Podcast 066 – What’s up with… the SRAM UDH?
When we learned that it used mixed materials, I wondered what else we didn’t know about this now nearly ubiquitous mountain bike component. So I called up SRAM MTB marketing manager Chris Mandell to learn more, and it’s surprising just how much there is to know about this tiny part.” episode, a new format where I’ll be exploring parts and technologies that most of us ride every day but have secrets to tell.
Take a closer look at the UDH and you’ll see the alloy body with plastic overmolded around it. That plastic material acts like a washer between the frame and hanger, letting it “slip” and rotate up and back to protect the derailleur in an impact. In most cases, you can simply rotate it back into position and resume your ride. But, should it actually break, a replacement is easy to find at most shops and guaranteed to fit any UDH-equipped bike.
The plastic is also ramped to guide your chain back onto the smallest cog if it happens to jump off. That ramp also protects the frame a little, too. SRAM may have trademarked “UDH”, but the design is an open standard anyone can use. Others, like Wheels Manufacturing, are
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