Glossy black Speedco M2 Junior Cruiser aluminium frame shown from a side angle, isolated on a white background.
The Speedco 2024 M2 Junior Cruiser Frame features a sleek black design with two parallel bars and attachment points for a seat, handlebar, and wheels. Constructed from durable 7005 series aluminium, it also supports disc brakes for enhanced stopping power.
Matte black Speedco M2 Junior Cruiser Frame with gold accents, pictured from a rear side angle against a white background.
Matte black and gold Speedco M2 Junior Cruiser Frame pictured on a white background, featuring the brand name on the lower tube—one of Speedco’s top youth aluminum frames.
Matte black and blue Speedco M2 Junior Cruiser Frame displayed on a white background, showcasing its side and rear triangle design. Ideal for riders looking for a premium aluminium frame in the youth cruiser category.
The Speedco M2 Junior Cruiser Frame, shown in black and blue with light blue accents and made from lightweight aluminum, is displayed side-on against a white background—highlighting its high-quality design for youth riders.

Highlights

  • Junior Cruiser, 18.75" top tube
  • Double butted 7005 aluminium
  • Rim brake now, disc later
  • Euro bottom bracket

Description

New colours for the Speedco M2 Alloy Youth frames bring a fresh update and confirm that the V-brake is not quite dead, yet! The Speedco M2 youth series retains the brake post mounts on the seat stay, though you have the option to run disc brakes using the M2 adapter.

Reliable 7005 series aluminium is used to manufacture the Speedco youth series of frames, tubing that is heat treated and double butted for weight reduction and increased strength. The down tube is tapered and wider at the bottom bracket to provide increased stiffness in this critical area. Bottom line, these are super light aluminium frames.

Additional features of the M2 frames include a seamless integrated chain tensioner system and internal cable routing from front of top-tube to mid seat-stay exiting right at the brake caliper, keeping the hydraulic hose protected as possible.

If you are making the jump to your first disc brake frame? Contact LUX's customer service team and they will step you through the process to ensure that everything goes together smoothly. They can help you choose the right wheelset and disc brake set up for your new Speedco race rig.

Features
  • Junior Cruiser, 18.75" top tube. One of six youth sizes in the M2 range, running from a 17" Mini up to a 20" Expert Cruiser.
  • Double butted 7005 aluminium. Heat treated tubing keeps these youth frames light, with a tapered down tube that widens at the bottom bracket for stiffness.
  • Rim brake now, disc later. The seat stay keeps its brake posts, and you can move across to disc when you are ready using the Speedco M2 adapter.
  • Euro bottom bracket. A standard Euro shell keeps bottom bracket and crank choices simple when it comes time to replace them.
  • Internal routing, integrated tensioner. The hose runs inside from the front of the top tube out at the calliper, and chain tension is built into the frame.

Specifications
  • Sizes: Mini 17", Junior 18", Expert 19.25", Expert XL 20", Junior Cruiser 18.75", Expert Cruiser 20" top tube
  • Top tube: 18.75"
  • Bottom bracket: Euro
  • Material: 7005 series aluminium, heat treated
  • Tubing: Tapered down tube, wider at the bottom bracket
  • Butting: Double butted
  • Dropouts: Seamless integrated chain tensioner system
  • Brake mounts: Seat stay brake posts, disc option with the M2 adapter
  • Cable routing: Internal, front of top tube to mid seat stay, exiting at the calliper
  • Head tube: 1-1/8"
  • Seat tube: 22.2mm seat post

Speedco M2 Junior Cruiser Frame

Brand: Speedco SKU:

From

$799.99 AUD

 $1,099.99 AUD

Or 4 payments of $199.99 AUD with

Colour - Matte Blue

Top Tube Length - 18.75

BMX race bike sizing

Race frames are sized by class, and the class you ride is set by rider height rather than age.

SizeRider heightTop tube
Micro (18" wheels)Under 110cm16.25"
Mini (20" wheels)110 to 125cm17 to 18"
Junior120 to 140cm18.25 to 18.75"
Expert135 to 155cm19.5 to 19.75"
Expert XL150 to 165cm20 to 20.75"
Pro160 to 170cm20.25 to 20.75"
Pro XL165 to 175cm21 to 21.25"
Pro XXL170 to 185cm and up21.5 to 21.85"
Pro XXXL175 to 185cm and up22"
Pro XXXXL185cm and up22.5"
Cruiser (24" wheels)175cm and up21.5" and up

Heights overlap between bike sizes on purpose. If you fall in two size categories, a growing rider new to racing is usually better suited to the larger bike, a experienced rider who wants the bike to more responsive should err on the smaller size. Some brands label the Pro size Pro L, with the same fit.

How to measure

Stand your rider against a wall in the shoes they ride in, heels flat, and mark the top of their head. Measure from the floor to the mark. Just don't guess their height either, you know how fast they can grow!

Here are some tips

  • Between two sizes and still growing? Take the larger size, but make sure you check the top tube length of the bike. The length of top tube for a given size (Expert XL as an example) can vary up to a half inch or more across brands. Most Expert XL frames are 20", but we've seen them as long as 20.7"
  • Experienced racer and wanting the bike to be more responsive? Take the smaller size. You want the bike to be "under you", not a stretch to the bars and cranks.
  • Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

Still not sure? We're the experts and size bikes for riders every day of the week. Our team has decades of experience between them and will help you decide which bike is the right fit based on rider height and racing experience.

Read the full buying guide

BMX race bike sizing

Race frames are sized by class, and the class you ride is set by rider height rather than age.

SizeRider heightTop tube
Micro (18" wheels)Under 110cm16.25"
Mini (20" wheels)110 to 125cm17 to 18"
Junior120 to 140cm18.25 to 18.75"
Expert135 to 155cm19.5 to 19.75"
Expert XL150 to 165cm20 to 20.75"
Pro160 to 170cm20.25 to 20.75"
Pro XL165 to 175cm21 to 21.25"
Pro XXL170 to 185cm and up21.5 to 21.85"
Pro XXXL175 to 185cm and up22"
Pro XXXXL185cm and up22.5"
Cruiser (24" wheels)175cm and up21.5" and up

Heights overlap between bike sizes on purpose. If you fall in two size categories, a growing rider new to racing is usually better suited to the larger bike, a experienced rider who wants the bike to more responsive should err on the smaller size. Some brands label the Pro size Pro L, with the same fit.

How to measure

Stand your rider against a wall in the shoes they ride in, heels flat, and mark the top of their head. Measure from the floor to the mark. Just don't guess their height either, you know how fast they can grow!

Here are some tips

  • Between two sizes and still growing? Take the larger size, but make sure you check the top tube length of the bike. The length of top tube for a given size (Expert XL as an example) can vary up to a half inch or more across brands. Most Expert XL frames are 20", but we've seen them as long as 20.7"
  • Experienced racer and wanting the bike to be more responsive? Take the smaller size. You want the bike to be "under you", not a stretch to the bars and cranks.
  • Top tube is the number that actually changes the fit, so compare it against the bike they ride now.

Still not sure? We're the experts and size bikes for riders every day of the week. Our team has decades of experience between them and will help you decide which bike is the right fit based on rider height and racing experience.

Read the full buying guide

Speedco M2 Junior Cruiser Frame - Matte Blue / 18.75

Discount 27%

Instead of $1,099.99

$799.99 AUD

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Availability

18.75
Matte Blue
Matte Gold
Stealth Black

● In stock at LUXBMX ● With supplier ● Preorder ○ Sold out

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