Trek Domane AL 5 Gen 4 Bike Size:56 Your first layer under your

Your first layer under your helmet to keep out the cold

Hood has a stiffened brim and is helmet compatible

With thigh vents and a warm backer to keep you comfortable from the slopes to the summit

and a super responsive midsole featuring up to 10% Bloom™ foam — a material made with algae biomass harvested from freshwater sources

from wrist gaiters to a snap away snow skirt and more

Trek Domane AL 5 Gen 4 Bike Size:56 Your first layer under yourDomane AL 5 is a smooth, capable road bike built for riders who want performance without sacrificing comfort. Its Alpha Aluminum frame pairs with a 12 speed Shimano 105 drivetrain for precise shifting and a wide gear range. All day geometry keeps you comfortable on longer rides, while bigger tire clearance and top tube mounts add versatility for light gravel, gear, or daily commutes.