Populo Bikes Fixed Gear Single Speed Urban Fixie Road Bike Populous fixed gear line brings high quality Manufacturing directly to the people at prices set for the people Endurance tested high tensile steel fully tig-welded frame Sleek 45mm deep V alloy rims Single speed or fixed gear ready flip-flop hubs Includes neco treadles 1-1/8 inch headset, front radius forged alloy brakes, and 25.4mm forged alloy seat post