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Supercross BMX | SX250 - Châssis BMX Radaversary 33 ans

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

During the SX250's design process, the Steel Mills were limited on tube sizes. So to solve the issue of frame flex, we added additional triangulation. By lowering the first set of seat stays and adding the second set of stays, we increased rear-end rigidity. This produced a stiffer, faster-accelerating frame, that still rode smoother than other options on the market.

Since we discontinued the 6-bar rear end, we always get asked about doing a re-issue. In 2019, for our 30-year anniversary, we did a limited run of 6-Bar SX250's . But this was no old-school wall hanger. Rather an actual modern race frame with a retro aesthetic. We brought TANGE back on board to build a few more Prestige® Tubesets for the ultimate Retro Race bike. There were only 30 pcs of each size!

Since then, we've had a ton of people ask us to do it again. But this time, they wanted the 29" frame set.

Introducing the SX250 6 Bar Chassis Kit - A Reynolds Cro-mo version of our original 6 Bar frame in a 26" Pro! We're also bringing back the popular 24" Pro XL Cruiser.

Each chassis contains:

  • Supercross BMX SX250 Frame Reynolds® made of Butted Cold Drawn Cro-moly Steel

  • Heat Treated 4130 Seamless Cro-mo Supercross Pro Fork with Welded in Star Nut

  • Speedline Sealed bearing Campy Style Integrated Headset.


Want to watch a more in depth video on the tech behind the SX250? Click Here

You'll be getting all the goodies:

- Triple Butted Reynolds Tubing made of Butted Cold Drawn Cro-moly Steel

- Heat Treated 4130 Seamless Cro-mo Supercross Pro Fork with Welded in Star Nut

- Flared Seatmast

- Heat Treated Cro-mo Dropouts (CNC'd with the Supercross Logo and also weight 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.

"4" for the 24" and 1-50 for the 50 Limited Edition Frames in the 24" Size.

26" Frame Specs

24" Frame Specs

Il s'agit d'un kit de châssis complet similaire à la façon dont le VISION F1 est vendu.

L'achat comprend

  • cadre
  • fourchette
  • casque pour un châssis complet pouvant servir de base pour une construction neuve ou ancienne !

Ce cadre accepte un poteau de 27,2 avec un collier de selle de 28,6.

Visitez notre section Big Bike / Rétro pour compléter votre vélo !

Il utilise des axes BMX traditionnels de 3/8". Espacement de 110 mm à l'arrière et espacement de 100 mm à l'avant.

Consultez l'onglet « Spécifications » en haut à droite pour connaître toutes les informations !

Nous ne vendons pas de maillots d'usine, mais nous avons des maillots « Radversary » avec toutes sortes d'autres produits et équipements sympas sur notre page Lifestyle ! Regardez-le, vous aimerez ce que vous voyez !

Customer Reviews

Based on 2 reviews
Best of the Best

Bill and the SuperCross crew always the best to work with. God Speed

Anthony Coveris
Nice and clean

Closest frame and forks to the ones in the 80’s! Welding looks great! Awesome!!