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2021 Trek Madone SLR switches to OCLV 800 carbon, saving a claimed 80g

Madone SLR borrows carbon layup developed for the Emonda

Trek has announced an updated Madone SLR for 2021, the aero race bike getting the OCLV 800 carbon that Trek developed for the recently released Emonda SLR. Trek has also switched the Madone to the T47 threaded bottom bracket standard in a move that also follows the new Emonda SLR. Choose your spec carefully and Trek says that there is a 450g weight saving to be made.

If you're thinking that the 2021 Madone doesn't look a whole lot different from the 2020 model then don't worry, you're eyes aren't deceiving you. Trek is keeping things the same aesthetically with the updated 2021 Madone. The same deep Kammtail Virtual Foil aerodynamic tube shapes have been used along with the adjustable top tube IsoSpeed decoupler. 

The front end features neatly hidden cable routing and rim brake users will be relieved to see that the frameset still comes in both rim and disc brake builds, unlike the Emonda which is disc only. The rim brake model however, is simply a carryover from 2019 so you won't benefit from the 2021 updates.


There is also the new integrated Aeolus RSL VR-C bar/stem along with the option of the new Aeolus RSL 37 wheelset, both of which were launched with the new Emonda SLR. The main changes come in the form of a new carbon that was also developed for the 2021 Emonda, along with a welcome return to a threaded bottom bracket.

Bontrager Aeolus_RSL_37_4
All-new Émonda gets aero to become "Trek’s fastest climbing bike ever"

OCLV 800

2021 Trek Emonda SLR OCLV 800 - 1

We got all the juicy details about Trek’s new OCLV 800 carbon fibre during the Emonda launch. The new carbon layup was specifically designed to get the Emonda SLR frameset under 700g and the weight savings have apparently been passed on to the 2021 Madone with Trek claiming a frameset weight saving of 80g. This all comes, Trek claims, “with no aerodynamic penalty.”

Trek says that “from a fibre-type perspective OCLV 800 is 30% stronger than the material that we've been using in OCLV 700.” 

That is pretty much all we know about OCLV 800. Trek is keeping its cards close, though it does say that the material has been in development for two years.

Interestingly, though, Trek said that the Emonda only used the new carbon “in specific areas of the frame that benefit most from having that quality of improved strength” and where it was able to save weight too. We suspect that this is also the case with the 2021 Madone.

The claimed 450g weight saving isn’t all down to the new carbon. Trek says that this figure is reached when you spec the bike on its Project One custom programme using the new wheels, new bar, the lightest paint and other component choices.

T47 BB

We’re finally getting back to threaded bottom brackets with Trek saying that the system offers “the ultimate in serviceability".

We'd agree and T47, first introduced by Chris King and Argonaut Cycles a few years ago, offers many of the benefits of a pressfit system with the simplicity of a threaded system for the end user.

Firstly, the T47 system screws into the hub shell. This makes installation and replacing the system far easier as there is only one tool involved. To try to keep the performance benefits of a pressfit system, the T47 system sits the bearings as far apart as possible in the hub shell, allowing Trek to design a huge bottom bracket shell for increased stiffness. 

It also gives the bearings a wide stance which, in theory, should decrease bearing wear. At the launch of the Emonda, Trek said that we could expect to see T47 being used more widely on its road range so it’s good to see this become a reality.

Pretty paint

2021 Trek Madone - Gold Leaf

I mentioned Project One above and Trek’s popular custom builder programme continues with three new Icon paint schemes and more parts options. The Icon designs include the Sweet Gold Leaf and other designs that we saw launched with the Emonda. 

2021 Trek Madone - Abstract Paint

There is also the KOM series that allows you full control of the colours while Project One Ultimate gives you even more freedom, allowing you to design your own graphics, pick non-standard colours and spec the bike however you want.

Head over to the Project One site to play. What else are you doing on a Thursday afternoon anyway?

New Wheel Options

Bontrager Aeolus_RSL_37_2

The redesigned Bontrager Aeolus RSL 37 wheels are now also available on the Madone with the Team Edition Madone SLR models getting the new wheels as standard.

Bontrager Aeolus_RSL_37_8

Mat took a proper look at the new wheels here but the main points are a 37mm deep, 28mm wide carbon rim with a 21mm internal width on a hub featuring DT Swiss 240 internals and the new Ratchet EXP system. They’re tubeless-ready and Trek claims a wheelset weight of just 1,325g, dropping 55g from the previous model. The Aeolus RSL 37 is also, Trek claims, 17% faster than the existing 28mm deep Bontrager Aeolus XXX 2, and nearly matches the 47mm-deep Aeolus XXX 4 for speed.

As-you-were geometry

Trek hasn’t changed the geometry on the new Madone, sticking with the H1.5 fit that they introduced with the last Madone and which has also been adopted by the 2021 Emonda.

Check out David Arthur's review of the 2019 Trek Madone SLR 9 Disc for all the geometry details

Like the look of the Madone? Trek hasn’t given us any specific details of when the bikes will be available in stores. But we do have some prices for you.

The new Madone SLR9 Disc eTap comes in at £11,950 with the SLR6 Disc at a slightly more accessible (it's all relative!) £6,250. The SLR Disc frameset costs £4,210. Here’s a full price list of the standard builds.

2021 Trek Madone - SLR6 Disc
  • Madone SLR 6 Disc - Ultegra R8020 -  Aeolus Pro 5 - £6,250.00
  • Madone SLR 7 Disc  - Ultegra R8750 Di2 -  Aeolus Pro 5 - £7,500.00
  • Madone SLR 7 Disc eTap - Force eTap AXS - Aeolus Pro 5 - £8,200.00
  • Madone SLR 9 Disc - Dura-Ace R9170 Di2 - Aeolus XXX 6 - £11,350.00
  • Madone SLR 9 Disc eTap - Red eTap AXS - Aeolus XXX 6 - £11,950.00
  • Madone SLR Disc Frameset - £4,210.00

All Sram equipped bikes come with a Quarq power meter as standard. Thankfully, this is now the case with the Shimano equipped bikes too after the 2019 models missed out. Given the £1,350 price hike on the Dura-Ace R9170 model, the addition of the Shimano power meter chainset is a welcome addition.

Add new comment


rizaulait2 | 4 years ago

Very nice bike. But I find it ridiculous to focus the  marketing talk on the weight savings, and on the other hand to not give a single weight for a complete build. If it was really that light, they would probably give a weight...

TotalLoss | 4 years ago

I think the logo should be bigger 👀

richliv | 4 years ago

Bit bloody cheeky to charge those prices and only put the T47 BB in the SLR range. I wouldn't buy until it's in the SL range at least, I have two Treks with BB90 & they are by far the most frequently replaced component even allowing for some recent workrounds. Otherwise, looks awesome.

sammutd88 | 4 years ago

All these frame designaters like OCLV 600/700/800 (and Trek aren't the only guilty ones!) mean absolutely nothing without knowing what carbon fibre is used. Is it standard T600/T700/T800 or is it the flash T1100 stuff Pinarello use in the Dogma? For the cash, you'd hope it's T1100 in OCLV 800. 

Joe Totale | 4 years ago

Given that this 80g saving from using different carbon is headline news, surely it's only fair to also state that moving to a T47 bottom bracket will add all that saved weight back?

It's weight well spent though, BB90 is the worst of the BB standards.

Blackthorne replied to Joe Totale | 4 years ago
1 like

The logo alone would save you 125g of paint. It really should be bigger though, because everyone within a ten mile radius must know what you're riding. 

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