The Madone SLR 8 AXS Gen 8 is an ultra-aero, featherlight road bike that's built to race. Its 900 Series OCLV Carbon frame is not only aerodynamic, but also ultra-light for flying up climbs. Lightweight IsoFlow frame technology means that the Madone doesn’t sacrifice comfort for speed. To give you every aero advantage, the Madone SLR comes with RSL Aero Bottles and Cages that further reduce drag. This build comes ready to win with a SRAM RED AXS drivetrain with a power meter, carbon wheels and a Trek Aero RSL one-piece carbon bar/stem.
It's right for you if...Racing is a core part of your life, and you want a bike that's the trifecta of lightweight, aerodynamics and comfort. You want a featherweight frame that makes no compromises, with aerodynamic tube shaping and IsoFlow comfort technology. Performance matters, and you want Trek's highest-level carbon lay-up, tubeless carbon wheels and the wireless electronic shifting of SRAM RED AXS.
The tech you getAn insanely light frame made of Trek's highest-level 900 Series OCLV Carbon with aero tubing and IsoFlow comfort technology, and RSL Aero Bottles and Cages that save watts. A 2x12 SRAM RED AXS wireless electronic drivetrain with a power meter for getting more out of training. A universal derailleur hanger so you can get a replacement from anywhere. Plus, it's topped off with Bontrager Aeolus Pro 51 tubeless carbon wheels and a Trek Aero RSL one-piece bar/stem.
The final wordThe Madone SLR 8 AXS Gen 8 is an insanely light and aero road bike that's born from a racing pedigree to deliver pure speed. It's built from Trek's top 900 Series OCLV Carbon that keeps weight to a minimum without compromising stiff responsiveness and comfort.
Key Features & Benefits:
- 900 Series OCLV Carbon Frame:Mind-bogglingly light and stiff where you need the power, and compliant where you crave comfort.
- Bontrager Aeolus Pro 51 Wheels:Keep weight down and performance up, so you can crush climbs and soar down descents
- SRAM RED eTap AXS:SRAM's lightest package ever, plus an ultra-precise power meter to get more from training days.
Full Specification
- Frame:900 Series OCLV Carbon, Full System Foil tube shaping, IsoFlow seat tube, RCS Headset System, electronic-only routing, removable aero chain keeper, T47 BB, flat mount disc, UDH, 142x12 mm thru axle
- Fork:Madone Gen 8 full carbon, tapered carbon steerer, internal brake routing, flat mount disc, 12x100mm chamfered thru axle
- Number of Gears:12
- Gear Shifters:SRAM RED eTap AXS, 12-speed
- Chainset:SRAM RED AXS, power meter, 48/35, DUB,XS/S: 165 mm, M: 170 mm, ML/L: 172.5 mm, XL: 175 mm length
- Chainrings:48/35T
- Rear Cassette:SRAM XG-1290, 10-33, 12-speed
- Chain:SRAM RED D1, 12-speed
- Front Derailleur:SRAM RED AXS, braze-on
- Rear Derailleur:SRAM RED AXS, 36T max cog
- Bottom Bracket:SRAM DUB, T47 threaded, internal bearing
- Pedals:Not supplied:Shop pedals here
- Front Wheel:Bontrager Aeolus Pro 51, OCLV Carbon, Tubeless Ready, 100x12 mm thru axle
- Rear Wheel:Bontrager Aeolus Pro 51, OCLV Carbon, Tubeless Ready, Shimano 11/12-speed freehub, 142x12 mm thru axle
- Front Tyre:Bontrager Aeolus RSL RD, Tubeless-Ready, cotton construction, aramid bead, 170 tpi, 700x28 mm
- Rear Tyre:Bontrager Aeolus RSL RD, Tubeless-Ready, cotton construction, aramid bead, 170 tpi, 700x28 mm
- Brakes:SRAM
- Handlebars:Trek Aero RSL Road integrated bar/stem, OCLV Carbon, Race Fit, 80 mm reach, 124 mm drop, XS: 35 cm control width, 38 cm drop width, S: 37 cm control width, 40 cm drop width, M/ML/L: 39 cm control width, 42 cm drop width, XL: 41 cm control width, 44 cm drop width
- Handlebar Grips:Bontrager Supertack Perf tape
- Stem:Trek Aero RSL Road integrated bar/stem, OCLV Carbon, Race Fit, XS: 80 mm, S/M: 90 mm, ML/L: 100 mm, XL: 110 mm stem length
- Saddle:Bontrager Aeolus Pro, carbon rails, XS/S: 155 mm, M/ML/L/XL: 145 mm width
- Seatpost:Madone aero carbon seat post, 0 mm offset, short/long length
- Weight:
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.
Size Guide for Trek Madone SL/SLR Bikes
The Madone SL and SLR Gen 8 now use letter-based frame sizing rather than top tube length. Your appropriate frame size will primarily be based on height and inside leg measurement, as detailed in the chart below. This chart can give a recommendation on which size may be best for you, however for the best results, please
contact us or visit your
local Balfe’s store for a personal consultation and test ride.
| Frame Size | Rider Height (cm) | Rider Height (') | Inseam (cm) | Inseam (") |
| XS | 143 - 158 cm | 4'8" - 5'2" | 67 - 74 cm | 26" - 29" |
| S | 158 - 162 cm | 5'2" - 5'4" | 74 - 76 cm | 29" - 30" |
| M | 162 - 173 cm | 5'4" - 5'8" | 76 - 81 cm | 30" - 32" |
| ML | 173 - 179 cm | 5'8" - 5'10" | 81 - 84 cm | 32" - 33" |
| L | 179 - 188 cm | 5'10" - 6'2" | 84 - 88 cm | 33" - 35" |
| XL | 188 - 213 cm | 6'2" - 7'0" | 88 - 100 cm | 35" - 39" |
Geometry Information for Trek Madone SL/SLR Bikes
| Frame size letter | XS | S | M | ML | L | XL |
| Wheel size | 700c | 700c | 700c | 700c | 700c | 700c |
| A —Seat tube | 40.4 | 44 | 47.6 | 51.2 | 54.8 | 60.9 |
| B —Seat tube angle | 73.8° | 73.8° | 73.6° | 73.4° | 73.4° | 73.4° |
| C —Head tube length | 10 | 12.1 | 13.6 | 15 | 17.2 | 20.1 |
| D —Head angle | 71.6° | 72.2° | 72.9° | 73.5° | 73.8° | 73.9° |
| E —Effective top tube | 51.7 | 53.2 | 54.5 | 55.7 | 56.8 | 58.4 |
| G —Bottom bracket drop | 7.2 | 7.2 | 7 | 7 | 6.8 | 6.8 |
| H —Chainstay length | 41 | 41 | 41 | 41 | 41.1 | 41.2 |
| I —Offset | 5 | 4.5 | 4.5 | 4 | 4 | 4 |
| J —Trail | 6.1 | 6.2 | 5.8 | 5.9 | 5.7 | 5.7 |
| K —Wheelbase | 97.1 | 97.6 | 98.1 | 98 | 99 | 100.7 |
| L —Standover | 70.9 | 74 | 76.8 | 79.4 | 82.5 | 86.9 |
| M —Frame reach | 37 | 37.8 | 38.4 | 38.9 | 39.4 | 40.2 |
| N —Frame stack | 50.7 | 53 | 54.6 | 56.2 | 58.2 | 61 |
| Saddle rail height min (w/short mast) | 54.9 | 58.5 | 62.1 | 65.7 | 69.3 | 75.4 |
| Saddle rail height max (w/short mast) | 61.2 | 64.8 | 68.4 | 72 | 75.6 | 81.7 |
| Saddle rail height min (w/tall mast) | 59.2 | 62.8 | 66.4 | 70 | 73.6 | 79.7 |
| Saddle rail height max (w/tall mast) | 65.4 | 69 | 72.6 | 76.2 | 79.8 | 85.9 |
| Saddle rail height max (w/tall mast) | 65.5 | 68.5 | 71.5 | 74 | 76.5 | 79 |
Warranty Information for Trek:
Lifetime warranty on Frame sets (frame and rigid fork), main frame and full suspension swing arms for the lifetime of the original owner, and Bontrager wheels with carbon rims.
2-year warranty on Rear suspension linkage components, including bearings, rocker link and accompanying hardware and components, Bontrager wheels with alloy rims, Paint and transfers.
For full warranty policy please visit trekbikes.com
FAQs from TREK:
What is different about the Madone Gen 8 compared to the Madone Gen 7?
There are several all-new features on the Madone Gen 8:
– 900 Series OCLV carbon on SLR
– Full System Foil lightweight aero tube shapes
– Improved IsoFlow comfort tech is now lighter and more compliant
– RSL Aero Bottle and Cage system (included with SLR, available aftermarket for SL)
– RSL Aero bar/stem is lighter and more ergonomic (included with SLR)
– UDH (universal derailleur hanger)
– Premium Switch Pro chamfered thru-axles
– RCS Headset System
– 32 mm (width as measured) max tyre clearance
Where can I find details like max chain ring/rotor size, routing instructions, where to mount my lights, swapping cockpits, etc?
Please see the Madone Gen 8 service manual.
Does the Madone Gen 8 replace the Émonda?
The Madone Gen 8 is the direct replacement for both the aero-orientated Madone Gen 7 rider and weight-orientated Émonda rider. It is the evolution of both the new Émonda and the new Madone, with the benefits of both bikes now in one.
How much does the frame set weigh?
Size ML Madone SLR Gen 8 in Matte Gloss/Carbon Smoke (no hardware):
– Frame: 796 g
– Fork: 350 g
Why are there six sizes instead of eight?
After looking carefully at our sizing and geometry charts, Trek realised that the stack and reach measurements in our current line-up could be simplified into six frame sizes without a major impact to overall fit. Sizes 52 cm and 54 cm have been combined into one size (M) and size 62 cm has been replaced with a new XL frame. The XL frame features a taller seat mast, which allows a rider who is coming from a 62 cm Madone Gen 7 to achieve the same max saddle height on the new XL. This new sizing system still accommodates the same range of riders as when Trek had eight sizes, but now it’s easier to pick the right bike size the since there’s less overlap.
Has the geometry changed?
Trek now call the Madone geometry “Road Race” since this is more meaningful than “H1.5”, but Road Race geo brings a very similar fast and aggressive rider position compared to the previous H1.5 geometry.
Is IsoFlow adjustable?
No, IsoFlow is tuned to balance aerodynamics, weight and comfort across all frame sizes.
Is there internal storage?
No.
Is the seat post adjustable?
Yes. Like the Gen 7 Madone, the seat post wedge assembly is reversible to allow for a larger range of saddle height adjustment. Maximum and minimum seat height per frame size are shown in the Geometry tab on the bike’s Trekbikes.com product page.
What’s new about the RSL Aero bar/stem?
The bar/stem drops weight while improving ergonomics thanks to new blunted aero shaping. It maintains the same reach, drop and flare measurements as the Madone Gen 7 bar/stem. It also uses an updated Blendr mount. Note that this new blunted shaping has made the top of bar/stem 4 mm higher than before.
I don’t want to be 4 mm higher, what can I do?
Trek have designed a special RCS Race Low bearing top cover to account for the 4 mm increase in bar/stem height. The RCS Race Low bearing top cover is only available as an aftermarket part and will not come stock on the bikes. Please see the service manual for part number and installation instructions.
What’s new with the Aeolus RSL bar/stem Blendr mount?
A new, non-adjustable Blendr base/mount combo cuts grams and – on complete bikes – includes pucks for mounting either a Garmin or Wahoo computer. Also included is an all-new, easily removable front light mount. Need to ditch your front light for race day? Quickly and easily unscrew the light mount for maximum aero; no more swapping between mono and duo bases. Find more details in the service manual.
Is the new RSL Aero bar/stem compatible with mechanical shifting?
No.
Is the new RSL Aero bar/stem compatible with clip-on aero extensions?
No.
Tell me about those aero bottles and cages!
Included with the Madone SLR Gen 8, the all-new Trek RSL Aero Bottles hold 595 ml each, are BPA-free, dishwasher-safe and work seamlessly with the Madone Gen 8’s Full System Foil shaping to keep you fast (and hydrated) in the wind. The bottles fit perfectly flush into the included carbon RSL Aero Cages, which also work with a standard round bottle. The cages require a low-profile button-head bolt and are mounted via slots that allow you to move the cages up and down to achieve the most aero bottle position possible on any frame size. They will be available to purchase aftermarket for Madone SL Gen 8 riders.
How do I install the RSL Aero Water Bottle and Cage to maximise aerodynamic effect?
For the Madone Gen 8, install the seat tube cage first with the bottom of the cage as close to the bottom bracket as possible. Then, install the downtube cage with the bottom of the cage 1 cm away from the seat tube cage. Minimising the gaps between the frame and bottles will help you maximise aerodynamic efficiency. For other bikes, follow the same process as Madone Gen 8.
Are the RSL Aero bottles/cages compatible with other bikes?
While they were designed to work specifically with the tube shapes of the new Madone Gen 8, they can be mounted to most bikes that could use a standard round cage.
What colour RSL Aero bottles/cages will I get if I order a Madone SLR through Project One?
On all Project One tiers except ICON, cages will be painted to match the frame colour. ICON bikes get black cages (there isn’t enough surface area on the RSL Aero cages to apply ICON schemes). All bottles offered through Project One are black.
What’s the RCS Headset System? What stems are compatible with this bike?
Starting with the Madone SLR/SL Gen 8, the new RCS Headset System simplifies and standardises the parts needed to cover cockpit set-ups across models and between platforms:
– RCS Race: For use with the new RSL Aero bar/stem (included with Madone SLR Gen 8)
– RCS Pro: For use with the current RCS Pro Blendr stem (included with Madone SL Gen 8)
– RCS Universal: For use with traditional round stems
Trek road frames made for the RCS Headset System will use a consistent headset bearing cover and spacers depending on stem type (outlined above), so you’ll always know exactly what parts are needed to swap cockpits between models/platforms that feature the RCS Headset System. The Madone is just the beginning, look for RCS Headset System compatibility on future Trek road bikes, too. See the service manual for more details and part numbers.
Is it compatible with mechanical drivetrains?
The Madone SL Gen 8 is compatible with mechanical drivetrains whose front derailleurs have a housing stop. The Madone SLR Gen 8 is only compatible with electronic drivetrains because there is no exit port for the front derailleur housing on the downtube.
I want to run a 1x drivetrain, is the front derailleur mount removable?
Yes! Just like the Gen 7, you can easily remove your front derailleur mount for maximum aero gains and a sleeker aesthetic. See details in the service manual.
Are these bikes tubeless-compatible? What additional parts are required?
The Madone SL 6 and up come tubeless-ready with 28 mm tyres. Just add sealant (included) and air.
Will the Madone SLR Gen 8 be available in Project One?
Yes. However, the Madone SL Gen 8 will not be available in Project One.
Do I need a special repair stand?
Trek recommend using a repair stand that doesn’t clamp the frame/seat post, like the Feedback Sprint.
What is UDH (universal derailleur hanger)?
The Universal Derailleur Hanger consolidates thousands of hanger options across the industry. It protects your derailleur against chain jams by pivoting back and out of the way and slips slightly when encountering impacts. It improves shifting performance, guarantees better alignment and works with all drivetrains. Plus, if you ever need replacement, it will be available everywhere.
Learn more here
Anything else I should know?
The Madone SLR/SL Gen 8 accepts a 180 mm or 160 mm front rotor. The rear can be either 160 mm or 140 mm.