Three Radio Raceline Helium 2027 Expert XL Frames—made from hydroformed 6061 alloy—overlap against a white background, showcasing the lightweight race frame in two blue and one black color options.
The Radio Raceline Helium 2027 Expert XL Frame, made from hydroformed 6061 alloy and featuring the "Radio" logo on the side, is shown against a white background.
The Radio Raceline Helium 2027 Expert XL Frame, a light purple, lightweight race frame with "RADIO" and "HELIUM" logos, is crafted from hydroformed 6061 alloy and shown side-on against a white background.
Radio Raceline Helium 2027 Expert XL BMX frame shown side-on, featuring brand and model labels on hydroformed 6061 alloy tubes for a lightweight race build.

Highlights

  • Hydroformed 6061 alloy tubing
  • 20.5" top tube, 20.7" rider area
  • SDDS sliding dropouts
  • Flat mount disc or V-brake

Description

The Radio Helium frame has been out on track now for several years, with each year seeing the brand steadily improving this frame. For 2027 the colours and graphics have definitely taken on a clean look, with solid colourways and bold Radio decals on the down tube.

Technically, the frame is manufactured from industry trusted hydroformed 6061 alloy tubing, which produces a super lightweight race frame that is strong enough to take on the big tracks and high speeds they produce. Even the youngest racers need a frame that can take on 5m hill and everything that follows on from it.

The Radio Helium frame has proved over the past 5 races seasons that they can not only produce race wins, they are built to a standard where you can trust it with touches like a forged (read strong) dropout that can integrate Radio's disc mount. Or if you're running V-brakes, then Radio has you covered here as well. You have the choice.

Speaking of the dropout, on the Expert XL Radio have utilised the Sliding Dropout Disc System (SDDS) for 10 or 15mm axles (please advise us of your axle preference) 

Features
  • Hydroformed 6061 alloy tubing. 1590g of light, strong race frame, built to hold speed on the big tracks.
  • 20.5" top tube, 20.7" rider area. Expert XL room for a rider who has outgrown a standard Expert, with 13.2" minimum chainstays behind them.
  • SDDS sliding dropouts. Take 10 or 15mm axles and include all the hardware, so you can set the rear end where you want it.
  • Flat mount disc or V-brake. V-brake mounts are removable at 77mm pivot to pivot, so take them off once you commit to disc.
  • Race angles, standard race fittings. 73.5° head angle, 71° seat angle, a BSA 68mm bottom bracket and a 1-1/8" integrated head tube.

Specifications
  • Top tube: 20.5" (521mm)
  • Chainstay: 13.2" (335mm) minimum
  • Head tube angle: 73.5°
  • Seat tube angle: 71°
  • Bottom bracket height: 10.8" (274mm)
  • Bottom bracket: BSA, 68mm wide
  • Tubing: Hydroformed 6061 alloy
  • Dropouts: Sliding dropout disc system (SDDS) for 10 and 15mm axles, includes all hardware
  • Brake mounts: Flat mount disc brake or removable V-brake mounts, 77mm pivot to pivot
  • Head tube: 4.72" (120mm), 1-1/8" for integrated headset
  • Seat tube: 8.42" (215mm), 22.2mm seat post
  • Seat clamp: For 25.4mm ID seat clamp
  • Axle: 10 or 15mm, please advise your preference
  • Wheel size: 20" x 1.4"
  • Weight: 1590g (1.59kg)
  • Note: Rider area 20.7" (526.6mm)

Radio Raceline Helium 2027 Expert XL Frame

Brand: Radio Raceline SKU:

$799.99 AUD

Or 4 payments of $199.99 AUD with

Colour - Gloss Black

Top Tube Length - 20.5

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

Radio Raceline Helium 2027 Expert XL Frame - Gloss Black / 20.5

$799.99 AUD

Price match request

$12.99 flat-rate shipping Australia-wide, Express from $21.99

Free in-store pickup - Brisbane

Availability

20.5
Metallic Ocean Blue
Galactic Ice Purple
Gloss Black

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

Building a bike around this frame?

Add it to your cart, then pick the rest in our bike builder. Complete the build for 10% off the parts and free assembly.

Open the bike builder

Need Help ?

Chat with the LUXBMX crew!

Email Us Call Us SMS Us
  • 100% Australian owned
  • Australia's largest BMX range
  • Hassle-free returns
  • Fast trackable shipping

Price match request

Seen it cheaper somewhere else? Send us the link and we'll take a look.