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Supercross BMX | AMX250 - Cadre de course BMX anniversaire 35 ans - The Six Bar

Mirror Polished ETA 3 Weeks Til Shipped

  • Overview
  • Specs
  • Geometry

Back in 1989 when we started Supercross BMX, the original frame was our 6 bar design. We used this design for over a decade on our Cro-mo and Aluminum BMX race Frames. 

When we designed the SX250, we were limited on tube sizes that the Steel Mills were running. We had to solve the problem of frame flex and stiffness, so the extra triangulation was our solution. By lowering the first set of seat stays and adding the second set of stays, we had a frame that was stiffer, faster accelerating, and better handling than the others.

We eventually turned the SX250 into the AMX250, the Aluminum Motocross!! And for our 35 year anniversary, we are bringing them back in Limited Editions and Limited Sizes for the BMXers in all of us that love the historic BMX racing. 


All frames will have the 35 Years Behind Bars Retro decals.

And don't forget your Supercross BMX Retro Pads, or the Supercross BMX Retro Stem to complete the build. Who could forget the fork?

Please post pics of your builds and share your serial # on the Supercross BMX Riders Group on Facebook!

Full 6061 T-6 Aluminum for the historic Aluminum ride and feel, they then go through a double heat treat process from T-4 to T-6 with a final alignment process to ensure a strong and straight frame . The Extra Stiffness, the weight reduction, the speed, the style. the BMX!

Full Heat Treated post-weld construction, 

Campy® Style Integrated Headtube, 

CNC Machined 68mm Euro BB shell, 

27.2 Seat post 

31.9 Seat post Clamp  ( 20" has built in Clamp )  and the famous 6 bar rear end.

20" are V Brake Only 
26" are V Brake Only
29" are Disc Brake Only

Colors are Polished Aluminum , Matte Teal Blue Blue, Matte Red, 90's Yellow or Gloss Black.

Available sizes are Pro XXL 20" ( 21.75" TT ) , Pro 26" ( 22.75" TT ) and Pro 29"  ( 23.75" TT ) 

Only 35pcs of the Pro XXL 20" and very limited numbers of the 26" and 29" cruisers.  And from your serial number, you can tell what number yours is.


As an example: For the Pro XL's it will show the following serial numbers - 250XL001 , 250XL002, 250XL003 etc, and will be on the Left Rear Dropout as the Original Supercross BMX Racing Frames were.

Supercross BMX AMX250 20" Pro XXL - 
TT- 21.75"
CS - 15.25"
HAº - 74.5º
BB Height- 11.625"
V Brake Only

Supercross BMX AMX250 26" Pro - 

TT- 22.75"
CS - 15.7"
HAº - 71.5º
BB Height- 11.625"

V Brake Only

Supercross BMX AMX250 29" Pro - 

TT- 23.75"
CS - 17.7"
HAº - 71.5º
BB Height-  11.625"

Disc Brake Only

This is a FRAME only - You will need to purchase you fork, headset, and all other parts separately.

This frame accepts a 27.2 Post with a 31.9 seat clamp. 

The 20" 35 Year anniversary AMX250 has a built in Seatpost Clamp - so no Clamp is required.

Visit our Big Bike / Retro section to complete your bike!

It takes traditional 3/8" BMX axles. 110mm spacing rear and 100mm spacing front.

Check the "Specs" tab on the top right for the full lowdown!

We don't sell Factory Jerseys, but we do have "Radaversary" Jerseys with all kinds of other cool merch and gear on our Lifestyle page! Check it out, you will like what you see!

Customer Reviews

Based on 8 reviews

I love it

Brian Jones
Supercross 29

UPS damaged my frame and fork but bill was fast to have it replaced A+
I can't wait to build this thing!!!! Pic is of my 26 I ordered also

Rodney Odling
Great frame

Did not receive hardware for seat and brake cable frame guid monts

Tony Flores
Yellow Mellow

Very pleased to have acquired a frame. I'll have to fork soon.

Ralph Villa

Supercross BMX | AMX250 - 35 Year Anniversary BMX Race Frame - The Six Bar