Wheels Manufacturing Wheels Manufacturing Universal Derailleur Hanger - 487, For Trek ABP MTB Frames designed to accept SRAM UDH, Black - The Squeaky Wheel Bike Shop | Palmdale, CA
Trek's ABP suspension design issued US patent - BikeRadar
Trek ABP Downhill Derailleur Hanger - Aberdeen Bike | Chelsea
TREK ABP Convert 142x12 | Alltricks.com
Trek ABP Convert Derailleur Hanger | Trek Bikes
Trek ABP Explained
Trek ABP Race Derailleur Hanger | Trek Bikes
Using a bike with Trek ABP on a trainer - Bicycles Stack Exchange