BMX buying guide
You want to buy a BMX bike but aren't sure which size fits your height? With the KHEbikes size guide you'll quickly find the right category – whether for kids, teens or adults.
Which BMX size matches your height?
BMX sizes are given in inches and directly correspond to rider height. Find the right category here:
For 20 inch BMX bikes, the top tube length is key for the perfect fit:
20" frame from approx. 4'7", 20.6" from approx. 4'11", 21.25" for tall riders from approx. 6'1".
Go to our 20 inch models here:
Still unsure about the size or which bike to choose? Our KHEbikes Support Team will be happy to help you anytime.
Lightweight Aluminium BMX Bikes – Perfect for Beginners & Advanced Riders
Aluminium BMX bikes are the ideal choice for beginners, kids and young riders looking for a particularly lightweight and agile freestyle BMX. Unlike steel, aluminium frames are rustproof, low maintenance and – thanks to their low weight – allow faster progress with tricks, jumps or first riding attempts. Especially for young riders, this means: more control, more safety and more fun.
At KHEbikes, our 2025 LL (Light Line) models offer smartly designed aluminium bikes – equipped with aluminium handlebars, 3D fork, aluminium cranks and sealed Euro bottom bracket. This makes the bikes not only ultra-light but also durable and easy to maintain. Some 20" models even feature a freecoaster hub – perfect for fakie tricks.
A special highlight: many of our aluminium models feature the patented KHE AFFIX rotor, allowing 360° barspins with active brakes – no more rotor plates or cable tangles.
Frequently asked questions about aluminium BMX bikes
What are the advantages of an aluminium frame?
Aluminium is lighter than steel and rustproof. For kids and beginners, this means: easier to carry and better control while riding.
How strong are aluminium BMX bikes?
Our aluminium models are reinforced for BMX use. Thicker tubing walls compensate for the lower elasticity compared to steel and ensure high durability – even under tough use.
Are there 20-inch aluminium BMX bikes?
Yes! Our 20-inch aluminium models are also suitable for taller riders and allow real freestyle riding with low weight.
At what age is an aluminium BMX bike recommended?
From a height of approx. 95 cm (3'1") – for example with a 14-inch model – children can already benefit from the lightweight and easy handling.
Disciplines & uses for aluminium BMX bikes
Our aluminium freestyle BMX bikes are ideal for:
- Park: Very light for tricks on ramps and skateparks – ideal with rotor and U-brake setups.
- Street: Perfect for beginners, easy to manoeuvre over curbs and rails.
- Pumptrack: Lightweight saves energy while pumping and enables smooth runs.
- Flatland: Aluminium frames like on the KHE Tricky offer great control and are extremely light – ideal for balance and technical tricks.
For big jumps in the dirt category (dirt mounds and jumps), many riders prefer steel frames (HiTen or CrMo), as they are more elastic and absorb hard landings better.
Accessories, protection & beginner tricks
Especially for kids and beginners, the right protective gear is essential. We recommend a BMX helmet and gloves for optimal grip and safety. In our BMX accessories section you’ll also find kickstands, retro pads, pegs and sticker sets – perfect for tuning and upgrading your bike.
For first tricks, techniques and tutorials, check out our KHE beginner videos. We’ll guide you step by step to help you get started with BMX – ideal for kids and newcomers!
Conclusion: Aluminium BMX bikes from KHE – lightweight, strong, well-designed
Whether as your first BMX or a lightweight upgrade: with an aluminium model from the LL or AL line by KHEbikes, you get a high-quality BMX with top features – directly from the manufacturer, with free return shipping and personal support.
Discover now: Lightweight aluminium BMX bikes in 14", 16", 18" & 20" – ready to ride!

Google Reviews
135 Reviews

09/01/2025
Beautiful, robust bikes and absolutely top-notch customer service. Very helpful both by phone and email, and there's a solution for every issue! It's great to still have such great and positive shopping experiences every now and then. Thank you, dear KHEbikes team!

03/01/2025
My previous review was worse. The reason for this is that I've encountered a lot of poor providers in the past, and so I simply share my negative experiences. I was contacted immediately after my first review, which I personally thought was really great. It immediately showed that the customer is their top priority. A big thumbs up for that.

29/12/2024
Great service, fast delivery, no problem exchanging. Top company!

04/09/2024
Great bikes at fair prices and great customer service!

03/08/2024
Very pleasant contact, I'm very impressed with the staff. The purchase process is easy, and the description is accurate. The order arrived very quickly, but unfortunately, there was some shipping damage, but it was replaced without any major problems.

16/02/2024
Very friendly and excellent support. @KHEbikes - thank you very much

21/12/2023
Over the years, we've had nothing but positive experiences with their products and service! Unfortunately, no race bikes or parts, which would make the product range perfect. Highly recommended!

07/12/2023
Very friendly contact, excellent advice. Even a question about the assembly of the BMX bike I purchased was answered the same day (Sunday!). That's how you retain customers long-term. I certainly won't have ordered the last bike from you. 😊 Thank you very much.

28/11/2023
Very friendly and very helpful. I contacted them via email and received a prompt response with good advice and a purchase recommendation. I'd be happy to come back.

22/09/2023

21/09/2023
Very quick, uncomplicated help. My contact, Mr. Göring, was very nice.

21/09/2023
Fast, competent, and friendly. Best service

16/09/2023
the attention is good even if you have a problem they support you so that everything goes well

18/04/2023
Despite the remote diagnosis, we received excellent advice. After a few emails and photos back and forth, the problem with the bike was identified, and we were able to fix it ourselves. Our son is incredibly happy to be able to ride a BMX again. Now that's what I call customer service! Very friendly, dedicated, and competent!

06/04/2023
Top customer service, super clear homepage :)

27/01/2023
Top-notch advice! Always happy to come back!

13/01/2023
Super fast delivery, great customer service, and very satisfied with the BMX. Thank you very much!

03/01/2023
Thanks to excellent advice over the phone, we were able to order the right spare parts for our son's BMX bike. They assured us of prompt shipping, so he was able to happily use his bike again the following week. Many thanks to Mr. Stubenrauch for the great advice!

20/08/2021
My son is thrilled with the design of his BMX bike. After I had trouble assembling it (especially the brakes), I contacted KHEbikes. Absolutely fantastic, friendly, and fast service, which solved the problem! I'm truly thrilled and can only recommend KHEbikes! 5 stars ⭐️⭐️⭐️⭐️⭐️