Product details

€ 479,00
€ 432,00

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With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L40 is a fully park, street or dirt worthy freestyle BMX bike that offers everything a new rider could need to bust their first tricks on their local ramp!

For almost 40 years, Mongoose has been in the dirt, on the trails and off the ramps. Founded in 1974 in a Southern California garage, Mongoose has always been an aggressive brand with products that push the limits of what a rider can do. From the biggest hits on the mountain or in the park to the urban jungle, Mongoose is an authentic brand that produces durable products built for real riders.

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.


Main Features

  • Mongoose Hi-Ten steel frame and fork.
  • BMX freestyle geometry
  • 8” handlebar.
  • 3-piece chromoly tubular crank.
  • 8-spline spindle.
  • Aluminum single wall 36H rims.
  • 2.3” tires for added stability and grip.
  • Clean and reliable 9 teeth cassette driver.
  • Plastic lightweight grippy pedals.
Frame Hi-Ten steel, BMX freestyle geometry, mid BB shell
Fork  Hi-Ten steel, 20”, Hi-Ten steel
Crank 3-piece, tubular chromoly, 25T steel chainring
Chain KMC S1
Bottom Bracket Mid sealed bearing, 8-spline spindle
Rear Cog
Single-speed, 9T cassette driver
Rims Aluminum single wall, 24mm ID, 36H
Front Hub Steel, ball bearing, 3/8" axle, 36H
Rear Hub Steel, sealed-bearing cassette, 14mm axle, 36H
Spokes 14G, steel, black
Tires 20" x 2.3", wire bead
Pedals Mongoose, nylon
Brakes U-brake, aluminum
Handlebars Mongoose, Hi-Ten steel, 28" width, 8" rise
Stem Mongoose, threadless top load, 50mm
Headset Threadless, integrated 1-1/8”, retainer bearing
Seat Post Steel, 250mm, 25.4mm
Saddle Mongoose Unifier
Grips Mongoose MushXL, 160mm

mongoose legion geometry

Legion L500L100L80L60L40L20L10L18L16LXS
Head Tube Angle (A) 75° 75° 75° 74.5° 74.5° 74° 74° 75° 75° 72°
Seat Tube Angle (B) 71° 71° 71° 71° 71° 71° 71° 71° 71° 71°
Horizontal Top Tube Length (C) 534mm 534mm 527mm 521mm 521mm 515mm 508mm 427mm 388mm 462mm
Seat Tube Length (D) 223mm 223mm 223mm 223mm 223mm 223mm 223mm 203mm 187mm 205mm
Standover Height (E) 565mm 565mm 565mm 565mm 565mm 565mm 555mm 515mm 465mm 520mm
Head Tube Length (F) 120mm 120mm 120mm 100mm 100mm 100mm 100mm 100mm 100mm 100mm
Chainstay Length (G) 348mm 348mm 348mm 348mm 348mm 348mm 348mm 335mm 305mm 366mm
Fork Offset (H) 35mm 35mm 35mm 35mm 35mm 35mm 35mm 37mm 35mm 35mm
Bottom Bracket Drop (I) 40mm 40mm 40mm 40mm 40mm 40mm 40mm 40mm 40mm 34mm
Wheelbase (J) 925mm 925mm 922mm 920mm 920mm 916mm 911mm 811mm 742mm 891mm
Stem Length 50mm 50mm 50mm 48mm 48mm 48mm 48mm 40mm 40mm 36mm
Bar Width 733mm 700mm 745mm 733mm 733mm 700mm 700mm 660mm 660mm 660mm
Seat Post  Size 25.4mm 25.4mm 25.4mm 25.4mm 25.4mm 25.4mm 25.4mm 25.4mm 25.4mm 25.4mm

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