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The All-New Trek Domane AL Gen 4 Gets a Half-Pound Lighter with More Room for Tires

Trek Domane AL Gen 4 Full red full bike
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Now on its fourth iteration, the Trek Domane AL is packed with updates, a lighter frame, and room for larger tires. The new Gen 4 Domane comes in economical offerings for the most bang for the buck and looks like a gateway bike for other disciplines.

The Domane AL is Trek’s entry-level do-it-all road bike boasts the most versatility in its lineup. The frame is aluminum, the fork is carbon, and the accessory mounts are plentiful, meaning this bike can do much more than a local fondo.

Trek Domane AL Gen 4 Full red full bike

Whats New — Trek Domane AL Gen 4

The Trek Domane AL is entering a new life in Gen 4, and it’s getting bigger all-road tire clearance (up to 38mm), a sleeker frame design with internal cable routing.

New Frame and Fork Material

Trek says the new Domane AL (complete bike) is around half a pound lighter than the previous Domane AL Disc model.

How? Mainly from the redesigned frame made with Trek’s 100 Series Alpha Aluminum and a new full-carbon fork.

Can it double as a gravel bike? Yes — Word from Trek is that the max tire size is 38mm, which seems true for most tires, though it depends on your rim width. We had zero problems getting a 40mm Maxxis Reaver tire rolling in the frame, but the chainstay clearance is slightly tight. It’s good that Bontrager makes the GR1 in a 35mm width; that tire on this bike would be fast and fun.

Don’t let the carbon fork fool you; it doesn’t make this bike less of an all-arounder. The fork and newly designed frame come with plenty of mounts for fenders, bag (top tube), and anything you can think of to improve your commuter or race.

Trek Domane AL Gen 4 Full UDH

Universal Derailleur Hanger

For the first time, Domane AL comes with a new thru-axle for Universal Derailleur Hanger compatibility. This design is the same UDH on Trek mountain bikes. This means fewer hangers around the basement and more cross-category compatibility with other bikes.

What’s That Handlebar?

The front end is more modern on the new Domane, thanks partly to the headset’s internal cable routing and an updated bar. The Trek Domane AL Gen 4 gets a modern road bar with a shorter reach and a 4mm flare between the hoods and drops.

Trek Domane Geo

Trek Domane AL Gen 4 Geometry

The geometry remains unchanged for the Domane AL from previous versions. The setup is the Trek endurance geometry, which isn’t too aggressive and laid back enough for newer riders to feel comfortable.

Available Sizes: 44, 49, 52, 54, 56, 58 and 60cm

Trek Domane AL Gen 4 Full four logo

Trek Domane AL Gen 4 Models and Pricing

The new Trek Domane AL Gen 4 comes in three different build options, starting at $1,200 and tops out at $2,000. All have the same updated 100 Series Alpha Aluminum frame and a new full-carbon fork.

Trek Domane AL Gen 4 Full cranksetTrek Domane AL Gen 4 Full crankset

The difference is in the components and hubs. All three bikes feature the same handlebar/stem, saddle, rims, and seatpost.

Where they differ is the top-end 105 version gets Bontrager Alloy sealed bearing hubs, and the Claris and Tiagra versions get Formula RX-512 alloy hubs.

Top Level Domane AL 4 Gen 4

  • Groupset: Shimano 105
  • Weight: N/A
  • Price: $2,000

Mid Level Domane AL 3 Gen 4

  • Groupset: Shimano Tiagra
  • Weight: 22.82lbs/10.35kg
  • Price: $1,700

Entry Level Domane AL 2 Gen 4

  • Groupset: Shimano Claris
  • Weight: 23.26lbs/10.50kg
  • Price:$1,200

Trek Domane AL Availability

Those looking to test ride or purchase a Domane AL are currently available globally on Trekbikes.com and through Trek’s global network of retail partners.

Look for a review of the Trek Domane AL 3 shortly as we put it through the paces this fall alongside the new Bontrager Aeolus Pro 49V wheels.

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Norman Mattson
Norman Mattson
10 hours ago

How about dropping weights in metric too. Can’t be that difficult.

9 hours ago

The “brake bridge” in the photos is for mounting fenders and need not be installed for normal use…the formed headtube is also not new, my 2018 Emonda ALR has a hydroformed headtube, also. Glad Trek is still making aluminum road bikes, though.

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