Beinn 20 Small / Age 5+

Rated 4.90 out of 5 based on 10 customer ratings
(10 customer reviews)


SOLD OUT – Sorry, there will not be more available.

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Designed for riders with a minimum inseam of 18 ½  inches and height of 44 inches. Please reference our size guide or call us at 503 954 2410 to ensure you get the perfect sized bike for your child.

For delivery information, click here.


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The perfectly proportioned and very lightweight Beinn 20 small can be built up as a stylish hybrid, mountain or road bike.

  • Weight: 17 lbs, 10 oz (including pedals)
  • Lightweight 7005 T6 aluminum frame, proportional geometry
  • Chromoly forks
  • 7-speed, wide-ratio Sram X4 gears with light action shifter
  • Short-reach brake levers with V-brakes give powerful, light action braking for small hands
  • Lightweight wheels with quick release hubs
  • Multi-surface, lightweight tires with puncture resistance and reflective sidewalls
  • Exclusive, child-specific component set
  • Each bike comes with a complimentary spare tube
  • Each Beinn comes equipped with a bell and a quality hex wrench set

Sizing for your Beinn 20 Small

Designed for riders 5 years and older with a minimum inside leg of 18 ½  inches.

Click for information on how to measure up for an Islabike.

With the correct size bike, your child will develop their cycling skills quickly, easily and safely while being more comfortable on their bike. Not only does this help increase confidence and boost their self-esteem, but, best of all, it means they can start riding straight away.

For expert sizing advice please call our customer service team at 503 954 2410.

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Why Islabikes?

Key features

Full specification

This bike has been designed to be ridden by kids on smooth paved, grassy, or dirt surfaces with moderate gradients. It is not intended for any kind of jumping. 

Max weight: Combined rider and luggage 77 lbs, 3 oz.

10 reviews for Beinn 20 Small / Age 5+

  1. Rated 5 out of 5


    I got the 20″ small for my recently turned five year-old for Christmas and she loves it. We do too. We bought her the 14″ last September but she has outgrown it. It is and was a great bike, as are all Isla Bikes, but this is even better because now it has gears and larger wheels making it even easier to go up hills and it allows her to bike for longer periods. She is also old enough to understand now how to use the hand breaks. She goes biking along side me while I go running and where before I had to give her pushes up hills she now is able to do much of it on her own. I will say that although my daughter learned to bike without training wheels at 3 years and 3 months old she is a complainer and not that strong so Isla Bikes enable her to go further and up hills and gives her confidence. I know they are expensive but so worth it for your young ones to develop confidence and skill on a bike. If you are an active family then there is nothing better than an Isla Bike. I learned the hard way by buying heavy bikes from other stores and randomly discovered Isla Bikes and would never consider another type for my child.

  2. Rated 4 out of 5


    Bought the 20 small for my son Christmas of 2014. First impressions were 5 stars. Fit and finish were superb with clean welds. I do not think there is a lighter weight bike for the money. My son LOVES this bike. It has the gears but still has the feel of a BMX that he can jump and have fun on. His friends mocked the Islabikes name until he smoked them on it because it is half the weight of the tanks they were riding. Now that it has been over a year since he has had it I have to take away one star because the shifting got out of wack jumping gears, and not shifting cleanly into gear right away. I had it tuned and It did not stay in tune long and it is a problem again. The seat is also terrible. I understand the quest for low weight but I think they should have added a few ounces to the seat so my son can still have children when he is older. I am glad to see Islabikes has added colors because at the time I bought this one you could have any color you wanted as long as it was red. I also hate the Presta valves on the tires but a cheap adapter took care of those. Overall this is an excellent bike and worth every penny. If you want your kids to enjoy riding, and use their bike more, and smoke all the other kids in the neighborhood skip the Walmart junk and buy them an Islabike. I raced BMX as a kid and I know that light weight is the single most important factor.

  3. Rated 5 out of 5


    i just purchased my 4th Islabike for my kids over the span of the past 3 years. They are awesome. As a dedicated bike rider myself, i can appreciate the quality of the product and the practical consideration that goes into the design. The price is not cheap, but you get what you pay for. These bikes can be handed down, sold, etc as they hold up for a long time. They are significantly lighter than cheaper bikes which makes a huge difference in my kids’ enjoyment of biking, riding up hills (me carrying the bikes), etc, etc. Glad to see the different colors, since i had to paint an older version since my twins did not want the “same bike”…. Also recommend the fenders (on the 20+) since it keeps the kids much cleaner. Another recommendation is to buy the spare tube when you make a purchase since i had a tough time finding one of the proper size when we had a flat. Keep up the good work.

  4. Rated 5 out of 5

    Matthew Ehrlich

    After watching our 5 year old struggle with a heavy beginner bike, we purchased the Cnoc 16. The lighter weight, and smaller handle grips have really made learning how to ride much more fun. Money well spent. Thank you!

  5. Rated 5 out of 5


    I purchased the 20″ small for my five year old. She just fits on it with the seat almost all the way down so there is lots of room to grow. Like others I did wonder if the price was worth it, but took a chance because I just could not buy another of those princess bikes that are not built well. This bike is absolutely beautiful and so well made. It is nicer than I actually expected. The parts are all very good quality, the bike is stunning in the orangey red and my daughter loves it. I especially love the wheels; a great hybrid of a road and off trail tire. Perfect for a kid who will go from the street to grass to a mountain bike trail. It took my daughter an hour or two to get used to this bike because it was a bit bigger than her last one and it is much faster with each pedal so the power of it took time to learn. I would buy an adult version of an Islabike if they sold it. Bravo for a quality product.

  6. Rated 5 out of 5


    We purchased a Beinn 20 Small 2 years ago for my (then) 6 year old daughter. We live in a hilly area and the gears really helped her conquer some of the bigger climbs. The bike is beautiful and the proportionally sized parts really help kids fit on the bike correctly. The frame, bars, grips, levers, crank, seat and even the pedals are kid-sized.

    Now after 2 years of use and abuse I cleaned the bike, handed it down to my younger daughter (6 yo) and purchased a Beinn 24 for the (now) 8 year-old. The Beinn 20 still looks new and my youngest is delighted to have gears.

    From what i can see on our local family biking group, the resale of these bikes is very high so it’s difficult to argue that the cost is that much higher than a cheap, junky kids bike. The weight, fit, parts quality, and durability is well worth the cost.

  7. Rated 5 out of 5


    We love this company, and their products. We purchased 14,16, small 20 next will be big 20! I do believe this is one of the best bikes on the market for kids. My son has special needs and also low muscle tone, He handles his bike perfectly.

  8. Rated 5 out of 5

    Robert Neall

    Islabikes are outstanding. From my experience they are the best child’s bike on the market hands down. We purchased the Beinn 20 small for our 5 year old 2.5 years ago and he has loved it and so have we. They are designed from the ground up with small sized components unlike most children’s bikes that use more cost effective standard adult components but on a smaller frame. But the best part is their relative light weight. Ours is only 17 lbs. Every comparable name brand children’s bike I looked at (Trek, Diamondback, Schwinn, Giant, Raleigh, etc) were all 5-10 pounds heavier. For a child who only weighs about 40-50 pounds themselves a 5-10 pound difference is gigantic. It would be like an adult bike weighing 50 pounds heavier. Try to ride that and you would be frustrated very quickly. And it wouldn’t be safe to ride a 100 pound bike. Neither is it safe for them to ride a bike that weighs 1/2 of what they do. Finding and getting the lightest possible bike for a child makes all the difference. Islabikes are the lightest I could find. Our son immediately was able to go up hills and across terrain he had always given up on before. We have handed it down to his younger sister and she immediately took off with it. She was so excited to have gears. We had started her on the Cnoc 14 when she was only 3 and she learned to ride it in short order. But having the gears was superb.

    My son wanted a front shock because he thinks they look cool. He does not need a shock because he is so light weight it doesn’t do him any good and add about 5 lbs to the weight. Don’t get one with shocks.

    Trying to decide, This was a helpful review Yes, they are expensive and it seems hard to justify the expense when they are kids and will only use it for a short while. But it is the difference between learning the joy of riding and riding it every chance he got or having the bike sit around most of the time because it is too heavy and so much work to go up the hills. He has ridden it so much he wore out the first set of break pads in two years.

    The only down side is that they do not grow with the child and he has outgrown the bike. 🙁

  9. Rated 5 out of 5


    Highly recommended!!! I bought this bike for my 12 year old daughter (now 13) who has dwarfism. She’s very active and enjoys riding bikes but as she gotten older the bikes that fit her are kiddish and do not perform very well. It was incredibly difficult to find a bike that fit her properly, performed well (gears were a must!) and looked age appropriate. The appearance & quality of the components on the Beinn 20 exceeded expectations!!! She is very proud of her new bike! Also, the Islabikes team has been very responsive and helpful to help me find the right model & size for her.

  10. Rated 5 out of 5


    It’s been 3 years since we bought the Bienn 20–when our boy was a shorter-than-typical 6yo; We *love* it! The geometry of the Bienn 20 allowed us to get him on a light-weight, *geared* bike super early. That boosted his overall riding abilities, and range he was comfortable riding in, which really increased viable riding routes near us. It allowed him to explore the world around him much more, and enabled our whole family to go out riding together, enjoying cool family time more often. He’s developed so much confidence riding it, and is so much more in command than his peers (who’re on single-speed bmx bikes, or some pretty nicely featured, but heavy mountain bikes). The gears allow him to *not quit* when the hills get steep, (and his friends have to bail and walk). He’s darn close to placing first in the local kids bike race against bigger and older kids , and *super* proud about that (next year…I’m putting racing slicks and a bigger crank ring on his bike, and we’ll see who’s first…).

    Our “growth chart wall” says he was just barely 44″ tall when we got the Bienn 20, which is the bottom of the recommended height. He had already gained years of experience on single-speed 12″ coaster brake bikes, so getting on the Bienn 20 was an exercise in transitioning to shifters/gears and handbrakes. We found the grip shifters to be tough for him at first, but he quickly got over that…the intuitiveness of seeing the numbers on the shifter helped him figure out which way to turn it without having to guess.

    Fast forward–3 years later, he’s a 51.5″ tall (24″ inseam) 9yo. The Bienn 20 has tires nearly worn through the carcass on some skid spots. He still loves this bike, and can continue to ride it for another year as he hasn’t really outgrown it (the 50″ max height is pretty flexible–you don’t want to *start out* over 50″, but you can certainly be taller than 50″ and be comfortable on this bike). But our youngest is turning 6, and now fits the Bienn 20. So, to get the whole family on geared bikes, we’re transitioning our 9yo to the next viable option, so we can get two kids’ riding out of one Bienn 20.

    And for our oldest…he’s big enough and in control enough to skip the 24″ models, and jump right into the 26″ model. According to growth charts, the Bienn 26 ought to last him till he’s past 14yo. I figure we’ll have his Bienn 26 till he either breaks it, or exceeds the weight capacity. But again, according to growth charts, I’m not sure which’ll come first…a replacement bike…or college.

    I know the Islabikes are expensive, but the way I see it, we avoided wasting $$s on crappier 16″ bikes, going straight to the Bienn 20…and avoided the 24″ bmx bike phase entirely. We skipped straight from 12″ to 20″ and now are skipping from 20″ straight to 26″ (Note: I’m *still* riding a 26″ Surly Big Dummy). If two bike purchases can cover riding from the age of 6yo to the beginning of college…I don’t mind *some* splurging on the two bikes (let’s face it…compared to some adult bikes…this is a *modest* splurge). When he’s ready to…we’ll be swapping in a decent shock fork and knobbies if by then he wants to do some of the more challenging singletrack around us…and some racing slicks if he wants to smoke his peers in a race. The 26″ tire size gives us plenty of tire high-quality tire options. But I digress. The Bienn series has proven to be a high-value and flexible and series of bikes to grow on, and has served our family extremely well. The components are good quality stuff, low cost to maintain and repair. I’m super happy with Islabike’s products.

    /cheerlead mode off/

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