Spotted overnight on Ratio Technology’s Instagram, it seems they are developing a prototype Direct-Mount rear derailleur kit to work with SRAM’s latest UDH dropout/hanger standard.
rumored to be dropping any day now… perhaps Ratio could even beat the big drivetrain maker to market with a similar, but profoundly more affordable upgrade option…which would have been limited to a max 42T cog.upgrades the old mountain bike derailleur to 12-speeds and a big Eagle cassette up to 52T – for £90 or ~$80€.
Then, it looks like they have entirely removed the upper B-knuckle – easy enough on this top-tier derailleur fromsince its pivots were already rebuildable. And Ratio swapped in their own – presumably 3D-printed metal – B-knuckle with a direct-mount interface to the UDH-ready dropout. That’s it. That’s all we know for now. No word on if, when, or how much the B-knuckle would cost, or what existing derailleurs would be compatible.
But we’ve reached out for a comment, and will certainly be closely watching Ratio’s social media feeds for further teases and more concrete details.