Mongoose Legion L20 2020 - BMX Bike
- ShowProduct Information For over 45 years, Mongoose has been in the dirt, at the park, and on the street! We offer a variety... read more
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For over 45 years, Mongoose has been in the dirt, at the park, and on the street! We offer a variety of Freestyle BMX Bikes for riders of all ages and ability levels, which are designed to withstand the punishment that takes place as you progress your BMX skills. Mongoose has always been an aggressive BMX brand with products that push the limits of what a rider can do.
With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L20 is a stylish freestyle BMX bike that offers everything a beginning rider needs to hit the streets and pop off curbs!
- Mongoose® Hi-Ten steel frame and fork; 8” handlebar
- 3-piece chromoly tubular crank; 8-spline spindle
- Aluminium single-wall 36H rims; 2.3” tires
Occasionally, without notice, manufacturers change product design and/or specifications.
|Frame:||Hi-Ten steel, BMX freestyle geometry|
|Headset:||Threadless, 1-1/8" external, retainer bearing|
|Stem:||Mongoose, threadless top load, 50 mm|
|Bars:||Mongoose, Hi-Ten steel, 28 in width, 8 in rise|
|Front Brake:||U-brake, aluminum|
|Rear Brake:||U-brake, aluminum|
|Rims:||Aluminum single wall, 24 mm ID, 36H|
|Front Hub:||Steel, ball bearing, 3/8 in axle, 36H|
|Rear Hub:||Steel, sealed-bearing cassette, 14 mm axle, 36H|
|Spokes:||14G, steel, black|
|Front Tyre:||20 in x 2.3 in, wire bead|
|Rear Tyre:||20 in x 2.3 in, wire bead|
|Seat Post:||Steel, 250 mm, 25.4 mm|
|Saddle:||Mongoose, steel rails|
|Chainset:||3-piece, tubular chromoly, 25T steel chainring|
|Bottom Bracket:||American loose ball, 8-spline spindle|
|Cassette:||Single-speed, 9T cassette driver|
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BMX Size Guide
BMX Size guide
Kids BMX Size Chart
Feet & Inches
3'7" - 4'0"
110cm - 122cm
5 - 7 years
4'0" - 4'10"
122cm - 147cm
7 - 11 years
4'10" - 6'4"
147cm - 193cm
Adult BMX Size chart
20” BMX bikes can be sized on top tube length. A taller rider will suit a longer top tube. Though some riders might wish to experiment with top tube length to suit different riding styles, below is a suggestion.
Top tube length
5’0” – 5’5” (152 – 165cm)
20” – 20.5”
5’5” – 5’10” (165 – 178cm)
5’10 – 6’0”+ (178 – 183cm+)
Cruiser BMX Sizing
BMX Bikes with wheels larger than 24” are known as cruisers and will suit riders taller than 5’0” 152cm.
Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!
How do I apply for finance?
Spend £99 or more at Tredz and you can spread the cost. Pay monthly over 6-48 months, interest free (dependent on repayment terms and amount).
1Fill your basket with everything you want from Tredz and go to the checkout.
2During checkout, select the finance option you want as your method of payment.
3You will be sent to our finance provider's secure server to complete your application.
4Finance providers PayPal & V12 will use the information provided to make a decision and complete checkout if you are approved.Read more about buying on finance
Buy now, pay 12 months later.
Interest free credit with no deposit. Pay nothing for 3 or 6 months on orders over £850, or 12 months on orders over £1,500* *Not available through PayPal Credit
Flexible finance options
Choose your deposit.
Choose your term.
Lowest monthly cost
for 6 months
Delivery & Guarantee
UK Delivery Information
We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.
Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.
Please note that Pre-Order dates can sometimes change due to updated stock information.
Click here for more UK and international delivery information.
Returns & Warranty
It's easy to return a product with our 365 day, hassle free returns.
We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).
Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.
If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.
For more information please visit our Returns & Warranty page.
What's In The Box
What's In The Box
As cyclists ourselves, we know you will be keen to get out on your new bike as soon as possible. That's why we provide you with all the essential kit you need to get your shiny new bike rolling for the first time.
Most bikes don't come with pedals as standard so we include a set of basic pedals, free of charge with every bike we send out. We will also provide you with a pedal spanner to fit them and a 9-key trail tool, along with full instructions for setting your bike up out of the box. Each bike is sent out with a 16 point, quality control check sheet so you can be confident that your bike has been fully checked by our qualified mechanics.
- Basic setup instructions
- 16 point quality control checklist
- Free tredz multitool
- Free tred pedal spanner
- Free basic pedals
- Free drawstring kit bag
- Free bike insurance voucher
All these items are provided at no extra charge and are packed into a Tredz drawstring bag that doubles up as a handy backpack for carrying your ride essentials.
- Basic bike setup instructions
- Free ‘basic’ pedals
- Free Tredz pedal spanner
- Free Tredz 9-key trail tool
- Free Tredz drawstring bag
- Free 8 weeks insurance voucher
- 16 point, quality control check sheet
Read our bike setup guide.
- Tredz bikes are fully checked & tested by Cytech qualified mechanics
- 0% APR finance available on any basket over £99
- Price match
- 365 day 'no hassle' returns
- Free UK delivery, on a date that suits you