Frog Bikes

Best Mountain Bikes For Kids

MTB for Kids

Frog MTB

“There’s a science behind it all…”Frog Bikes

Frog is a family run business based in the UK and focused on producing outstanding quality bikes for kids. Don’t worry if you are outside the UK, you can pick up one of their bikes through a local supplier if you decide a Frog bike would be appropriate for your child.

Working with Sport Scientists at Brunel University, UK, Frog have reformed the thinking behind children’s bike design and they continually push modifications.

The man behind the bike geometry, Dr Tom Korff explains, “our bikes are not scaled down adult bikes, as children are not miniature adults. At Frog, we put the child into the center and design our bikes around the child’s unique anatomy and his/her unique needs”.



Frog Bikes | Bikes in Detail

Frog Mountain Bikes are part of the “Push The Limits” range for older children. These MTBs are the perfect multi terrain bikes for off-road cycling. With junior specific components, including a tailored suspension fork for lighter riders, these mountain bikes provide a smoother ride for any junior.

Let’s look at the Frog 62, an excellent bike for beginner and intermediate riders and, a comparatively budget-friendly option for families with kids who want to ride the trails. Frog bikes are only slightly heavier than some bikes, but they return a great ride, handle challenges on the trail reliably and, they have picked up several prestigious industry awards.

Some reviewers even think they out-perform some higher-end mountain bikes their kids have used.

The Frog 62 is ideal for most 8 to 10-year olds. If your children are older, consider the 69 or 72 models. Check out Frog’s sizing guide below to find the model that will fit your child.

The Specs:

24″ air suspension fork including lockout and damping control

24″ inch wheels (for kids aged 8-10)

Easy reach hydraulic brakes

Shimano rapid-fire 9 speed shift lever

Weight 24.9 lbs (11.29 KG)

Wide handlebars for extra stability


Solid and stable while remaining lightweight

Patented Frog cranks make pedaling easy, even on challenging ascents.

Quality air suspension fork works well and helps with confidence on bumpy or technical trails

Lock-out on the shock and damper adjustments enable the bike to manage most terrain.

A great price for an entry mountain bike

Quick release seat stem adjusts easily, and the long stem allows plenty of room for growth.

Specifically made for kids (not a small-sized adult bike).

Rapid-fire shifter makes gear changing easy and helps train kids.

Internal cable routing so kids aren’t catching the cables when riding

Tires work well for the trails and everyday riding

Minus Points

The Kenda tires are positive in dry conditions but in wet and damp climates it may be necessary and beneficial to consider a tire suited to these conditions. The right tires are essential and will help young riders to develop confidence.

Kids Bike Size Chart & Frame Size

  • Take the time to measure the rider’s inside leg – it’s easy to do:
  • Stand the child in socks against a wall
  • Place a small book between their legs, as high as is comfortable
  • Ask the child to move away and measure from the top of the book to the floor

Once you have measured the inside leg, use the table below to find the right size of bike for your child. Please note; Frog gives the AVERAGE inside leg length for each bike, with the saddle at its lowest setting (there is tolerance on each side of this).

At this height, the child will safely and comfortably be able to get their feet on the ground without pushing against the top tube. Don’t worry – Frog Bikes have long seat posts, so the saddle can be raised a long way as the rider grows.

If you can get to a local Frog supplier you will be able to assess the fit of the bike, sizing advice and ongoing service and support. Stores also have access to Frog’s FrogFit App, where arm length, inside leg measurement and a rider’s confidence level together inform the model recommendation. You can also download the App from the App Store for free if you can’t get to a store.

Size Chart

Model Average inside leg in cm (in) Approx age Wheel Size Frame Size
Tadpole Mini 24cm (9″) 1-2 10″
Tadpole 31cm (12″) 2-3 12″
Tadpole Plus 38cm (15″) 3-4 14″
Frog 40 40cm (16″) 3-4 14″ 9″
Frog 48 48cm (19″) 4-5 16″ 9.5″
Frog 52S 52cm (20″) 5-6 20″ 10″
Frog 52 52cm (20″) 5-6 20″ 10″
Frog 55 55cm (22″) 6-7 20″ 11″
Frog 62 62cm (24″) 8-10 24″ 12″
Frog 69 69cm (27″) 10-12 26″ 14″
Frog 73 73cm (29″) 12-14 26″ 16″
Frog 78 78cm (31″) 13+ 26″ 18″
Frog Road/Track 58 58cm (23″) 6-7 20″ 11″
Frog Road/Track 67 67cm (26″) 8-12 24″ 14″
Frog Road/Track 70 70cm (27″) 11-14 26″ 17″
Frog MTB 62 62cm (24″) 8-10 24″ 12.5″
Frog MTB 69 69cm (27″) 10-12 26″ 15″
Frog MTB 72 72cm (28″) 13+ 26″ 16″

Making sure every Frog has a home!

Frog has a positive attitude to the environment too and because Frog Bikes continue to hold their value, they has a pre-loved programme for used Frog Bikes, to make sure every bike has a home! Whilst making it easy to trade up, Frog are helping to keep bikes out of landfill.

Where to Buy

Leisure Lakes Bikes (LLB) and Tredz Limited have some great offers across the Frog range and with Black Friday deals already started, now is the perfect time to look to make some great savings.

Tredz currently have an additional special if you buy a kid’s bike. They are offering a £30 voucher toward a future purchase. Here’s a thing . . . if you do buy a bike and need a helmet. Wait for the voucher before you buy the helmet. You will only be waiting a couple of days.

Affiliate Links

Please understand that I will receive a small commission if you decide to buy from Tredz or LLB but know that the price you pay always remains the same.

Frog UK

Here’s the link to Frog UK so you can check out this outstanding company yourself. Once on the site, you can switch to your own region in the top right corner by clicking on the flag.

Questions and Comments

Getting the right bike for your child is essential and if you have questions or comments you will always receive prompt support and guidance if you need it. Your questions often assist other readers too.

Just Ride Hard, Ride Fair, Nobody Hurt

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18 thoughts on “Best Mountain Bikes For Kids

  1. Okay! This seems interesting enough. I really wish to get my son a bike and I got a little wavy when trying to get the perfect bike that suits them perfectly and can also be used for all their wants. I really like this here. Thank you so much for sharing here. If for one thing, the frog bikes are close to being perfect for my kids. I will check them out

    1. Great news. There are a lot of kids riding Frog bikes Rodarrick. Let me know if you need help at any point. Thank you for your comments, they’re much appreciated. Steve

  2. Thank you so much for the honest review! I really want to get my two kids a good bike and your review is awesome!  Mostly because you were honest about the tires.  These bikes look like they have beautiful design too.  If I do decide to go with these bikes, what kind of tires do you recommend?  Like what brand?

    1. You’re welcome Jessie and, thank you for your comments. I agree the Frog bikes do look pretty cool and kids do love them. The brand of tire on the bike is very positive but like I said, not the best for wet / muddy conditions. All quality brands have tires to suit all conditions and terrain types. My favorites are Maxxis but I also use Kenda and WTB. Different tires for different rides but there is no need to swap and change with kids unless extreme conditions demand that.

      There is a post about tires here that might help

      Otherwise, fire plenty of questions. I’m always happy to help. Best regards, Steve C

  3. I think that the frog company has really done a great job to put out this awesome mountain bikes for kids. The safety and every other feature are all very much in check. I like the fact that the company has been up for a while.  I want to know if it’s really safe for kids to mountain bike or if the normal biking is just the perfect one for them.

    1. Hi Henderson, Thank you for your comments. Yes, it’s safe for kids to mountain bike so long as some work goes on before they get out on the trails. Much depends on their general riding ability. I published a post earlier that talks about this very subject and would love to know what you think.

      Best regards, Steve

  4. The Frog mountain bike for kids sounds like the perfect bike for kids and teens! I’m so glad I found your page! 

    Every year for as long as I can remember I have bough both my boys new bikes for either their birthday or Christmas about every other year; some years I would have to replace the bikes after only one year! My boys can be quite rough on their bikes but even still I do not believe, for the price of a bike, it should need replacing so often. This year I planned to change the game and just get much better bikes for them. I do not want to have to replace them until a larger sized bike is necessary. The frog could be the answer to my problem 🙂 

    I am a little confused on the book technique for measuring the inner leg. I am assuming a book about the size of the bike seat should be used when measuring? Thanks so much!

    1. Hi Shannon, thank you for commenting. It’s very much appreciated. My sons are on adult bikes now and are kinder to the bikes than they used to be. I feel your frustration. That said, Frog make great bikes and they are designed for children on the trails so you will get value for money. Remember that they have long seat-posts too so a little growth won’t spoil the fit of the child to the bike.

      To answer about measuring, stand them against a wall and place a book beneath their crotch. Then, measure from the top edge of the book down to the floor. Hope this helps. Best regards, Steve

  5. I‌ love Frog bikes! I‌’ve bought one for my nephew and I‌ want to get one for his sister, as well. She’s nine, so I‌ guess that would be the perfect bike for her. I’ll ask her mom to measure her, though, just to be safe. Thanks for the chart, I‌ appreciate it!

    1. Hi Kate, there are many Frog lovers out there and it’s great to see bikes that are designed with children in mind. Don’t forget you can use the App too, it really helps with sizing. Best regards, Steve C

  6. My girls are not that old but they started riding right from a very young age and now they sometimes go biking with me and it’s always very interesting to do something like that with your children. I like Frog MTB bikes, the specs are very nice and really enticing, likewise the pricing. I think this will be a perfect gift to get for my girls, I’ll work around it as soon as I’m able to. Thanks.

    1. Hi Wildecoll, Thanks for your positive comments. If you need any help or guidance, I’m always happy to help. I think your girls will be thrilled with Frog bikes…. I think the name is pretty cool too. Best regards, Steve C

  7. Great to see the UK cycle market putting time in to development of child specific bikes. Adult and child geometry is a completely different setup. Personally I feel the market is normally driven by scaled down bikes so that the parent can buy a bike for their child that is the same as theirs. Leisure Lakes and Tredz are two of the Leading online bike suppliers in the UK. I like Leisure Lakes because they are true to their roots and they still believe in old fashioned service. Do you think this is why they have gone in to child specific bikes? I have purchased and serviced many bikes over the years and unfortunately people tend to head to the retail park to buy bikes when, they can get a much better quality product from these specialist suppliers. Thanks for the post. Mark

    1. Hi Mark, Thank you for your comments, I appreciate them very much and I agree entirely that child specific bikes are an excellent development. Leisure lakes are clearly supportive of these bikes and checking their website, I see that they have 21 Frog MTB’s and I agree that they do believe in offering great service. One of my uncles had a business in the bike retail / service industry and just going into his shop was a positive experience. He always took time to help people and explain the detail. Sadly this is severely lacking in some retail park stores. A store local to here never offers help or guidance, it’s on the shelves, buy it if you want it seems to be their attitude. This is one of the reasons why I have this business, I get to help people where they need it and being able to do that is a great bonus.

      Best regards,


  8. I wish I‌ had a bike like this as a kid. It seems awesome. But at least I‌ can buy one for my brother. I’m not sure if I‌ have to buy 62 or 69, so I’ll probably have to go to a local store to make sure it fits.

    Of course, I‌’ll buy it online since it’ll probably be cheaper. I‌ kinda feel bad when I‌ do this, but since it’s more expensive on the store what I’m supposed to do?

    1. Hi Alicia, Thank you for commenting on this post. Yes, size is very important and if you can get your brother to sit on a Frog bike you will get a good idea about fit. Remember that Frog aren’t scaled down adult bikes so it’s best to find one if you can in your area. The Frog site should be able to help you source one.

      True, it’s often cheaper online and people do need to save where they can. The retail world has changed but I too feel sorry for the smaller businesses who can’t compete so well globally.

      Best regards, Steve C

  9. Hi Steve,

    Thanks for sharing your review of the best mountain bikes for kids. My sons 4th birthday is approaching and I’d like to learn to ride before he starts at school. The frog 48 sounds like it may be the ideal option, I’ll be checking them out online to take advantage of the black Friday deals early.

    1. Hi Nate, thank you for your comments and happy 4th birthday to your son when the day arrives. The Frog 48 does look great and designed especially for children too. I’m sure you or he won’t be disappointed. Best regards, Steve

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