The Trek Madone SL Gen 8 Frameset provides the foundation for a lightweight, aerodynamic road race build. Its 500 Series OCLV Carbon construction is engineered to balance stiffness, low weight and compliance, while Full System Foil tube shaping provides the aerodynamic profile of Trek's eighth-generation Madone platform.
IsoFlow technology is integrated into the seat tube to add compliance for longer rides without sacrificing the frame's race-focused aerodynamic design. The frameset also incorporates Trek's RCS Headset System and internal brake routing for a clean, integrated build.
Compatibility with electronic or mechanical drivetrain routing gives flexibility when choosing components, while a T47 bottom bracket, UDH interface and flat-mount disc brake standard provide the foundation for a modern race build. Clearance is provided for tyres measuring up to 32mm.
Features & Benefits:
- Lightweight Aero Race Platform: 500 Series OCLV Carbon combines with Full System Foil tube shaping to balance low weight, stiffness and aerodynamic performance for road racing.
- IsoFlow Ride Compliance: Trek's IsoFlow seat tube technology adds compliance for longer rides while maintaining the Madone's speed-focused aerodynamic design.
- Flexible Build Compatibility: Electronic or mechanical drivetrain routing, a T47 bottom bracket, UDH interface and clearance for tyres measuring up to 32mm provide flexibility when creating your ideal build.
Full Specification:
- Frame: 500 Series OCLV Carbon, Full System Foil tube shaping, IsoFlow seat tube, RCS Headset System, electronic or mechanical routing, removable aero chain keeper, T47 bottom bracket, flat-mount disc, UDH, 142x12mm thru axle
- Fork: Madone Gen 8 full carbon, tapered carbon steerer, internal brake routing, flat-mount disc, 12x100mm chamfered thru axle
- Front Wheel: Bontrager Switch chamfered thru axle
- Rear Wheel: Bontrager Switch chamfered thru axle with removable lever
- Front Tyre: Maximum measured tyre size 32mm
- Rear Tyre: Maximum measured tyre size 32mm
- Brakes: Flat-mount disc compatible; maximum brake rotor size 180mm front and 160mm rear
- Max System Weight: 125kg (275lb), combined maximum weight of bicycle, rider and cargo
- Weight: 1,054g frame (ML, painted); 363g fork (painted)
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
– 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 Trekhad 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 size seat post will be delivered with each bike?
Sizes XS, S and M will be delivered with the short 0 mm offset seat post. Sizes ML, L and XL will be delivered with the long 0 mm offset seat post.
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.
Is the new RSL Aero bar/stem compatible with clip-on aero extensions?
No.
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.
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.
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.