I am hoping someone can relieve my concern. A while back I purchased a new Mavic Crossride Disc/Rim Brake wheel from my LBS. I have had trouble from from the start aligning brake pads to the rim, as the braking surface seems very narrow. Since then, I purchased a matching front wheel off of Ebay. I noticed right away that the front wheel has the wear indicator groove while the rear does not. I didnt pay much attention till now as I am changing pads and am having trouble aligning them. I thought narrower cartridge pads would solve the problem. I measured the rim surface on the front and compared it to the back. Front is 9-10mm while the back is around 8.5-9mm. Is it possible that the lbs sold me a disc only rear wheel or is it just an older model?.