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Carbon aero road bike Trek Madone SLR 9 AXS 1x RED serpentine 12-speed

Carbon aero road bike Trek Madone SLR 9 AXS 1x serpentine red: RED E1 1x12, power meter, 6.40 kg in ML

£9,589.21 Incl. Tax

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Trek Madone SLR 9 AXS 1x serpentine: the red for timed climbs

400 g lighter than the UCI limit, the Trek Madone SLR 9 AXS 1x Gen 8 weighs 6.40 kg in size ML according to Trek. It brings together OCLV Series 900 carbon, a SRAM RED E1 1x12 drivetrain with power meter and, for this colour, Bontrager Aeolus RSL 43X carbon wheels. The Serpentine paintwork takes the frame from a deep dark red to a bright red.

Technical specifications

Frame	OCLV Series 900 carbon, Full System Foil tubes, IsoFlow, RCS headset, T47 threaded bottom bracket, UDH hanger, tyres up to 32 mm
Fork	Madone Gen 8 full carbon, carbon tapered steerer, Flat Mount, 12x100 mm thru axle
Drivetrain	SRAM RED E1 single chainring 1x12, 48-tooth chainring with power meter, XG-1290 10-36 cassette
Brakes	Flat Mount hydraulic disc brakes, SRAM Paceline X 160 mm Centerlock rotors
Wheels / tyres	Bontrager Aeolus RSL 43X carbon / Pirelli P Zero Race RS 700x28 mm
Cockpit	Trek Aero RSL one-piece bar/stem in OCLV carbon, Race Fit, width depends on size
Saddle / seatpost	Bontrager Aeolus RSL carbon rails 145 mm / Madone aero seatpost, 0 mm offset
Weight	6.40 kg in size ML (Trek figure), below the UCI limit of 6.8 kg
Max. weight	125 kg (rider, bike and luggage)

At a glance

✓ OCLV 900 carbon frame and fork	✓ SRAM RED E1 1x12, no front derailleur
✓ 48 chainring with power meter	✓ 10-36 cassette for the cols
✓ Aero RSL one-piece bar/stem	✓ 6.40 kg in size ML

Who is it for?

For the climber who likes to test themselves on timed climbs, for the cyclist preparing a personal challenge in the mountains, or for the enthusiast who wants an ultralight Madone in a bold colour.

The LVR workshop view

OCLV carbon, Trek's signature. For its lightest Madone, Trek did not invent a new frame: it uses the same OCLV Series 900 structure as the other SLR models, and the extra grams disappear elsewhere. The process, used since 1992, involves pressing the carbon plies under heat until the micro-bubbles are driven out; a higher series number reflects a more efficient layup, so less material for the same strength. The painted frame weighs 796 g in ML and is still covered for life.

	OCLV 900 (Madone SLR)	OCLV 500 (Madone SL)	OCLV 800 (Speed Concept)
Level	Trek's most refined carbon	Entry-level road carbon	Trek's former top-end road carbon
Construction	3D moulding, reduced ply overlaps	Same process, more generous lay-up	Proven lay-up, integration comes first
Reference bike	Madone SLR: painted frame 796 g (ML), fork 350 g	Madone SL: painted frame 1,054 g (ML), fork 363 g	Speed Concept SLR: painted frame 1,522 g
What it means	271 g less than the SL on frame and fork; up to 20% stronger than OCLV 800	Same aero shapes, separate bar and stem, gentler budget	Still very high-performing, reserved for triathlon at Trek

In other words: the carbon is exactly the same as on the double-chainring Madone SLR models. What sets this 1x apart is a build designed gram by gram, with no front derailleur or second chainring, and lighter wheels and tyres; so you get the stiffness of OCLV 900 in an even sharper version.

For this colour, Trek's spec sheet lists Aeolus RSL 43X wheels and cranks from 160 to 170 mm depending on size, whereas the other 1x colours list RSL 37 and longer cranks. These 43 mm rims offer a good compromise between lightness on climbs and holding speed on the flat, and the shorter cranks make a high cadence easier on steep slopes.

The power meter built into the 48-tooth chainring becomes your best ally for pacing your effort on a timed climb: going out too fast always costs you in the last kilometre. The 28 mm tyres, versus 25 mm on the old Madone, give more grip on the technical descents on the way back.

Which Madone should you choose?

Model	Carbon	Drivetrain	Wheels	Weight (size)
Madone SLR 9	OCLV 900	Shimano Dura-Ace Di2	Aeolus RSL 51 carbon	7.05 kg (ML)
Madone SLR 9 AXS	OCLV 900	SRAM RED AXS E1 + power meter	Aeolus RSL 51 carbon	7.00 kg (ML)
SLR 9 AXS ICON editions	OCLV 900	SRAM RED AXS E1 + power meter	Aeolus RSL 65X carbon	6.90 kg (ML)
Madone SLR 9 AXS 1x	OCLV 900	SRAM RED E1 1x12 + power meter	Aeolus RSL 37 carbon	6.40 kg (ML)

Our take: this 1x is the lightest Madone, 600 g below the SLR 9 AXS; it will not suit a UCI race without ballast. The ICON editions, at 6.90 kg, keep two chainrings for more versatility.

LVR sizing advice

With a single chainring, cadence matters even more: crank length follows the size, so bear it in mind if you are torn between two frames. If in doubt, the smaller size gives a more aggressive position, the larger one more stability on descents.

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 (mm)	160	160	165	165	170	170
Bar width at the hoods (cm)	35	37	39	39	39	41

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

Your questions

Which stock wheels?	Bontrager Aeolus RSL 43X carbon, as listed by Trek for this colour.
What does it weigh?	6.40 kg in size ML, as claimed by Trek for the Madone SLR 9 AXS 1x.
Federation racing possible?	Only with ballast to a minimum of 6.8 kg.
Charging the groupset?	Yes, SRAM AXS battery supplied with its charger.

The LVR Cycles verdict

An ultralight Madone for climbers racing against the clock, in a very bold red. Its RSL 43X carbon wheels complete a mountain-focused build.

Pros
+ Under 6.5 kg in size ML
+ Chainring power meter
+ Bold Serpentine red

Cons
- Aggressive position on long climbs
- Not UCI compliant without ballast

Why buy from LVR Cycles? In our Béziers shop, we prepare your Madone, fit it to your build and service it in our workshop.

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-5347498

Data sheet