Engwe O20 Boost (2026 - ) review

The O20 Boost has a low step-through aluminum alloy folding frame finished in your choice of three colours – Graphite Gray (the colour of our loan bike), Dusty Blue, and Soft Purple. The matte paint is set off by the occasional flash of chrome finish, but in the main it’s a one-colour bike that turned some heads and invited more than a few ‘stop and ask’ sessions with fellow bikers on the Nicky Line cycle route through Hertfordshire. You get suspension on the front wheel and in the seat post, but none on the back wheel. It is a folding commuter bike but its fold points are nicely hidden in the design, which we liked, and the battery is a very obvious block stashed behind the seat post. So, you get a good-looking folding frame, a drop-down steering column, foldable pedals, and a magnetic locking pad to keep the bike securely closed when folded. There’s also a small rack over the back wheel which is an integrated part of the bike’s frame, rather than an accessory you have to shell out for. It has a two-fork stand underneath the pedals, which props the bike up in a stable ‘front wheel up’ position, and cable management is good with little tangle risk.

The O20 Boost’s 10-level adjustable seatpost and wide handlebars will comfortably fit riders that range in height from five feet to over six. However, our six-foot test rider did feel like the seat post would have been more comfortable being positioned a few centimetres back on the frame. In the main, most people of average height will find the upright riding position perfectly comfortable.

When folded down, the bike is approximately 86x51x84cm in size making it easy to get on trains, store in narrow hallways, car boots or campervans. At 26 kg it’s not the lightest of bikes (although it’s way lighter than Engwe’s 35 kg L20 3.0 we reviewed last year), but is still relatively easy to wheel about when folded. The rear rack can carry an additional 15 kg capacity and the stable center-mounted dual-leg kickstand keeps the bike from rolling off… although the ‘front wheel up’ stance it puts the bike in lets the front wheel flop round on itself. It’s a minor quibble, but the flopping wheel can put a bit of strain on the cables, and made it tricky to get proper side-on pictures. The removable battery is heavy, but should fit in most rucksacks so you can carry it with you.

The five assisted pedalling presets are driven by a road-legal 250W rear hub motor, which really works hard to keep you moving and is a louder motor than previous Engwes we’ve ridden. A few times we noticed some lag in the motor’s response, and there were a couple of awkward moments when we experienced the motor not responding at all to pedal input – although turning it off and on again fixed it. Our preferred setting was level three, which gave us good assistance on flatter ground without making us feel lazy. For harder inclines we found five made most hills feel like a bump. The bike is equipped with dual-piston hydraulic disc brakes and 160 mm rotors (front and rear), which provide good stopping power once we’d bedded them in.

Boy, do we miss the suspension on the back wheels of Engwe’s L20 3.0… because seat post suspension does make for a bit of a bumpy ride. However, the big battery sits flush with the seat post and suspension on the back would have interfered with it. So, the trade-off is a big battery with loads of range for a sore bum… although only after a long ride. On the front wheels you have a nice hydraulic suspension fork with 50 mm of travel and adjustable lockout. The 20-inch tyres are billed as ‘anti-puncture urban hybrid tyres’ built to handle tarmac, gravel paths, and light dirt trails, and they do. The eight-speed gears allows for some control, although we just left it in eighth gear and allowed the assisted pedalling to get us going. Really, there’s very little to complain about. It’s not meant for off-roading or prolonged use, it’s meant for loads of short journeys on roads and paths between charging sessions, and it handles that well.

The great big 48V LG battery located behind the seat post provides a lot of range – up to 141 km on pedal assist setting one, up to 108 km on setting three, and around 80 km on setting five. In the box you get a four-amp recharging cable that can completely charge the battery in around 3.5 hours at home or in the office. The low purchase price of £1,199 (usually discounted to £999) is a strong tick in its box, too, and a Cycle to Work scheme will make it doubly affordable.

The O20 Boost is solidly built although the one-year warranty might make you pause for thought when you consider that lots of other electric bikes come with two years as standard. As covered earlier, we did encounter a couple of times where the motor refused to lend any assistance (despite being set at level three) and we had to turn the whole system on and off again to fix it. Those incidents aside, we didn’t experience anything else to suggest the bike isn’t reliable during daily use, although we’ll update this review in a few months to see if power loss is a repeat issue.

The O20 Boost comes with Engwe’s standard one-year warranty covering most of the bits you’d expect, although the headlights, taillights and some other parts only get six months or less – so read the small print. Engwe does offer an extended warranty for another year at the point of sale, which is probably money well spent if you’re going to use it a lot, and service it at an officially approved centre to prevent voiding your warranty. Although you can head back to the dealer you bought it from if you encounter any issues.

Aside from the features already covered in the other sections of this review, the O20 Boost comes with a centrally-mounted 3.5-inch color LCD screen with Bluetooth connectivity and smartphone app integration via the Engwe App. It’s a crisp and clear screen, something we’ve noticed all Engwe electric bikes we’ve tested have. The bike also has a little storage cubby for tracking tags compatible with Apple and Android devices. You also get front headlights and rear lights to round out the equipment list.

You’ll buy the Engwe O20 Boost because it’s a well-priced answer to the common folding electric bike must-haves. It’s easy to truck about when folded, nice and light to ride, has a good battery, five pedal assist settings, and is comfortable enough for most average-height riders. Even with an entry price of around £1,199 (often discounted to around £999) the overall package feels premium, and in this highly-competitive budget bracket that makes it well worth a look.