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At Ivanhoe Cycles, we have one of the largest range of Mongoose BMX bikes in Australia. From the base level Legion L10 to the high-end Legion L100. And we actually have them in stock too.

Every Mongoose BMX is labelled the “Legion”. It’s the number after the word that matters. The higher the number, the better the model.

Also, all Mongoose Legion BMXs will have the wheel size (20-inch diameter) unless it’s the Legion L16 or Legion L18 (which have 16-inch and 18-inch diameter wheels, respectively).

But it’s the top-tube length that changes. This determines the “size” of the BMX, not the wheel size.

We’ve given a brief preview of each model below (keep scrolling down).

20" Mongoose Legion L10 - Black
$349.00 $399.00
Instore or Click & Collect
20" Mongoose Legion L10 - Black
  • Intended use: Freestyle BMX
  • Experience level: Beginner
  • Hi-tensile steel frame and fork, 20-inch top tube
  • Chromoly 3-piece cranks
  • 25T/9T Gearing
  • Loose ball bearing bottom bracket
$349.00 $399.00
Instore or Click & Collect
20" Mongoose Legion L100 - Green
$599.00 $699.00
Instore or Click & Collect
20" Mongoose Legion L100 - Green
  • Intended use: Freestyle BMX
  • Experience level: Intermediate, Advanced
  • 4130 Chromoly frame and fork
  • Chromoly 2-piece cranks
  • 25T/9T Gearing
  • MID Sealed Bearing Bottom Bracket
  • 20x2.40” Tyres on Double Wall Alloy Rims
  • Sold fully assembled
$599.00 $699.00
Instore or Click & Collect
20" Mongoose Legion L100 - Grey
$599.00 $699.00
Instore or Click & Collect
20" Mongoose Legion L100 - Grey
  • Intended use: Freestyle BMX
  • Experience level: Intermediate, Advanced
  • 4130 Chromoly frame and fork
  • Chromoly 2-piece cranks
  • 25T/9T Gearing
  • MID Sealed Bearing Bottom Bracket
  • 20x2.40” Tyres on Double Wall Alloy Rims
  • Sold fully assembled
$599.00 $699.00
Instore or Click & Collect
20" Mongoose Legion L80 - Blue
$529.00 $649.00
Instore or Click & Collect
20" Mongoose Legion L80 - Blue
  • Intended use: Freestyle BMX
  • Experience level: Intermediate Suggested rider height: 165-180cm
  • 4130 Chromoly frame front triangle, Hi-tensile steel rear triangle, fork, and bars
  • Chromoly 3-piece cranks
  • 25T/9T Gearing
  • Mid Sealed Bearing Bottom Bracket, Sealed Bearing rear hubs
  • 20x2.30” Tyres on alloy rims
  • Sold fully assembled
$529.00 $649.00
Instore or Click & Collect
20" Mongoose Legion L20 - Green
$419.00 $469.00
Instore or Click & Collect
20" Mongoose Legion L20 - Green
  • Intended use: Freestyle BMX
  • Experience level: Beginner
  • Hi-tensile steel frame, fork and bars, 20.25-inch Top Tube
  • Chromoly 3-piece cranks
  • 25T/9T Gearing
  • Loose Ball Bearing Bottom Bracket
  • 20x2.30” Tyres
  • Sold fully assembled
$419.00 $469.00
Instore or Click & Collect
Mongoose Legion L40 BMX - Black
$399.00 $529.00
Instore or Click & Collect
Mongoose Legion L40 BMX - Black
  • Intended use: Freestyle BMX
  • Experience level: Beginner, intermediate Suggested rider height: 152-168cm
  • Hi-tensile steel frame, fork and bars, 20.25-inch Top Tube
  • Chromoly 3-piece cranks
  • 25T/9T Gearing
  • Mid Sealed Bearing Bottom Bracket
  • 20x2.30” Tyres on alloy rims
  • Sold fully assembled
$399.00 $529.00
Instore or Click & Collect
Mongoose Legion L40 BMX - Purple
$399.00 $529.00
Instore or Click & Collect
Mongoose Legion L40 BMX - Purple
  • Intended use: Freestyle BMX
  • Experience level: Beginner, intermediate Suggested rider height: 152-168cm
  • Hi-tensile steel frame, fork and bars, 20.25-inch Top Tube
  • Chromoly 3-piece cranks
  • 25T/9T Gearing
  • Mid Sealed Bearing Bottom Bracket
  • 20x2.30” Tyres on alloy rims
  • Sold fully assembled
$399.00 $529.00
Instore or Click & Collect
20" Mongoose Legion L20 - White
$419.00 $469.00
Instore or Click & Collect
20" Mongoose Legion L20 - White
  • Intended use: Freestyle BMX
  • Experience level: Beginner
  • Hi-tensile steel frame, fork and bars, 20.25-inch Top Tube
  • Chromoly 3-piece cranks
  • 25T/9T Gearing
  • Loose Ball Bearing Bottom Bracket
  • 20x2.30” Tyres on alloy rims
  • Sold fully assembled
$419.00 $469.00
Instore or Click & Collect
20" Mongoose Legion LXS - Black/Red
$349.00 $389.00
Instore or Click & Collect
20" Mongoose Legion LXS - Black/Red
  • Intended use: Freestyle BMX
  • Experience level: Beginner
  • Hi-tensile steel frame, fork, and bars, 18.20-inch Top Tube
  • 1-piece forged steel cranks
  • 36T/16T Gearing
  • Loose ball bearing bottom bracket and hubs
  • 20x2.00” Tyres on alloy rims
  • Sold fully assembled
$349.00 $389.00
Instore or Click & Collect
Mongoose California Special BMX - Blue
$649.00
Instore or Click & Collect
$649.00
Instore or Click & Collect

Mongoose’s BMX range starts off at the Legion L10. It’s perfect for beginner riders. It’s made from hi-tensile steel with 1 piece cranks. Its top-tube length is 20-inches long which makes it perfect for riders above approximately 155cm.

Next is the Legion L20. This has a top tube length of 20.25-inches. For the extra dollars, you get stronger 3-piece cranks. The maximum rider height is 5’3” for this size.

The Legion L40 uses a 20.5-inch top tube, ideal for riders around 5’6”.

Mongoose’s Legion L60 is a nice sweet spot build. It’s the same size as the L40 at 20.5-inches but the handlebars are bigger (1” wider and 0.75” taller). It also has an integrated head tube which means a stronger frame. The rims are also wider, which not only makes them stronger but also less prone to pinch flats on hard landings.

The Legion L80 is designed for taller riders because it uses a 20.75-inch top tube which will suit riders from around 5’8” tall. It’s the first BMX in the range to use a 4130 Chromoly steel front triangle.

This means the L80 is better at absorbing impacts and shocks, more resistant to corrosion than steel and lighter than steel.

Lighter aluminium hubs also means a lighter overall BMX too.

And lastly, we have the Legion L100. It’s the second-best BMX in Mongoose’s range. The L100 uses a complete 4130 Chromoly frame (not just the front half like the legion L100).

And it’s not just the frame; the L100’s fork is also made from 4130 Chromoly.

At 21-inches long, the frame is ideally designed for riders from 5’11” and upwards. Double wall rims at 30mm wide are designed for high impacts. And the tapered head tube gives the L100 incredible strength.