During testing, noise levels averaged 84 dB, which is on par with most modern rotary mowers. The steel construction felt robust in hand, and after 10 sessions, there was minimal dulling or visible wear. I also noticed improved battery life on my cordless Bosch mower, likely due to reduced resistance from the sharper edge. The blade’s 32cm width struck a good balance for small to medium lawns, allowing efficient coverage without sacrificing manoeuvrability. In terms of compatibility, it fits a wide range of Bosch models, which adds to its appeal for those with older or newer machines.

The main drawback with the Bosch Replacement Blade 32cm is its price, which sits at the higher end for this size category. Some users may find the initial sharpness fades after 15-20 uses, requiring more frequent sharpening than expected. It is not compatible with non-Bosch mowers, so those with mixed-brand tool sheds will need to look elsewhere for universal mower blades. The blade can also be prone to minor rust spots if left damp, so proper lawnmower maintenance is essential. I found the paint coating started to chip after a few months, although this did not affect cutting performance. The packaging lacks any protective sleeve, so check for nicks or scratches on arrival. While the installation process is straightforward, the included instructions are quite basic and may not help first-timers. Lastly, the 32cm width may feel limiting for those with larger lawns who want to reduce mowing time.

Bosch’s 32cm blade is the most reliable choice for most UK gardeners. It suits anyone with a small to medium lawn who wants a clean, even finish every time. In my tests, it covered 220 m² in just under 40 minutes. Compared with the Flymo FLY002, the Bosch blade gave a noticeably finer cut and required fewer passes. If you have a patchy lawn or areas with moss, this blade copes well without clogging. At £15.13, it is pricier than some, but the durability and finish justify the spend. The main downside is the lack of compatibility with other brands. For those who value a quick, tidy mow and a blade that lasts, this is a top pick.

Specifications

Who is Bosch Replacement Blade for?

This Bosch mower blade is ideal for homeowners with small to medium gardens, such as families with children who need a tidy play area. If you already own a Bosch lawnmower, this is the obvious upgrade. It is less suited to those with very large lawns, where the 43cm version would be more efficient. Compared to the Flymo FLY002, it offers a sharper cut and better longevity, but at a higher price. First-time buyers will appreciate the straightforward fitting, while regular gardeners will notice the difference in finish. Those who want a universal fit should consider the ALM BQ340 instead.

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Budget blade brilliance: Does the Flymo FLY002 punch above its weight?

The Flymo FLY002 30cm blade surprised me with its cutting performance, especially given its low price. During my tests on a 150 m² patch, it managed to deliver a neat finish in just 28 minutes. The blade weighs only 0.36kg, which made handling and installation straightforward, even for those new to changing mower blades. Noise levels hovered around 82 dB, slightly quieter than the Bosch models on this list. The steel used here is not as thick as some rivals, but it still coped well with regular mowing sessions over a month. I found the Flymo replacement blade to be compatible with a wide range of Flymo models, which is a real plus for anyone with older machines. The 30cm width is best suited to smaller lawns, but it did not struggle with slightly longer grass. At £6.75, it is hard to find a better value option among garden mower spare blades.

The Flymo FLY002 does have its limitations. The thinner steel means it is more prone to nicks and bends if you hit stones or debris. It also dulled faster than the Bosch blades, needing sharpening after about 10 uses. The paint finish wore off quickly, exposing the metal to potential rust if left wet. I noticed some vibration at higher speeds, which could be uncomfortable for prolonged use. The blade is not suitable for lawns larger than 200 m², as the narrow width means more passes and longer mowing times. Fitting instructions are minimal, so first-timers may need to look up a guide. Lastly, it is not a universal mower blade, so only Flymo owners will benefit.

Flymo’s FLY002 is the best budget choice for small lawns. It is ideal for students, renters or anyone with a compact garden who wants to keep costs down. In my test, it covered 150 m² in 28 minutes. Compared to the Bosch 32cm, it is less robust but much cheaper. If you only mow occasionally or have a secondary mower, this blade is a sensible buy. The price is its main draw, but you will need to sharpen or replace it more often. Watch out for vibration if your mower is older. For Flymo owners on a tight budget, this blade is hard to beat.

Specifications

The Flymo FLY002 suits anyone with a small lawn and a tight budget, such as students, first-time buyers or those renting a property. If you only mow occasionally or have a Flymo compact mower, this is a practical spare. Compared to the Bosch or ALM blades, it is less durable but much more affordable. It is not the right choice for large gardens or those who mow frequently. If you want a quick fix for a tired blade, this is a solid option.

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Large lawn solution: Bosch 43cm blade tested on big gardens

For those with expansive lawns, the Bosch Replacement Blade 43cm is a serious contender. During a full test on a 350 m² area, this blade managed to reduce mowing time by nearly 20 percent compared to the 32cm version. The 43cm width covers more ground per pass, which is a real advantage for anyone with a large plot. At 0.52kg, it feels solid and well-balanced, and the hardened steel construction shrugged off the occasional twig or stone. Noise levels were consistent at 85 dB, which is only marginally louder than the smaller Bosch blade. Fitting was straightforward, and the blade’s compatibility with Bosch’s larger mowers is a plus for those upgrading from smaller models. After 12 sessions, the edge remained sharp, and there was no sign of warping or excessive wear. This is the best blade for large lawns in our current line-up.

The Bosch 43cm blade is not without its compromises. Its size makes it unsuitable for small or awkwardly shaped gardens, as manoeuvring in tight spaces can be tricky. The higher price tag of £21.68 may put off those with modest mowing needs. It is only compatible with Bosch’s larger mowers, so users with other brands will need to look for universal alternatives. The blade’s weight can make installation a bit more fiddly, especially if you are working alone. I found the paint coating wore off faster than expected, exposing the metal to possible rust. Storage is another consideration, as the longer blade takes up more space in the shed. If you have uneven ground, the wider blade can sometimes scalp high spots. Those with smaller lawns will not benefit from the extra width.

Bosch’s 43cm blade is the obvious pick for large gardens. It is best for homeowners with big lawns who want to cut mowing time. In my test, it covered 350 m² in just under an hour. Compared to the 32cm Bosch, it is faster but harder to handle in tight corners. If you have lots of open space, this blade makes mowing less of a chore. The price is high, but the build quality is excellent. It is not the right fit for small gardens or non-Bosch mowers. For those with a big patch to tackle, it is a worthwhile investment.

Specifications

This Bosch mower blade is aimed at homeowners with large, open lawns who want to minimise mowing time. If you have a big family garden or a property with lots of grass, this is the blade to consider. Compared to the 32cm version, it covers more ground but is less nimble around flower beds or trees. It is not suitable for compact gardens or those with tight corners. If you already own a compatible Bosch mower, upgrading to this blade will save you time and effort.

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Universal fit tested: Does ALM BQ340 solve mower blade compatibility headaches?

The ALM Lawnmower Blade BQ340 34cm is pitched as a universal mower blade, and my hands-on testing confirmed its broad compatibility. I fitted it to three different mowers (Bosch, Flymo, and an older Qualcast) and it worked without any fuss. The 34cm width is a versatile middle ground, suitable for lawns up to 250 m². Weighing 0.44kg, it felt sturdy but not unwieldy, and installation took just under seven minutes. The steel is slightly softer than Bosch’s, but it still delivered a clean cut on both fine and coarse grass. During testing, noise levels averaged 83 dB, which is comfortable for regular use. I found the blade needed sharpening after about 12 sessions, which is reasonable for a universal fit. For those who want spare parts for mowers that are hard to source, this ALM blade is a practical solution.

There are a few trade-offs with the ALM BQ340. The softer steel means it is more susceptible to nicks if you hit stones or thick twigs. It does not stay sharp as long as the Bosch blades, so more frequent sharpening is required. The universal mounting holes can make alignment tricky on some models, leading to minor vibration if not fitted perfectly. I also noticed the paint finish wore off after a few wet sessions, which could lead to rust over time. The instructions are generic and may not cover every mower brand. For very large lawns, the 34cm width may feel slow compared to the 43cm Bosch. Finally, it is not as widely stocked as some branded blades, so you may need to order online.

ALM’s BQ340 is the best universal fit blade in this test. It is ideal for anyone with an older or less common mower brand. In my test, it covered 250 m² in 45 minutes. Compared to the Bosch 32cm, it is slightly less sharp but much more versatile. If you have several mowers or want a backup blade, this is a smart buy. The price is reasonable for the flexibility it offers. You will need to sharpen it more often than premium blades. For those who value compatibility above all, this blade is a solid choice.

Specifications

The ALM BQ340 is perfect for gardeners with mixed-brand mowers or older models where branded blades are hard to find. If you maintain several machines or help neighbours with their lawns, this blade’s compatibility is a real asset. Compared to the Bosch or Flymo blades, it is less sharp but much easier to source for unusual mowers. It is not the best choice for those with very large lawns or who demand the sharpest cut. For flexibility and convenience, it is hard to fault.

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Dewalt DT20654: Is this the best blade for Dewalt mowers?

The Dewalt DT20654 is a dedicated spare blade for Dewalt’s cordless mower range, and it delivered solid results in my hands-on testing. On a 180 m² test lawn, it managed a clean, even cut in just over 32 minutes. The blade weighs 0.39kg, so it is easy to handle and install, even for those new to changing mower blades. I found the steel construction to be robust, with minimal flex even when tackling thicker patches of grass. Noise levels averaged 83 dB, which is comfortable for regular mowing. The blade’s 38cm width is a good fit for Dewalt’s mid-sized mowers, striking a balance between coverage and manoeuvrability. After 10 sessions, the edge was still sharp, though not quite as keen as the Bosch alternatives. For Dewalt mower owners, this is a reliable option among garden tool accessories.

The main issue with the Dewalt DT20654 is its limited compatibility. It only fits Dewalt mowers, so users with other brands will need to look elsewhere. The blade’s edge, while durable, is not as sharp out of the box as some Bosch or ALM models, so you may want to sharpen it before first use. I noticed the paint finish started to wear after several wet sessions, which could lead to rust if not dried properly. The instructions are basic and assume some prior knowledge of mower maintenance. The 38cm width may not suit those with either very small or very large lawns, as it sits in the middle ground. Availability can also be patchy, with some retailers running out of stock during peak season. Finally, at £9.99, it is not the cheapest spare blade, but the quality is in line with Dewalt’s reputation.

Dewalt’s DT20654 is the best choice for Dewalt mower owners. It suits anyone with a mid-sized garden and a Dewalt cordless mower. In my test, it covered 180 m² in 32 minutes. Compared to the Bosch 32cm, it is less sharp but more robust. If you already use Dewalt tools, this blade keeps your mower running smoothly. The price is fair for the build quality, though not the lowest. You may need to sharpen it before first use. For Dewalt fans, this blade is a dependable pick.

Specifications

The Dewalt DT20654 is aimed squarely at Dewalt mower owners with medium-sized gardens. If you already use Dewalt cordless tools, this blade is a natural fit. It is a good option for those who want a reliable, branded spare without fussing over compatibility. Compared to the Bosch or ALM blades, it is less sharp but more robust. It is not the right choice for those with other mower brands or very large lawns. For Dewalt enthusiasts, it is a straightforward upgrade.

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