but its only doing it when I'm on the small crank in front.
Started noticing it when doing some hills yesterday. Really noticeable in only one gear. Pretty new Ridley w/ Ultregra set up logged about 500 mi. Never had any problems before now.
Checked alignment with cassette seems right on. I'm thinking test ride tweak cable tension screw. Bike shop 45 minutes away.
Try going 1/4 turn tighter on the cable adjusting screw on the derailleur, then another 1/4 turn until the rubbing stops. Keep track of your rotations and don't go hog wild. Use the adjusting barrel up front for fine tuning.