Purchased Marin bicycle from Big Wheel bikes in Bethesda MD. {$600} within one day of riding around rear wheel weird and very noisy. Found out that only about 60 percent of the spokes were actually 'truing' the wheel; all the other spokes were just barely tightened. Walked the bike back to store; "retrued' in rapid (less than 5 minutes) fashion, next day same problem!! Went back again to repeat, guy there indicated it is difficult to fix these problems from Marin. Two days ago tried to tell Marin, no response; lots of good bikes out there Marin ain't one of them.