Supercross BMX | SX250 - 33 Year Radaversary BMX Chassis

SHIPPING AUGUST 2022! now taking deposits to hold your place in line. 

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, and had to solve the problem of frame flex and stiffness, so the extra triangulation is what we did. By lowering the first set of seat stays and adding the second set of stays for additional triangulation, we had a BMX race frame that was stiffer, faster accelerating and better handling that the other ones on the market.

Since we discontinued the use of the 6 bar rear end and the secondary seat stays, we have always been asked to make a re-issue. In 2019, for our 30 year anniversary, we did a limited run of the 6 Bar SX250's , not an old school wall hanger, but an actual modern race frame, but we got TANGE back on board to build us a few more of the Prestige® Tubesets and have built them into the ultimate Retro Race bike. Only 30 pcs of Each size, Since then we have had a ton of people as us to do it again, and they have wanted the 29" as a frame set, well for our 33 year Radaversary, we are bringing you something similar.

The SX250 6 Bar Chassis Kit - A Reynolds Cro-mo version of our original 6 Bar frame and in a size we haven't done before. 26" Pro! Also available again in a 24" Pro XL Cruiser.

The Triple Butted Reynolds Tubing, the Flared Seatmast, the Heat Treated Cro-mo Dropouts that are CNC'd with the Supercross Logo and also weight releaved on the back side.  The Serial Numbers on these are 25033 "6" for 26" and then 1-50 for the 50 Limited Edition Frames in the 26" Size, and "4" for the 24" and 1-50 for the 50 Limited Edition Frames in the 24" Size.

The Chassis Kit is the Supercross BMX SX 250 Reynolds® Butted Cold Drawn Cro-moly Steel. A Heat Treated 4130 Seamless Cro-mo Supercross Pro Fork with Welded in Star Nut,  and a Speedline Sealed bearing Campy Style Integrated Headset.

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