Buying Guide

If you’ve been shopping for a gravel bike recently — new or used — you’ve probably run into the term UDH and wondered whether it matters for what you’re building. The short answer is: it depends on what groupset you want to run. The longer answer is that a lot of popular gravel frames have had their dropouts quietly updated mid-generation, which means two bikes with the same name and similar looks can have very different futures when it comes to drivetrain compatibility. ...

If you’re shopping for a gravel bike and want to run SRAM’s 13-speed XPLR ecosystem — or just want the future-proofing that UDH brings — the first question is whether the frame you’re considering actually has it. We’ve pulled every gravel bike currently listed on SRAM’s official Bike Finder with the UDH filter applied, as of May 2026. A note before you use this list: This is sourced directly from SRAM’s Bike Finder tool and reflects only the bikes SRAM has listed there. It is not an exhaustive list of every UDH-compatible frame on the market — there are likely other frames from brands not represented in the Bike Finder, particularly smaller builders and direct-to-consumer brands, that also use the UDH standard. Always verify directly with the frame manufacturer before purchasing, especially on the used market where model year matters. ...