Sonoma Men's Chainless Drive Evolution Urban Voyager Bicycle Chainless men's bicycle with lightweight aluminum frame and suspension fork D-Drive system eliminates chain and derailleur for low-maintenance, comfortable riding Chainless system is quieter, smoother, and lasts longer than traditional chain-driven systems Ergonomic seat ideal for long rides; pull-lever front and rear alloy brakes Includes water bottle mounts and rear carrier rack; lifetime warranty on frame, fork, and D-Drive system