Sigeyi 直裝 UDH 掛勾

This is a Sigeyi direct-mount UDH (Universal Derailleur Hanger) — the SRAM-standard hanger used across modern MTB and gravel frames from Specialized, Trek, Pivot, Santa Cruz, Yeti, YT, Canyon, Ghost, GT and others that have adopted UDH geometry. Machined from 7075-T6 aluminum on a single billet for stiffer, truer alignment than the stamped original, and dimensioned to within 0.02mm of SRAM's UDH spec.