For those that live for speed, dependable bottom bracket performance, and love a good racing red color scheme — boy, do we have news for you. Trek announced a few updates to its world-class race machine, the Madone SL. Though the geometry, tube shapes, and general frame remain the same, one key feature receives a much-appreciated update.

Trek Madone SL 7 SRAM Force drive train

Trek seems to be swapping its long-held BB90 standard to a more widely appreciated BB-T47 bottom bracket. The update has already happened for the Domane, Boone, Crocket, Emonda, even the Madone SLR. Trek seems to be keeping with the Pressfit 92 MTB for its off-road line and have had success with less creaking and overall bearing issues.

Trek Madone SL 7 side view

Why the change?

The BB90 standard is a bottom bracket standard that the company has used for quite some time and, at its introduction, was quite inventive. The BB90 utilized every millimeter of the bottom bracket width and it sculpted directly into the frame. The idea was for a stiffer and more responsive bike overall.

The problem was the BB90 bearings that went into the frame weren’t a press-fit, more of a “push-in by hand.” The bearings are easy to install, and if they stay silent, it’s a fantastic design. Unfortunately, these bearings would get a tiny bit of wiggle room, and the creaking would set in. The only remedy was/is a bit of Loctite and some patience. The BB90 standard is also somewhat limiting for crank spindles, not allowing for the use of 30mm spindles.

The BB-T47 (introduced in 2015 by Chris King) is similar in size but offers better compatibility with larger spindle cranks and utilizes a threaded system for loading. The idea is a super-sized version of the standard BSA threaded bottom bracket that is user-friendly and easily serviceable. Most importantly, the frame and cup interface is far less susceptible to creaking.

Trek Madone SL 6 drive train Ultegra

What models receive the update?

The Trek Madone SLs that will come with the new BB-T47 bottom brackets are the SL6 – with mechanical Ultegera and the SL7, which arrives with SRAM Force eTap AXS.

Trek Madone SL 7 IsoSpeed

The Trek Madone SL6 and SL7 models come in Treks 500 Series OCLV carbon, same as the 2021 models — saving the OCLV 800 for the Madone SLR.

2022 Trek Madone SL models and pricing

Trek Madone SL 6 side view

Madone SL6

The updated Madone SL6 comes with a full Shimano Ultegra groupset and Bontrager Carbon Aeolus Comp tubeless wheels. It features the same geometry and IsoSpeed controls of the 2021 model, adding the new BB-T47 and Trek’s new Viper Red color scheme.

  • Price: $4700
  • Sizes: 50, 52, 54, 56, 58, 60, 62

Trek Madone SL 7 full bike

Madone SL7

The Madone SL7 comes eTap ready with a full SRAM Force eTap groupset — power meter included. The Deep Dark Blue bike spins on Bontrager’s new Aeolus Pro 51 tubeless wheels and Bontrager R3 tires. Like the SL6, the Madone SL7 comes with the same IsoSpeed trappings and Kammtail Virtual Foil tech as the 2021 models.

  • Price: $7000
  • Sizes: 50, 52, 54, 56, 58, 60, 62

Trek Madone SL 7 head on

Availability

The updated Trek Madone models are set to ship ASAP. We suggest checking the Trek Bikes website for real-time availability or contact your local Trek shop for updates.

19 comments

    • None Given on

      What again was the gain? Weight loss for some as many power meters do not play well with the BB region….still cant figure out what was fixed (some will say frame stiffness and then offset that with a lower PSI tire or some nice opioids for their lower lumbar pain).

      Reply
      • gregoryvanthomas on

        Threads can take up a certain amount of tolerance. Press fits require much greater precision.
        The bottom bracket maker can specify the level of interference fit they want between bearing and cup, and when it’s screwed into the frame, that won’t change. Any press fit system with bearings in the frame gives the bearing some compression with the installation into the frame, unless the fit is nearly a slip fit and then requires thread locker. The systems where the bearings are outboard try to cam out and are therefore much more prone to creaks. So-called “thread fit” bottom brackets rarely solve anything and introduce their own issues.
        T47 is a decent way to do it. Personally, I wish they went with a much larger, much more coarse thread so that the threads could be cut (or molded) straight into the carbon.

        Reply
        • Anders on

          To me, using threaded bottom brackets is the bike industry being lazy, not fixing the tolerance and quality assurance problem they have in their otherwise rather expensive frames. All other industries do press fit, it’s the standard way to fit bearings. Press fit done right would work great.

          For amateur mechanics sure threaded bottom brackets are easier to work with. Bikes have become much more advanced with hydraulics and internal routing etc, if you want a simple bike to work with you shouldn’t have modern high end bike at all, except for wireless derailleurs of course :-).

          Reply
  1. Brian B on

    Just get a Hambini bottom bracket and be done with it. I find it funny people think that carbon can be held to the same tolerances as something you could machine perfectly round, let metal of some sort.

    Reply
    • PoorInRichfield on

      lol! This was going to be my comment as well… I.e., ow on earth would the bikes be “ready to ship” when no one can get a bike right now.

      Reply
  2. None Given on

    Oh, and as for King…if the man had not made such a perfect BB and Headset (granted, HS somewhat a copy of a Mavic)…well, they would not last -forever- and we would not keep them forever 🙂

    Now, some of my other BB’s, they just go to pot after a few months and I have to buy new ;-I

    Reply
  3. alloycowboy on

    This is a significant improvement over press fit bottom brackets that have to be pressed in and out which is just a pain in the derrière. The new colors are great, but Trek still needs to reduce their font size and come up with an easy recongizabe design language like Ferrari.

    Reply
    • Anders on

      Maybe it’s just me, but I kind of like big logos on race bikes, it makes them look more like race bikes. Just like race cars have big logos and text all over.

      Reply
  4. Dinger on

    BSA is design and spec limiting. Can’t use larger BB spindles, loss of bb shell width for chain stay spacing, downtube width.

    Reply
      • Anders on

        BSA with 30 mm spindle is a compromise, as you need a special type of bearing which wears out fast due to extra small balls. So if you want 30 mm spindle, T47 is certainly better.

        Reply
      • Yup on

        @Seraph Trek is so far in bed with SRAM these days that they can no longer have bottom brackets that are frankly a compromise with almost-30mm DUB.

        Reply

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