20" Mongoose Legion L40 (2025)
20" Mongoose Legion L40 (2025) - Navy : This product is available for backorder only. Will ship as soon as it is back in stock.
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Sizing Chart
Sizing Chart
Sizing
BMX Bikes
This sizing chart to be used as a reference only. Minor variances may exist between manufacturers. The best way to determine your size is to visit us in-store and get fitted.
| Wheel Size | Top Tube Length | Rider Height (cm) | Rider Height (in) |
|---|---|---|---|
| 12" | 12-12.5" | 60-91cm | 2'0"-3'0" |
| 14" | 14-14.5" | 81-106cm | 2'8"-3'6" |
| 16" | 16-16.5" | 96-122cm | 3'2"-4'0" |
| 18" | 18-18.5" | 122-147cm | 4'0"-4'10" |
| 20" | 19.75-20.25" | 147-157cm | 4'10"-5'3" |
| 20" | 20-20.5" | 157-168cm | 5'3"-5'6" |
| 20" | 20.25-20.75" | 168-175cm | 5'6"-5'9" |
| 20" | 20.5-21" | 175-183cm | 5'9"-6'0" |
| 20" | 20.75-21.5" | 183-190cm+ | 6'0-6'3" |
Shipping Information
Shipping Information
This product: Pickup in-store only. Shipping not available.
Shipping available†
We offer shipping on select brands including: Rocky Mountain, Orbea, XDS, Icon, Jamis, Shogun, Schwinn, BYK, Kidvelo. These bikes are shipped unbuilt in their original box.
†Only bikes stocked at our Warehouse location are available for shipping.
Shipping upon request to your local bike shop
Some brands require the bike is delivered directly to a bicycle shop or mechanic for assembly, and shipping is not available to your residence. These include GT, Cannondale, .
Request a shipping quote to proceed.
Pickup in-store only
Certain bike brands cannot be shipped and are only available for Click and Collect or purchase in-store.
These include but are not limited to the following brands: Giant, Norco, Liv, Momentum, Malvern Star and Mongoose.
Pre-assembled bikes
†Any bikes in stock at our Heidelberg Heights, Hallam or Hoppers Crossing store locations are already fully assembled, and therefore only available for Click and Collect or purchase in-store.
Sizing
BMX Bikes
This sizing chart to be used as a reference only. Minor variances may exist between manufacturers. The best way to determine your size is to visit us in-store and get fitted.
| Wheel Size | Top Tube Length | Rider Height (cm) | Rider Height (in) |
|---|---|---|---|
| 12" | 12-12.5" | 60-91cm | 2'0"-3'0" |
| 14" | 14-14.5" | 81-106cm | 2'8"-3'6" |
| 16" | 16-16.5" | 96-122cm | 3'2"-4'0" |
| 18" | 18-18.5" | 122-147cm | 4'0"-4'10" |
| 20" | 19.75-20.25" | 147-157cm | 4'10"-5'3" |
| 20" | 20-20.5" | 157-168cm | 5'3"-5'6" |
| 20" | 20.25-20.75" | 168-175cm | 5'6"-5'9" |
| 20" | 20.5-21" | 175-183cm | 5'9"-6'0" |
| 20" | 20.75-21.5" | 183-190cm+ | 6'0-6'3" |
20" Mongoose Legion L40 (2025)
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!
HIGHLIGHTS
- Hi-Ten steel frame, removable brake mounts, and mid BB shell.
- 175mm 3-piece tubular chromoly hollow spindle cranks with a 25T steel chainring and mid sealed bearing bottom bracket.
- 20” x 2.3” tires mounted on aluminum single wall 36H rims with 3/8” female axle front hub and 9T cog sealed bearing cassette rear hub.
- Hi-Ten steel handlebar and fork, 50mm stem, threadless sealed integrated headset, and Aluminum U-brake.
- 20.5-inch top tube length. Suggested rider height is 5’0” – 5’6”.
SPECIFICATIONS
| Frame | Hi-Ten steel, BMX freestyle geometry, mid BB shell |
| Fork | 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, 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 |
| Tires | 20 in x 2.3 in, wire bead |
| Pedals | Mongoose, nylon |
| Brakes | U-brake, aluminum |
| Handlebar | Mongoose, Hi-Ten steel, 28 in width, 8 in rise |
| Stem | Mongoose, threadless top load, 50 mm |
| Headset | Threadless, integrated 1-1/8”, retainer bearing |
| Seat Post | Steel, 250 mm, 25.4 mm |
| Saddle | Mongoose Unifier, 1 piece rails |
| Grips | Mongoose MushXL, 160 mm |
| Sizes | One size |
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Pedals
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Notes
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Speeds (rear)Single Speed
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Age GroupTeenagers, Kids, Adults
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GenderGirls, Boys, Womens, Mens, Unisex
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DisciplineBMX
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SKUsNavy: M41563U10OS, Tan: M41563U20OS
