I run 12/47 on mine. Shifting in 1st/2nd you do 'now'. Very short. After that it isn't as noticeable to me. I didn't notice any buzzing on this setup. With mods and this gearing popping the front up in 1->3 is easy, havn't tried 4->6 yet. I am considering going to 48 on the back running the 12 up front for dirt and 13 for commuting.