Domane AL 4 is a versatile road bike that’s ideal for riders looking to go faster and farther on every ride. Its Alpha Aluminum frame and all-day comfort geometry pair with an 11-speed Shimano Tiagra drivetrain for smoother shifting and better range than entry-level builds. With top tube mounts, larger tire clearance, and confident handling, it’s ready for everything from long group rides to adventurous gravel detours.

Lightweight design

A new full carbon fork and updated frame design helps shave around half a pound from the previous generation Domane AL Disc.

Right for any road

Room for bigger tires let you ride everything from smooth pavement to most gravel roads in comfort.

Long-haul comfort

A more upright road riding position keeps you comfortable, confident, and efficient during long days in the saddle.

Pack it up, pack it in

Mounts for a top tube bag, rack, fenders and water bottles let you carry everything you need for day-long adventures, fast commutes, and anything in between.

Modern ergonomics, premium integration

A modern handlebar with 4cm of flare between the drops and hoods put you in a more comfortable position, and new hidden cable routing offers premium integration typically found on more expensive models.

High-value performance

Domane AL Disc is built in Trek's road race heritage, which means it's a road bike you won't outgrow as your rides get longer and faster.

Frame	100 Series Alpha Aluminum, tapered head tube, internal routing, fender mounts, flat mount disc, UDH, 142x12mm thru axle
Fork	Domane AL carbon, tapered carbon steerer, internal brake routing, fender mounts, flat mount disc, 12x100mm thru axle
Tire	Bontrager Kwaremont Comp, Hard-Case Lite, wire bead, 60 tpi, 700x32mm
Hub Front	Formula RX-512 alloy, 6-bolt, 100x12mm thru axle
Hub Rear	Formula RX-142 alloy, 6-bolt, Shimano 11-speed freehub, 142x12mm thru axle
Rim	Bontrager Paradigm 23, Tubeless Ready, 24-hole, 23mm width, Presta valve
Skewer Front	Bontrager Switch chamfered thru axle
Skewer Rear	Bontrager Switch chamfered thru axle, removable lever
Shifter	Shimano Tiagra R4020 // Shimano Tiagra R4020
Front Derailleur	Shimano Tiagra R4000, down swing
Rear Derailleur	Shimano Tiagra R4000
Crank	Shimano Tiagra R4000, 50/34, 165mm length
Bottom Bracket	Shimano RS501 BSA
Cassette	Shimano RS400, 11-36, 11 speed
Chain	Shimano LG500, 9/10/11 speed
Brake Rotor	Shimano RT66, 6-bolt, 160mm
Saddle	Verse Short Comp, steel rails, 145mm width
Seatpost	Bontrager Comp, 6061 alloy, 27.2mm, 8mm offset, 330mm length
Handlebar	Bontrager Comp, alloy, 31.8mm, 80mm reach, 121mm drop, 38cm control width, 42cm drop width
Stem	Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length

Geometry Chart

B B Drop	8
Chainstay Length	42
Eff Top Tube	53
Frame Reach	37.1
Frame Size Number	52cm
Frame Stack	56.1
Head Angle	71.3°
Head Tube Length	14.5
Offset	5.3
Seat Tube	47.5
Seat Tube Angle	74.2°
Standover	73.5
Trail	5.9
Wheelbase	100.3
Wheel Size	700c