We’ve seen some great ultralight carbon tech from custom cockpit maker Darimo over the last year. But now they’ve taken it to new, ever lighter extremes with a wild new seatpost head that clamps your lightweight saddle with a pair of rope loops made of the world’s strongest fiber, Dyneema – and of course sheds grams in the process…

Darimo T1 Loop, Dyneema fiber rope saddle clamp

The new seatpost clamp is named the Loop and uses two precisely made, 100% Dyneema fiber loops to tension the saddle rails atop Darimo’s already crazy light T1 carbon seatpost. Compared to their already carbon standard cradle, the new Loop clamp sheds another 8g, meaning their 400mm long T1 Loop seatpost now comes in at or below 90g.

Darimo T1 Loop, dyneema fiber rope saddle clamp on ultralight lightweight custom carbon seatpost

photos c. Darimo

While weight savings is great (and will satisfy the nerdiest weight weenie), the new ultra-high molecular weight polyethylene (yeah, that’s what Dyneema is) loop is said to be ‘totally indestructible’. by eliminating the clamp edges of the ‘regular’ carbon cradle, this one might be even better served for rougher, off-road use.

Darimo T1 Loop, dyneema fiber rope saddle clamp on ultralight lightweight custom carbon seatpost

The extra benefit, anyone who already has a Darimo T1 seatpost can retrofit it with the new Loop clamp.

Darimo Dyneema Loop details & actual weights

Darimo T1 Loop, dyneema fiber rope saddle clamp on ultralight lightweight custom carbon seatpost

Compared to the 18.7g carbon seat cradle & aluminum barrels of the standard clamp, the new 10.4g Dyneema guts & barrels shed a few more precious grams (both designs share the same titanium bolts, which are not shown on the scale). On such a light overall design, that adds up to an 8% total seatpost weight savings!

Darimo T1 Loop, dyneema fiber rope saddle clamp on ultralight lightweight custom carbon seatpost

Now a complete T1 Loop 31.6mm diameter, 400mm long UD finish post weighs just under 91g with the new clamping setup.

Darimo T1 Loop, dyneema fiber rope saddle clamp on ultralight lightweight custom carbon seatpost

And of course, Darimo still makes these to order in the workshop in Spain. So they can probably even lay up a lighter seatpost, or certainly do most any length or diameter your next super bike project needs. The price of the new T1 Loop is just 300€ (not even 10% more than the regular T1, and still cheaper than the setback T2.) Reach out to Darimo directly if you want to upgrade your current post.

Darimo.eu

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21 Comments
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Klaster_1
Klaster_1
3 years ago

That’s neat and I want to order a couple of new clamp assemblies, but doesn’t Dyneema creep with temperature? It’s a major discussion point about Berd spokes.

Tom
Tom
3 years ago
Reply to  Klaster_1

I’m guessing this seat post is the definition of “bleeding edge”

rbg
rbg
3 years ago
Reply to  Tom

‘fraid knot….

Fishing Line Engineer
Fishing Line Engineer
3 years ago
Reply to  Klaster_1

Came here to say the same thing….all UHMWPE creeps under constant stress. You’d just need to keep checking and adjusting like SRAM products.

Volsung
Volsung
3 years ago
Reply to  Klaster_1

Could you explain “creep” a bit? Berd is based in Minneapolis so one would think they’d plan around the cold.

Klaster_1
Klaster_1
3 years ago
Reply to  Volsung

Check out this illustration. Unless the material is on par with DM20, you’ll have to adjust tension constantly, until barrels hit the axle.

briannystrom
briannystrom
3 years ago
Reply to  Volsung

Creep is a process by which a material stretches permanently. This is a well-known issue with Dyneema (a.k.a. “Spectra” in the US). Dyneema is also very heat sensitive (heat accelerates creep), so don’t leave your bike in the car on a hot, sunny day, unless you want your saddle to come off during the next ride. 🙂

pinko
pinko
3 years ago

I trust a new lightweight component maker after I see their stuff on World Tour bikes and XCO world cup… Over the years I have only seen Italian stuff on these bikes….

Speed565
Speed565
3 years ago
Reply to  pinko

When it comes to XCO and exotic lightweight components there are more german and spanish.

Justin claas
Justin claas
3 years ago

Is there a dropper version?

Pete
Pete
3 years ago

Ya might wannna shorten those bolts and save a few more, eh?

mud+rock
mud+rock
3 years ago

Really, 8.3 grams? Good candidate for Tyler’s next project bike.

Toffee
Toffee
3 years ago

Looking forward to seeing the matching stem

Launchpad McQuack
Launchpad McQuack
3 years ago
Reply to  Toffee

lol

mecanico do paladar
mecanico do paladar
3 years ago

Using this new system for a while.
No creaking!
No movements from loosing torque clamp!
Holds the saddle with confidence using a very low torque. So you get the same (best) result with less weight and less risk of cracking a rail by overtorque on the yokes.

By the way, i am “almost” sure that the Speedneedle with some dry mud drops underneath is mine!
Godspeed DARIMO!

Joe Englert
Joe Englert
1 year ago

wondering if you can move the saddle all the way forward as you can with a traditional seatpost…i have a short torso so i move my saddle as close to the bars as possible

phlizz
3 years ago

My belief in human craftsmanship and ingenuity went up 10%
My belief in human reason went down 5%

phlizz
3 years ago

My point is… on impact my saddle, given nothing brakes, will move horizontally and angular and stay there pretty reliable till I stop and move it in the right position. A rope is only a reliable part while placed and under tension… as soon as contact point or tension is lost it will turn into a woven structure that can easily and unpredictably move. I don’t want to fiddle with a muddy rope in the woods on a cold day just before sunset… even if saved me 70g.

B-Doug
B-Doug
3 years ago

At first glance it doesn’t exactly inspire confidence. And using wood dowels for rail place holders lends it a Robinson Crusoe kind of aesthetic. But pretty inventive, and if it works well kudos.

Bikefx
5 months ago

? Whats keeping saddle from sliding fwd orback?? Does not seemlike much! Justsheer rope friction??

Jason D West
Jason D West
22 days ago

Some highend suture is made from that stuff. Can’t break it but it can cut fairly easily.