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Mongoose Legion L100 - Bike 2019 BMX BMX Bike

This bike is currently unavailable due to increased demand

The best way to guarantee the new 2021 model is by pre-ordering today.

To pre-order this bike today, click the deposit payment button and then select your size.




About the productMongoose Legion L100 - BMX Bike 2019 silver

Ranging from the LXS to the L100, the Legion series of bikes offers everything a BMX rider could need from your first true BMX bike in the L18 to a fully park, street and dirt worthy machine in the L100. Mongoose® has infused over 40 years of experience along with feedback and insights from our pro riders to develop the best line of Legion bikes yet.

I was nervous of buying on the web but DH made it an easy process.


FRAME4130 chromoly, BMX freestyle geometry, removable brake mounts, integrated headset, mid BB shell
FORK4130 chromoly, 1-1/8 threadless steerer, tapered legs
HEADSETthreadless sealed integrated 1-1/8
HANDLEBARMongoose, 4130 chromoly, 8.75
H STEMMongoose, top load, 50 mm ext.
SEATMongoose Pivotal
SEATPOSTsteel, 25.4 mm, pivotal
HUB FRONTAlloy, 3/8 female axle with bolt; 36H
HUB REAR36H, 9T Cassette, 14 mm axle, sealed bearing, AL shell
RIMSaluminum, double wall, 36H
GRIPSMongoose MushXL, 160 mm
STEMMongoose, top load, 50 mm ext.
BOTTOM BRACKETMid sealed bearing, 8-spline spindle
REAR BRAKEaluminum U-brake
FRONT BRAKEaluminum U-brake
TYRES20 x 2.4
AVAILABILITY Please call for availability

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Size guide

Bmx sizing chart
Feet and Inches Centimetres Age (years) Inches
3' 7" - 5' 3" 110 - 122 5 - 7 16
4' 0" - 4 10" 122 - 147 7 - 11 18
4' 10" - 6' 4" 147 - 193 11+ 20
Mongoose Legion L100 - BMX Bike 2019
Mongoose Legion L100 - BMX Bike 2019

Shipping & returns

Shipping is free within England, Wales and parts of Scotland. Due to the size and weight of most bikes however, a charge would apply to shipping remote regions, offshore UK and Ireland.

The courier will require a signature for your delivery. If no one is available to sign for your goods, the courier will leave a card with instruction of where you can collect it.

Working days are Monday to Friday. However, there may be circumstances beyond our control which cause delay and in such circumstances we will endeavour to deliver the goods within 7 days of the date the order was made.


Our flexible finance options mean you can purchase this product with a minimal deposit (or call us and arrange a deposit that suits you). Before applying for finance, please ensure you have read the information on eligability.

Apply for finance online through v12Finance

Pre-order deposit

The quickest way to secure your 2021 model Legion L100 - BMX Bike


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