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Aluminium endurance road bike Trek Domane AL 4 Tiagra gloss supernova 11-speed

Aluminium endurance road bike Trek Domane AL 4: Shimano Tiagra 2x11, 11-36 cassette and carbon fork, 10.10 kg

$1,681.76 Incl. Tax

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Trek Domane AL 4: the step up to make progress

The Trek Domane AL 4 Gen 4 pairs the Alpha Series 100 aluminium frame and carbon fork of the Domane AL with a Shimano Tiagra 2x11 drivetrain, for 10.10 kg in size 56. The 11-36 cassette gives it real reserves for the climbs, and the 11-speed spacing makes changes of pace smoother. In Gloss Supernova, a glossy brown set off with black, it shows understated elegance.

Technical specifications

Frame	Alpha Series 100 aluminium, tapered head tube, internal cable routing, mudguard mounts, UDH hanger, 142x12 mm thru axle
Fork	Domane AL full carbon (carbon tapered steerer), mudguard mounts, Flat Mount, 12x100 mm thru axle
Drivetrain	Shimano Tiagra R4000 2x11, 50/34 chainset, Shimano RS400 11-36 cassette, LG500 chain
Brakes	Flat Mount disc brakes, Shimano RT66 160 mm rotors
Wheels / tyres	Formula hubs, Bontrager Paradigm 23 Tubeless Ready rims / Kwaremont Comp Hard-Case Lite 700x32 mm
Cockpit	Bontrager Comp alloy handlebar, width depends on size; Bontrager Elite 7° stem, Blendr compatible
Saddle / seatpost	Verse Short Comp 145 mm / Bontrager Comp alloy 27.2 mm, length depends on size
Weight	10.10 kg in size 56 (Trek figure)

At a glance

✓ Alpha 100 alloy frame, carbon fork	✓ Shimano Tiagra 2x11
✓ 11-36 cassette for the cols	✓ 32 mm tyres, Tubeless Ready rims
✓ Mudguard mounts	✓ 10.10 kg in size 56

Who is it for?

For the rider who has done their first seasons on an entry-level bike and wants to progress, the athlete coming from running or triathlon who is discovering road cycling, or anyone who doesn't want to sell their bike after a year. It remains affordable while offering a more refined drivetrain.

The LVR workshop view

Alpha aluminium, Trek's expertise. Under the Domane AL 4, Trek uses its Alpha Series 100 alloy, chosen to withstand everyday use and accept mudguards, a top tube bag or wider tyres. The fork is carbon, steerer included, which softens the steering on rough surfaces. Universal UDH derailleur hanger and thru axles: spare parts are easy to find, a detail that matters on the day of a crash.

	Alpha 100 (Domane AL)	Alpha 300 (Émonda ALR)	OCLV 500 carbon (Domane SL)
Level	The Domane AL aluminium	Trek's lightest aluminium	Entry-level road carbon
Construction	Welded tubes, carbon fork, plenty of mounts	Invisible Weld technology, the look of a carbon frame	Layers compacted under heat and pressure
Reference bike	Domane AL 4: 10.10 kg (size 56)	Émonda ALR 5: 9.17 kg (size 56)	Domane SL 5 Gen 5: 8.84 kg (size ML)
What it means	Mudguards possible, versatility, sensible budget	Livelier and lighter, 28 mm tyres max	Lighter still, Trek lifetime warranty on the frame

The key point: at this level of the range, the weight difference with Alpha 300 comes down to tube design and mounts, not to a difference in quality. In return, Alpha 100 accepts winter equipment, which the Émonda ALR doesn't cater for.

Going from 8 to 11 speeds transforms group riding: the closer gaps let you keep a steady cadence when the bunch speeds up. The RS400 11-36 cassette paired with the 50/34 offers a very low gear that makes steep gradients manageable even with average fitness.

It is this low 34x36 that leads us to recommend the AL 4 for tackling the cols of the Espinouse or the climb to Saint-Pons-de-Thomières. The LG500 chain is built to last: with regular lubrication, it needs replacing less often, and we check its wear every time it comes into the workshop.

Which road bike should you choose?

Model	Material	Drivetrain	Wheels	Weight (size)
Domane AL 2	Alpha 100	Shimano Claris 2x8	Paradigm 23 alloy	10.35 kg (56)
Domane AL 4	Alpha 100	Shimano Tiagra 2x11	Paradigm 23 alloy	10.10 kg (56)
Domane AL 5	Alpha 100	Shimano 105 2x12 mechanical	Paradigm 23 alloy	9.80 kg (56)
Domane SL 5 Gen 5	OCLV 500 carbon	Shimano 105 mechanical	Aluminium	8.84 kg (ML)

Our take: compared with the AL 2, the AL 4 saves 250 g and gains three speeds and a 36-tooth sprocket. The AL 5 takes off another 300 g with 12-speed 105; for a rider who is progressing, the AL 4 offers the best balance between equipment and budget.

LVR sizing advice

If you are unsure, the smaller size gives livelier steering, the larger one more stability on long descents. Cranks, handlebar and stem follow the size.

Size	44	49	52	54	56	58	61
Rider height (cm)	150-153	156-163	163-168	168-174	174-180	180-185	185-191
Inseam (cm)	71-73	74-77	76-79	78-82	81-85	84-87	86-90
Cranks (mm)	165	165	165	165	165	170	170
Handlebar / stem	36 / 70	38 / 80	38 / 90	40 / 90	40 / 100	40 / 100	42 / 110

Source: Trek size guide. Bike fitting available in our Béziers shop.

Your questions

Why 11 speeds?	Finer gaps between sprockets, so a steadier cadence.
Climbing cols?	Yes, the 34x36 gives a very easy gear for long gradients.
Difference from the AL 2?	Same frame; Tiagra 2x11, 11-36 cassette and 250 g less.
Mudguards in winter?	Yes, the frame and fork are drilled to take them.

The LVR Cycles verdict

The most coherent Domane AL for making progress: identical frame, a much more enjoyable drivetrain than on the AL 2. We recommend it to the rider who already knows they will ride often.

Pros
+ Very easy 11-36 cassette on climbs
+ Smooth 11 speeds
+ Upgradeable, versatile frame

Cons
- 10.10 kg in size 56
- Entry-level alloy wheels

Why buy from LVR Cycles? Our Béziers workshop prepares and adjusts your Domane AL 4 before handover, and our advisers point you towards the rides and cols worth doing in the area.

Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.

Reference TRK-5345590

Data sheet