Deda Elementi M35 Trentacinque handlebar and stem with 35mm oversized clamp

Back in the day, we all rocked 25.4mm diameter handlebars and stems and put up with some flex. Then came OS 31.8 and a boatload of stiffness. Now, Deda Elementi has upped the game with their new M35 handlebar and Trentacinque stem.

Boasting the largest ever handlebar diameter of 35mm, the girth spreads all the way across the flats of the drop-style road handlebar, not just at the clamp area. Weighing in at about 221g for the carbon handlebar, it’s available in 42/44/46 widths with a 130mm drop and 75mm reach.

The 3D forged 2014 alloy stem is available in 90/100/110/120/130 lengths and weighs in about 125g for the 100mm.

Why go so big? Read more for the story…

Deda Elementi M35 Trentacinque handlebar and stem with 35mm oversized clamp

Both the bar and stem feature varying wall thicknesses. The larger diameter handlebar not only increases rigidity, but Deda says it dramatically reduces vibrations and hand fatigue. In fact, it’s designed to be run without bar tape on the flats, with markings indicating where to start the tape. Internal cable runs with tidy ports keep it clean.

Deda Elementi M35 Trentacinque handlebar and stem with 35mm oversized clamp

The stem has an 8º rise/drop. Together, Deda says they “give a different and entirely new feel while riding.” They claim the increased rigidity better transfers power to the wheels, losing less to component flex.

Deda Elementi M35 Trentacinque handlebar and stem with 35mm oversized clamp

The components come in painted red or white or a matte black stem with gloss carbon fiber handlebar.

Deda Elementi M35 Trentacinque handlebar and stem with 35mm oversized clamp


  1. How will larder diameter absorb harsh roads better? Larger diameter bars with more rigidity, that’s the definition of increased harshness much like larger diameter Aluminum bike frames, how larger diameter bars are going to reduce vibrations is beyond me.

    31.8 bars are much more stiffer than 25.4 so 35 much be well even stiffer

    If they added some type of damping material I’d believe they would dampen SOME road vibrations but not all of them.

  2. meh… I’ll hold off on these.
    I’ll wait for the 45mm diameter bars and a 65mm BB spindle to be released. Maybe a 1.5″ to 3.5″ tapered steer tube too, with a 50.9mm seatpost…

    …Give it about 9 months and we’ll be there.

  3. New riding experience, or a means to try to capture bar and stem purchases?

    Who were the manufacturers who made 31.7 bars and stems, when all others specced 31.8?

    I’ll give you a clue – it’s an anagram of Dade…

    • I think they’re all manufacturing 1.25 in clamps which is 31.75 mm, so most rounded up, while others like Deda rounded down. They’re compatible with each other.

  4. “wait, any of these stems will work with any of these bars? And they’re not being fooled by the ‘31.7mm’ label? Something must be done about this….”

  5. 31.7 and 31.8 are the same. The “standard” is actually 1.25″. When converting to mm some companies round up to 31.8 and some round down to 31.7. All are compatible.

  6. @Atgani is right on the money. ^^^

    Last thing we need is a new “standard”.

    Deda should focus more on time on putting efficiencies into their manufacturing rather than spending the money to market something that is unneeded. (that actually goes for 90% of the bike industry)

  7. Silly. Going to 31.8 mm made stems heavier. I don’t pedal my bike through my handlebars: handlebar flex simply isn’t an issue for me. This is solving a problem which doesn’t exist.

  8. if your not strong enough or doing aggressive enough riding to flex bars/stem then this product is not for you.

    for those of us that now have extremely efficient wheels/drivetrain are feeling more road in their ride. bigger tubes “do” dampen vibrations. look at frames, they are doing the same thing.

    stem/bars are a great place to comfy up your ride, especially if they are stiffer for sprints and standing uphill super efforts. weight can be held at bay by varying thickness. of course the aero properties go out the window.

  9. So this system makes sense for maybe 5% of the pro peloton. That then translates to what, .02% of actual riders? Simple to market this, difficult to actual prove an improvement to performance. Easy to tell that its stupid.

  10. At least Zipp, Enve, et al go to some effort (wind tunnel test data) to show that their improvements do yield benefits. When it comes to the stiffness orgy…..well, things become a bit less concrete, especially when you consider the gaping hole in the human knowledge base: you know, that hole that’s supposed to be filled with all the data that shows how stiffer bars, frames, steerer spacers, and chainring bolts offer improved performance. Now, the magazines are in on the orgy doing all manner of testing to show you that Cervek’s new frame is truly the stiffest at 3 out of 5 measuring points. Of course no one knows if any of that data amounts to anything.

    With that in mind, I’m putting the finishing touches on a frame design that minimizes the negative effects and maximizes the constructive effects of radiation pressure, no matter the resultant Poynting vector. I’m taking deposits now.

    Alas, it’s been discovered….well, engineers and physicists have known this for a long time….that increasing tube diameter has no inherent ability to damp vibrations. Increasing mass does. Increasing hysteresis does. Increasing tube size……doesn’t. In fact all it does–all else being equal–is increase the natural frequency of the component by making it stiffer.

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