Supercross BMX | SX450 Bubba Harris Edition Cro-Mo BMX Race Frame
$ 499.95 - $ 589.95
37 Years of Supercross
Building BMX race frames since 1989 — 8× USA BMX Bike of the Year, 3× Team of the Year, Olympic riders from Tokyo to Paris. Read the full story →
- Overview
- The Story
- Geometry
The SX450, it started out as a Cromo BMX Race Frame that evolved from our UL series, and quickly became Bubba's go to bike, so why not give the 2023 Hall of Famer, 3 time ABA #1 Pro and UCI World Champ a signature bike of his own. He calls it his Fun Machine, his head to the skateparks, the trails, the track, it goes with him everywhere he goes, and after all, isn't that what your bike should do?
It is classic in the form that it built from Steel ( Air Hardened Triple Butted Cro-mo to be exact ), and it is Triple Show Chrome Plated, ( got to love Chrome right? ) and it has a Retro style inspired graphic. But that is where the Retro, or Tribute style ends. After that it is all modern, and probably, if not definitely the most advanced Cro-mo race frame available.
It starts out with a full CNC machined Campy integrated head tube, a Reynolds, double / triple butted air hardened Cro-mo tube set, a Butted and tapered seatmast , a CNC’d Euro BB shell, tapered and butted seat stays and chain stays, and back side CNC’d laser cut dropouts w/ 10mm slots welded on to the cut and capped stay ends.
And of course what would all of this Cro-mo goodness be with out a full race pedigree so we build it up in our world famous and World Championship winning, Supercross geometry of the all our Supercross BMX race frames.
Please note this is sold as frame only. The Matching Supercross SLT forks are available by clicking here.
Please join the Supercross BMX Riders Group on Facebook and show off your new SX450 - Post up pics of your build and share your serial # - we would love to create a registry for everyone to keep track of these limited edition builds.
SX450 features:
- Campy Integrated Headtube
- V Brake Mounts
- Threaded BB
- 3/8" Dropouts
- External Brake Routing
Available in 6 different sizes to fit all riders and 4 stock colors (Jet Black, Show Chrome Racing Red, and Bubba's Neon Green ) .
And don't forget about Bubba's Signature Saddle and Shirt.
The SX450, it started out as a Cromo BMX Race Frame that evolved from our UL series, and quickly became Bubba's go to bike, so why not give the 2023 Hall of Famer, 3 time ABA #1 Pro and UCI World Champ a signature bike of his own. He calls it his Fun Machine, his head to the skateparks, the trails, the track, it goes with him everywhere he goes, and after all, isn't that what your bike should do?
It is classic in the form that it built from Steel ( Air Hardened Triple Butted Cro-mo to be exact ), and it is Triple Show Chrome Plated, ( got to love Chrome right? ) and it has a Retro style inspired graphic. But that is where the Retro, or Tribute style ends. After that it is all modern, and probably, if not definitely the most advanced Cro-mo race frame available.
It starts out with a full CNC machined Campy integrated head tube, a Reynolds, double / triple butted air hardened Cro-mo tube set, a Butted and tapered seatmast , a CNC’d Euro BB shell, tapered and butted seat stays and chain stays, and back side CNC’d laser cut dropouts w/ 10mm slots welded on to the cut and capped stay ends.
And of course what would all of this Cro-mo goodness be with out a full race pedigree so we build it up in our world famous and World Championship winning, Supercross geometry of the all our Supercross BMX race frames.
Please note this is sold as frame only. The Matching Supercross SLT forks are available by clicking here.
Please join the Supercross BMX Riders Group on Facebook and show off your new SX450 - Post up pics of your build and share your serial # - we would love to create a registry for everyone to keep track of these limited edition builds.
SX450 features:
- Campy Integrated Headtube
- V Brake Mounts
- Threaded BB
- 3/8" Dropouts
- External Brake Routing
Available in 6 different sizes to fit all riders and 4 stock colors (Jet Black, Show Chrome Racing Red, and Bubba's Neon Green ) .
Please join the Supercross BMX Riders Group on Facebook and show off your new SX450 - Post up pics of your build and share your serial # - we would love to create a registry for everyone to keep track of these limited edition builds.
And don't forget about Bubba's Signature Saddle and Shirt.
| Size | A | B | C | D | E | Post Size | Fork | Wheel Size | Weight |
| Pro | 20.5" | 114.75" | 74.5º | 70º | 11.6" | 27.2mm | 1 1/8" | 20 x 1.75 | 4lbs 2.8oz |
| Pro XL | 21.25" | 15.2" | 74.5º | 70º | 11.6" | 27.2mm | 1 1/8" | 20 x 1.75 | 4lbs 4.8oz |
| Pro XXL | 21.75" | 15.2" | 74.5º | 70º | 11.6" | 27.2mm | 1 1/8" | 20 x 1.75 | 4lbs 5.8oz |
| Pro XXXL | 22.25" | 15.2" | 74.5º | 70º | 11.6" | 27.2mm | 1 1/8" | 20 x 1.75 | 4lbs 6oz |
All weights are measured on a UPS Calibrated Scale. Weights will vary depending upon the amount of powdercoat and the amount of filler rod used on a particular frame. Polished Frames and Anodized Frames are the lightest as there is no paint. Weights and Specifications are subject to change without notice.
Race calendar
Never miss a USABMX national
Add the 2026 USABMX national race schedule to your calendar with one click. Built by Supercross BMX so racers, parents, and fans can keep every national weekend in one place.
Dates are based on the official USABMX national schedule and may be updated if changes are announced. This calendar is a fan/racer convenience tool from Supercross BMX and is not an official USABMX calendar.
B
I have just begun to build up my new SX450 and it’s a work of art! All chromoly and light as can be, I can already tell this is going to be my favorite bike of my almost 50 years on two wheels. Bill is as nice as they come and you can tell he cares about the details and quality. I am looking forward to hitting the street soon and this will definitely not be my last purchase. There are so many great choices it's hard to decide!
L
I’m writing a second review after finishing the build on another race cruiser that’s nearly identical to the 20" bike from my previous review.
As mentioned before, chrome parts have been very difficult to source in 2026. Bill Ryan noted that chroming in the United States is nearly impossible right now. I don’t see that as a shortcoming of Supercross, but rather a reflection of the current state of the metal fabrication industry.
Despite the chrome supply issues, I was still able to put together a slick cruiser just in time for the 2026 Carolina Nationals at Rock Hill BMX in South Carolina. The bike rode exceptionally well, and it’s always fun lining up on the gate next to tricked-out carbon bikes with disc brakes, internal brake routing, and all the latest features—and still being able to hang with them.
L
I absolutely love what this frame stands for. The geometry, looks, and finish are all great.
My only remarks are that I wish Supercross could keep more chrome products in stock. I have inquired about chrome forks and bars many times all to no avail. The demand for chrome might be returning as so many people have mentioned they want a chrome build but finding the parts is tough in 2026.
But overall, I wouldn't change a thing. I love the frame and the entire build itself and I couldn't begin to tell you how many compliments my bike gets whenever I take it to the bigger races.
R
Awesome frame, the racing red looks freaking great! Very high quality! Shipped fast. Very satisfied! I’m very glad I picked this frame over other companies frames. Supercross Rules 😎🤙
T
Supercross BMX | SX450 Bubba Harris Edition Cro-Mo BMX Race Frame
J
Great geo and beautiful construction. Love the threaded BB. I am very happy with this frame.
D
Awesome chromoly cruiser frame and the Chrome finish is top notch as well. So good to be back on a steel frame.