For sale: Shimano XTR RD-M9100 12-speed rear derailleur, mechanical version, used only twice and in as-new condition. This is Shimano’s top-of-the-line mountain bike derailleur, designed for maximum precision, lightweight performance, and reliability in demanding XC and marathon conditions. It features Shimano’s Shadow RD+ clutch system for silent, stable chain control and is fully compatible with XTR, XT, and SLX 12-speed (Micro Spline 10-51 T) drivetrains. The derailleur has no scratches, damage, or play — it shifts as crisp as new. Ideal for riders who value top mechanical performance without going electronic. Selling because of an upgrade. ➡️ Optional: matching XTR SL-M9100 shifter available for €90extra.