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Carbon endurance road bike Trek Domane SLR 9 Dura-Ace Di2 serpentine 12-speed

Carbon endurance road bike Trek Domane SLR 9 for climbing: 7.34 kg, Dura-Ace Di2 2x12, RSL 51 carbon wheels

£8,338.34 Incl. Tax

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Trek Domane SLR 9: a Domane built for the mountains

Light for an endurance bike, the Trek Domane SLR 9 Gen 5 weighs 7.34 kg in size ML thanks to its OCLV Series 900 carbon, Shimano Dura-Ace Di2 2x12 groupset and Aeolus RSL 51 wheels. On the slopes, this lightness combines with a fairly upright position for holding long climbs without tensing up. Its Serpentine paintwork pairs a very dark red with a brighter red, a colour that won't go unnoticed at the top of a col.

Technical specifications

Frame	OCLV Series 900 carbon, internal cable routing, bag and mudguard mounts, UDH, threaded T47, tyres up to 40 mm (35 mm with mudguards)
Fork	Domane SLR carbon, tapered steerer, carbon dropouts, mudguard mounts, Flat Mount, 12x100 mm thru axle
Drivetrain	Shimano Dura-Ace R9250 Di2 2x12, R9200 50/34 chainset, 11-34 cassette, BT-DN300 battery
Brakes	Flat Mount hydraulic discs, Shimano CL900 160 mm Centerlock rotors
Wheels / tyres	Bontrager Aeolus RSL 51 carbon / Kwaremont RSL 700x35 mm Tubeless Ready, 320 tpi
Cockpit	Bontrager Pro Riser carbon handlebar (20 mm rise, 70 mm reach), Trek RCS Pro -7° stem, dimensions depend on size
Saddle / seatpost	Verse Short Pro carbon rails 145 mm / Bontrager RSL carbon 27.2 mm, 5 mm offset
Weight	7.34 kg in size ML (Trek figure, with inner tubes)
Max. weight	125 kg (rider, bike and kit)

At a glance

✓ OCLV 900 carbon, frame and fork	✓ Shimano Dura-Ace Di2 2x12
✓ Aeolus RSL 51 carbon wheels	✓ 35 mm tyres, 40 mm clearance
✓ Pro Riser carbon raised handlebar	✓ 7.34 kg in size ML

Who is it for?

For the regular climber who collects the cols of the Caroux, the Espinouse or the Montagne Noire and no longer wants to choose between low weight and comfort. It is also an excellent companion for a mountain trip for anyone preparing a sportive with a demanding profile.

The LVR workshop view

OCLV carbon, Trek's signature. On a climb, every gram of the frame is felt, and that is where OCLV 900 earns its place. Born of Trek's 1992 process, which drives out micro-voids through hot compaction under pressure, it is moulded in 3D in a rigid mould, with a minimum of overlaps. On the Domane, this means about 220 g less than an SL frame in OCLV 500, and up to 20 % more strength than the previous OCLV 800. The rest comes from the parts: Aeolus RSL wheels and Dura-Ace make it lighter than the SLR 7, with an identical frame.

	OCLV 900 (Domane SLR)	OCLV 500 (Domane SL)
Level	Trek's most advanced carbon	Entry-level carbon of the road range
Construction	Rigid 3D moulding, reduced fibre overlaps	More generous layup with more material
Gen 5 Domane frame	approx. 835 g (unpainted, size ML)	approx. 1,055 g
What it means	About 220 g less on the frame; up to 20 % stronger than the previous OCLV 800	Same process, heavier and more affordable frame

One point deserves thought: 50/34 and 11-34 gearing is more demanding than the 48/35 and 10-36 of the SRAM versions. As the rear derailleur is limited to 34 teeth, the SLR 9 AXS is the one to look at if you want more in reserve on steep gradients. On descents, the 160 mm rotors and the stiffness of the frame give plenty of confidence in hairpins.

Dura-Ace R9250 Di2 keeps a 50/34 and an 11-34 cassette, classic sportive gearing, with crisp shifts even under load. At every service, our workshop updates the Di2 system; the threaded T47 bottom bracket makes bearing replacement simple.

Which Domane should you choose?

Model	Carbon	Drivetrain	Wheels	Weight (ML)
Domane SLR 7	OCLV 900	Shimano Ultegra Di2 2x12	Aeolus Pro 51	7.66 kg
Domane SLR 9	OCLV 900	Shimano Dura-Ace Di2 2x12	Aeolus RSL 51	7.34 kg
Domane SLR 9 AXS	OCLV 900	SRAM RED AXS 2x12 + power meter	Aeolus RSL 51	7.29 kg
Domane SLR 9 AXS 1x	OCLV 900	SRAM RED XPLR AXS 1x13 + power meter	Aeolus RSL 37	6.63 kg
Domane SLR 9 AXS No. 76	OCLV 900	SRAM RED AXS 2x12 + power meter	Aeolus RSL 37	7.19 kg

Our take: with an identical frame, the SLR 9 weighs 320 g less than the SLR 7 (7.34 against 7.66 kg) thanks to Dura-Ace and RSL wheels. The SLR 9 AXS saves only 50 g more, but adds a power meter and a 48/35 that is easier on climbs.

LVR sizing advice

Between two sizes: the smaller one if you lack flexibility, the larger one if you have a long torso. Handlebar, stem and cranks follow the size.

Size	XS	S	M	ML	L	XL
Rider height (cm)	143-158	158-162	162-173	173-179	179-188	188-199
Inseam (cm)	67-74	74-76	76-81	81-84	84-88	88-100
Cranks	160	160	165	165	170	170
Handlebar / stem	36 / 80	38 / 90	40 / 100	40 / 110	42 / 110	42 / 120

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

Your questions

Light enough for the mountains?	Yes, 7.34 kg in ML; the 50/34 and 11-34 do, however, call for strong legs.
Fitting a bigger cassette?	No, the Dura-Ace derailleur is limited to 34 teeth; look at the SLR 9 AXS.
Braking on descents?	160 mm hydraulic discs front and rear, very reassuring.
Wider tyres?	Possible up to 40 mm without mudguards, for rough mountain roads.

The LVR Cycles verdict

A light, reassuring Domane that makes you want to go and tackle the cols of the hinterland every weekend. We recommend it to the trained climber; if you are looking for easier gearing, look at the AXS version.

Pros
+ Highly precise Dura-Ace Di2
+ Top-end Aeolus RSL 51 wheels
+ 7.34 kg with 35 mm tyres

Cons
- No power meter
- 11-34 cassette demanding on steep gradients
- 51 mm rims sensitive to crosswinds

Why buy from LVR Cycles? With us, the bike is prepared in the workshop, adjusted to your body if you wish and maintained by a team that knows the Trek range.

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-5349996

Data sheet