Cube Acid 240 Hybrid Youth: kids e-bike first impressions

E-bikes (aka electric bikes, or e-assist bikes) are becoming increasingly popular – they’re a great way to make cycling more accessible to a wider population, especially in areas where there are hills, or for people who for whatever reason find riding a normal pedal bike difficult. However, the focus to date has been on adult e-bikes – probably due to a mixture of the cost and complexity of creating a children’s e-bike, so we were really excited to see a 24″ wheel kids e-bike at the 2018 Cycle Show – the Cube Acid 240 Hybrid Youth.

Cube Acid 240 Hybrid Youth

The Cube Acid 240 Hybrid Youth on display was an early model for demo purposes as it’s not due for release until April 2019, so unfortunately we couldn’t get a sneaky ride on it this time – but we were able to ask lots of questions about the bike.

Cube are making use of the same technologies and design features on the 24″ wheel kids e-bike as on their full size adult Acid Hybrid bikes, which means it uses a Bosch Active drive unit with a Purion controller, and a 400Wh battery.

Cube Acid 240 Hybrid Youth battery pack

As a total novice to e-bikes, I have to confess to not having a clue what this means in terms of performance, so after a bit of questioning, this is what I learnt from the team at Cube.

The Cube Acid 240 Hybrid uses Shimano’s easy-shifting 9 speed transmission mated to a 40 Nm Bosch Active motor, which puts power to the rear wheel. The power on the 24″ wheel bike is less than that found on the equivalent adult bike, but the lower power to weight ratio of the rider should mean that the battery performance is about the same on the adult and kids bikes.

I’m guessing a big concern that parents will have about an e-bike is battery life.  Cube told us that the estimated battery life is about 3 and a half hours on undulating trails, or else it’s capable of one climb of 1,500m.   Given your Cycle Sprog won’t need the motor for the descent back down, this should be enough for a decent spin out.

Cube Acid 240 Hybrid Youth Bosch Purion Display Unit on a kids e-bike electric mountain bike

The Cube Acid 240 Hybrid Youth will be supplied with a 2 amp charger, which should provide a full charge in 8 hours, but Cube also sell a 4A charger for £50 which would halve the charging time.

I was slightly concerned about the weight of the e-bike (18.5 kg) and whether a child would be able to manoeuvre it. However, the Acid 240 Hybrid comes with a ‘walk assist’ mode for this purpose. This is obviously all well and good when there is still charge in the battery, so you’d have to be very careful not to be out on the trail for too long.

Given that the UK law prohibits kids to ride e-bikes on the public roads under the age of 14, any 24″ wheel kids e-bike is going to have to be for purely off road use. As with the majority of e-mtb bikes, the centre of gravity should be low giving a stable platform from which to have fun with.

Cube Acid 240 Hybrid Youth at Cycle Show 2018

The bike itself is built around a Cube aluminium Superlite frame, with Shimano MT200 disc brakes and SR Suntour XCT JR forks which give 80mm of travel. There’s an FSA Metropolis 38-tooth chainset with appropriate length crank arms that hooks up to a 9 speed Shimano drivetrain using an M3000 Acera rear derailleur and M2000 Altus shifter to change between the ratios on the Shimano 11-36T cassette.

The Cube Acid 240 Hybrid is planned to go on sale in April 2019, with a price of £1,599. If you follow us on Facebook or sign up for our newsletter we’ll let you know when the bike becomes available in the UK.

I’d love to hear what you think about this bike.  Are you tempted to get your Sprog one?  Or do you prefer good old fashioned pedal power? Do leave a comment below.  Thanks!

Other posts you should read whilst you’re here:



Hi I’m trying to purchase one of these. If anyone has one in stock new or used I would love to buy it. Thanks. 07968822793


My 10 year old lad have recently had one for his birthday and loves it and is now able to join my on most of my rides as regards to battery life turbo gives him a 50 mile range and eco 138 miles about time bike manufacturer start to help out the young generation with easier bike’s to learn on

Dan Beattie

I have the same for my son and it’s fantastic. e-bikes are the best innovation in bikes since the mountain bike. I do have a question though. On ours the walk assist doesn’t work. Is this because it’s a kids bike or do I need to take it I to the shop to get looked at?


Hi Dan. I’ve checked with Cube and they haven’t included the walk-assist feature on the bike. Kind regards, Karen


Hi Dan, So glad your son is enjoying his ebike. I’m just checking this out with Cube and will get back to you. Karen

Mr S

Heaven forbid, ebikes have to be the biggest white elephant going – but to impose these on children….
Surely it defeats the whole point of learning to ride a bike. I also worry about young children struggling to push these behemoth bikes around after the batteries go flat. 3.5 hours charge just ain’t enough


I can see these being popular for children who don’t have the ability to pedal any distance – will make cycling more accessible for these families. However, I don’t think this is the market they’re aiming at! I’m also worried about battery life – it will be very heavy once it runs out.

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