The Details

Please note, any warranty claims arising from this product will need to be facilitated either direct through the manufacturer, or via a local Cube dealer. This is because we are no longer an authorised Cube dealer, and are therefore unable to process warranty claims through them. We are still able to process warranty claims for third party components such as Shimano for example. This does not affect your warranty, or your statutory rights.


The Acid 240 Allroad has been fitted with a number of innovative features. Mudguards to keep the kids clean when riding in wet weather and LED lights improve safety when riding in the dark.

The kids mountain bike also features a suspension fork which absorbs the lumps and bumps and gives the rider greater control. Furthermore, the front brake has been fitted with a power modulator to reduce the risk of flying over the handlebars when braking heavily.

The bike is also ideal for taking on a variety of terrain. With a 7-speed shimano gear system, there are plenty of gears to chose from, and a 34T ring on the cassette is ideal for taking on steeper climbs.

Built from the same heat-treated 6061 aluminium tubes as Cube's adult bikes, the Acid 240 Allroad's frame is every bit as tough as a full-size mountain bike, but with the right weight and proportions for a child. The handling is also designed to encourage both fun and confidence.

Key features:

  • LED lights
  • Fork suspension
  • Mudguards
  • Lightweight aluminium frame
  • 7-speed shimano gear system
  • Power modulator

Our Verdict

The Cube Acid 240 Allroad 2022 Aluminium Kids MTB is fun, safe and includes all the accessories your child is ever likely to need, allowing them to take on their next cycling adventure with success.

Key Specifications

Key Specifications

  • Frame - Aluminium Lite 6061
  • Fork - SR Suntour SF15, 60mm
  • Drivetrain - Shimano SL-RS45, Revo Shift
  • Brakes - Alloy V-Brake with Powermodulator

Full Specification

  • Frame - Aluminium Lite 6061
  • Fork - SR Suntour SF15, 60mm
  • Number of Gears - 7
  • Shifters - Shimano SL-RS45, Revo Shift
  • Chainset - Samox, 32T, 152mm with Chainguard, Aluminium
  • Chainrings - 32T
  • Cassette - Sunrace MFM300.7, 13-34T
  • Chain - KMC HV500
  • Rear Derailleur - Shimano RD-M310, 7-Speed
  • Pedals - Not included
  • Rims - Aluminium
  • Front Hub - Shimano DH-T4000-1N, Hub Dynamo, QR
  • Rear Hub - CUBE Aluminium, QR, 28H
  • Front Tyre - CUBE IMPAC Smartpac, 2.1
  • Rear Tyre - CUBE IMPAC Smartpac, 2.1
  • Front Brake - Alloy V-Brake with Powermodulator
  • Rear Brake - Alloy V-Brake with Powermodulator
  • Handlebars - CUBE Aluminium Lite, 590mm
  • Grips - Velo
  • Headset - CUBE FPH863, Semi-Integrated
  • Stem - CUBE Aluminium Lite
  • Saddle - CUBE Kid
  • Seatpost - CUBE Aluminium Lite
  • Post Clamp - CUBE Varioclose, 31.8mm
  • Weight - 12.4kg
  • Front Light - Büchel Country LED
  • Rear Light - LED Steady Light
  • Kickstand - Center Kickstand, Adjustable
  • Mudguard - Sunnywheel SW-613F/R, Snap-On
  • Bell - ACID
  • Manufacturers disclaimer - Please note that, based on component availability and other factors, specifications are subject to change without notice.

Sizing Information

Kids Bike Size Guide

Encourage your kids to explore their neighbourhood by bike – it builds confidence and independence, and sets them up for a lifetime of healthy, active living. Getting the right-sized bike is crucial – children grow fast, but don’t be tempted to pick a bike that your child will “grow into” – if the bike is too big, then it’s going to be uncomfortable and difficult to control.

How do I choose the right size bike for my child?

For the best fit, we recommend measuring your child’s inside leg length. You can also use the age ranges below as an approximate guide.

Then, use the size chart below to match your child’s measurements to the manufacturers’ recommended frame size. Rest assured that every bike size recommended below will allow your child to comfortably and safely place their feet on the ground.

Kids bike sizing chart (Unisex)

Approx Age Min Inside leg Wheel Size
1-2 years 24cm / 9" 10” 
2-3 years 31cm / 12" 12”
3-4 years 38-43cm / 15-17" 14"
4-5 years 48cm / 19" 16"
5-7 years 52-58cm / 20-23" 20"
8-12 years 62-67cm / 24-26" 24”
10-14 years 69-78cm / 27-31" 26"

 

How do I measure my child’s inside leg length?

 

Ask your child to stand upright with their back against a wall, in their socks. Place a book/ruler between their legs, level with their crotch. Then measure from the floor to the top of the book/ruler, in centimetres or feet and inches.

Q & A

My child is in between sizes – which one should I choose?

Always choose the right size of bike for your child today – don’t be tempted to pick a bike that’s a bit too big, in the hope that your child will grow into it. If the bike is too big, then your child will find it uncomfortable and difficult to control. This can really knock a child’s confidence when they’re just establishing their bike-riding skills. Good quality kids’ bikes, like Frog Bikes, are fitted with a long seatpost, so there’s plenty of scope to move the saddle up as your child grows.

How are kids’ bike sizes calculated?

Most kids’ bike sizes are based on wheel size; a few brands (eg. Frog Bikes) size by minimum inside leg length (so a Frog 52 is suitable for a child with an inside leg length of at least 52cm, and should continue to fit until the child’s leg length increases to 55cm. At this point, they can move up to the Frog 55).

What if I buy the wrong size?

Rutland Cycling is the world’s largest Frog Bikes dealer, and we stock many other kids’ bikes, too. If you’re buying a kids’ bike online, then the information above will help you order the right size child’s bike. For ultimate peace of mind, we offer a 90-day returns policy (for unused products), and a 30-day test ride*, so if the bike isn’t right for your child after having ridden it, you can exchange it for another model. If you live nearby, you can visit any of our stores, where our helpful staff are fully trained in the art of children measuring.

*Not available on sale items, or items purchased on Finance.

 

Got a question

If you have any questions about bike sizing, our expert team is here to help. Call us on 0330 555 0080, use our Live Chat, or email us.

Delivery

Standard Delivery - FREE on all bikes*

Bikes are given a full pre-delivery inspection and delivered 95% built, with only pedals to be fitted and handlebars to be adjusted. Sent via a 24 hour courier service in a best in sector bike cargo box with wheel braces and wrapped in 100% recyclable protective packaging to prevent damage during transit.

*Some off-shore locations and areas of Scotland may incur a surcharge of £39.99. Please check shipping cost before checking out, these areas may also have an extended lead time.

 

Premium Delivery  - £99.99

Our Premium same-day bike delivery service is our quickest and best delivery service; once despatched, you'll receive your new bike later that same day with a personalised delivery slot to suit you. Your bike will come fully built and 100% ready to ride, with any accessories you've ordered fitted too. Our Customer Care team will call to arrange a delivery day and a personalised delivery slot to suit you. There are no middlemen or distribution centres - your new bike will come from Rutland Cycling, direct to your doorstep. Plus, there is minimal packaging to dispose of!

 

Same Day Premium bike delivery at Rutland Cycling

 

Click & collect - FREE on ALL bikes

Our Click & Collect service offers all the benefits of shopping online, combined with an award-winning retail experience in one of our stores. Simply order your items, select Click & Collect and pick up your item at a time that's convenient for you - our stores are open 7 days a week. Best of all, the service is completely free.

Please note, any warranty claims arising from this product will need to be facilitated either direct through the manufacturer, or via a local Cube dealer. This is because we are no longer an authorised Cube dealer, and are therefore unable to process warranty claims through them. We are still able to process warranty claims for third party components such as Shimano for example. This does not affect your warranty, or your statutory rights.


The Acid 240 Allroad has been fitted with a number of innovative features. Mudguards to keep the kids clean when riding in wet weather and LED lights improve safety when riding in the dark.

The kids mountain bike also features a suspension fork which absorbs the lumps and bumps and gives the rider greater control. Furthermore, the front brake has been fitted with a power modulator to reduce the risk of flying over the handlebars when braking heavily.

The bike is also ideal for taking on a variety of terrain. With a 7-speed shimano gear system, there are plenty of gears to chose from, and a 34T ring on the cassette is ideal for taking on steeper climbs.

Built from the same heat-treated 6061 aluminium tubes as Cube's adult bikes, the Acid 240 Allroad's frame is every bit as tough as a full-size mountain bike, but with the right weight and proportions for a child. The handling is also designed to encourage both fun and confidence.

Key features:

  • LED lights
  • Fork suspension
  • Mudguards
  • Lightweight aluminium frame
  • 7-speed shimano gear system
  • Power modulator

Key Specifications

  • Frame - Aluminium Lite 6061
  • Fork - SR Suntour SF15, 60mm
  • Drivetrain - Shimano SL-RS45, Revo Shift
  • Brakes - Alloy V-Brake with Powermodulator

Full Specification

  • Frame - Aluminium Lite 6061
  • Fork - SR Suntour SF15, 60mm
  • Number of Gears - 7
  • Shifters - Shimano SL-RS45, Revo Shift
  • Chainset - Samox, 32T, 152mm with Chainguard, Aluminium
  • Chainrings - 32T
  • Cassette - Sunrace MFM300.7, 13-34T
  • Chain - KMC HV500
  • Rear Derailleur - Shimano RD-M310, 7-Speed
  • Pedals - Not included
  • Rims - Aluminium
  • Front Hub - Shimano DH-T4000-1N, Hub Dynamo, QR
  • Rear Hub - CUBE Aluminium, QR, 28H
  • Front Tyre - CUBE IMPAC Smartpac, 2.1
  • Rear Tyre - CUBE IMPAC Smartpac, 2.1
  • Front Brake - Alloy V-Brake with Powermodulator
  • Rear Brake - Alloy V-Brake with Powermodulator
  • Handlebars - CUBE Aluminium Lite, 590mm
  • Grips - Velo
  • Headset - CUBE FPH863, Semi-Integrated
  • Stem - CUBE Aluminium Lite
  • Saddle - CUBE Kid
  • Seatpost - CUBE Aluminium Lite
  • Post Clamp - CUBE Varioclose, 31.8mm
  • Weight - 12.4kg
  • Front Light - Büchel Country LED
  • Rear Light - LED Steady Light
  • Kickstand - Center Kickstand, Adjustable
  • Mudguard - Sunnywheel SW-613F/R, Snap-On
  • Bell - ACID
  • Manufacturers disclaimer - Please note that, based on component availability and other factors, specifications are subject to change without notice.

The Cube Acid 240 Allroad 2022 Aluminium Kids MTB is fun, safe and includes all the accessories your child is ever likely to need, allowing them to take on their next cycling adventure with success.

Sizing Information

Kids Bike Size Guide

Encourage your kids to explore their neighbourhood by bike – it builds confidence and independence, and sets them up for a lifetime of healthy, active living. Getting the right-sized bike is crucial – children grow fast, but don’t be tempted to pick a bike that your child will “grow into” – if the bike is too big, then it’s going to be uncomfortable and difficult to control.

How do I choose the right size bike for my child?

For the best fit, we recommend measuring your child’s inside leg length. You can also use the age ranges below as an approximate guide.

Then, use the size chart below to match your child’s measurements to the manufacturers’ recommended frame size. Rest assured that every bike size recommended below will allow your child to comfortably and safely place their feet on the ground.

Kids bike sizing chart (Unisex)

Approx Age Min Inside leg Wheel Size
1-2 years 24cm / 9" 10” 
2-3 years 31cm / 12" 12”
3-4 years 38-43cm / 15-17" 14"
4-5 years 48cm / 19" 16"
5-7 years 52-58cm / 20-23" 20"
8-12 years 62-67cm / 24-26" 24”
10-14 years 69-78cm / 27-31" 26"

 

How do I measure my child’s inside leg length?

 

Ask your child to stand upright with their back against a wall, in their socks. Place a book/ruler between their legs, level with their crotch. Then measure from the floor to the top of the book/ruler, in centimetres or feet and inches.

Q & A

My child is in between sizes – which one should I choose?

Always choose the right size of bike for your child today – don’t be tempted to pick a bike that’s a bit too big, in the hope that your child will grow into it. If the bike is too big, then your child will find it uncomfortable and difficult to control. This can really knock a child’s confidence when they’re just establishing their bike-riding skills. Good quality kids’ bikes, like Frog Bikes, are fitted with a long seatpost, so there’s plenty of scope to move the saddle up as your child grows.

How are kids’ bike sizes calculated?

Most kids’ bike sizes are based on wheel size; a few brands (eg. Frog Bikes) size by minimum inside leg length (so a Frog 52 is suitable for a child with an inside leg length of at least 52cm, and should continue to fit until the child’s leg length increases to 55cm. At this point, they can move up to the Frog 55).

What if I buy the wrong size?

Rutland Cycling is the world’s largest Frog Bikes dealer, and we stock many other kids’ bikes, too. If you’re buying a kids’ bike online, then the information above will help you order the right size child’s bike. For ultimate peace of mind, we offer a 90-day returns policy (for unused products), and a 30-day test ride*, so if the bike isn’t right for your child after having ridden it, you can exchange it for another model. If you live nearby, you can visit any of our stores, where our helpful staff are fully trained in the art of children measuring.

*Not available on sale items, or items purchased on Finance.

 

Got a question

If you have any questions about bike sizing, our expert team is here to help. Call us on 0330 555 0080, use our Live Chat, or email us.

Standard Delivery - FREE on all bikes*

Bikes are given a full pre-delivery inspection and delivered 95% built, with only pedals to be fitted and handlebars to be adjusted. Sent via a 24 hour courier service in a best in sector bike cargo box with wheel braces and wrapped in 100% recyclable protective packaging to prevent damage during transit.

*Some off-shore locations and areas of Scotland may incur a surcharge of £39.99. Please check shipping cost before checking out, these areas may also have an extended lead time.

 

Premium Delivery  - £99.99

Our Premium same-day bike delivery service is our quickest and best delivery service; once despatched, you'll receive your new bike later that same day with a personalised delivery slot to suit you. Your bike will come fully built and 100% ready to ride, with any accessories you've ordered fitted too. Our Customer Care team will call to arrange a delivery day and a personalised delivery slot to suit you. There are no middlemen or distribution centres - your new bike will come from Rutland Cycling, direct to your doorstep. Plus, there is minimal packaging to dispose of!

 

Same Day Premium bike delivery at Rutland Cycling

 

Click & collect - FREE on ALL bikes

Our Click & Collect service offers all the benefits of shopping online, combined with an award-winning retail experience in one of our stores. Simply order your items, select Click & Collect and pick up your item at a time that's convenient for you - our stores are open 7 days a week. Best of all, the service is completely free.