Trek Checkpoint ALR 4 Gen 3 campagnolo 21mm: 19-21mm internal rim width

21mm: 19-21mm internal rim width

The key innovation is in the 303 S's rim design

The laminate structure also contributes to 3 to 5 times the durability of conventional tape materials

Chain width is 5

this jacket is designed with a women's-specific fit for all-day comfort on long rides

Trek Checkpoint ALR 4 Gen 3 campagnolo 21mm: 19-21mm internal rim widthCheckpoint ALR 4 is an aluminum gravel bike perfect for dipping your toes into the roads less traveled. Its modern endurance geometry keeps you comfortable over gravel roads and potholes, and 50mm tire clearance gives you room for extra grip. It comes equipped with a carbon fork, Bontrager Paradigm wheels, 11 speed Shimano CUES 8000 shifting, hydraulic disc brakes, and tons of mounts for bags and gear.