Frame req? (Aero, dropped SS, high stack, short reach)

[hoot]

 Has press fit come a long way ? I had a couple Super Six Evos in 2012 and 2014 and the BB sucked bad. They were fine new but needed attention after only a couple years. (creaking) Also - T47 has lots of tool interface on a road BB and even on wider a 86mm bb are fine if careful. Just don't use shit tools/BBs. The only drawback is they don't look that nice.
 Now that I think about it I am sure the bb on my C50 and Master are original and they are 20 years old LOL.

Pressfit is very good as long as the BB shell is made within the correct tolerances (dimensions, roundness, alignment) and the Shimano pressfit BB is a nice design. I think most problems in the past were due to poor manufacturing. Recent frames have tended to be better (and I'm sure this one would be within tolerance!). When it's done well you end up with a system that's stiff due to the bearing spacing, and lighter than T47.

[jfcb]

Who likes to have a handlebar like this with the frame Peter proposed ?
Drop ca. 100mm and with a rather high flare.
The concept is from Canyon (at least that is where I came across it) but with adjustable width, what I do not like due to the possible risk and instability.
https://www.canyon.com/de-de/fahrradzubehoer/fahrradteile/ersatzteile-verschleiss/canyon-ersatzteile/canyon-pace-aero-drops/10014134.html
But this handlebar is follwowing the same idea as the frame to have something with a different geometry instead of having a lot of offerings with identical geometry,

Love the geometry of those handlebars, but indeed I'd rather have them as a one piece / one size than a modular handlebar to avoid any safety issues. Have you seen already similar handlebars appear on the asian market?

[janp]

I found this:

http://www.adapt-bikes.com/Products-detail?product_id=103##

I asked Adapt if this is compatible with the canyon drops or if they can provide a quote to me but got no responce.
Another problem (exept from the joints) with the canyon bars is that it looks like if the stem-part is propritary:

https://www.canyon.com/de-de/fahrradzubehoer/fahrradteile/ersatzteile-verschleiss/canyon-ersatzteile/canyon-pace-t-bar/9102266.html

and will only work with special or modified forks.
So far I only found not integrated handlebars (to be used with a normal stem) with ca. 100mm drop

[Daviddavieboy]

Pressfit is very good as long as the BB shell is made within the correct tolerances (dimensions, roundness, alignment) and the Shimano pressfit BB is a nice design. I think most problems in the past were due to poor manufacturing. Recent frames have tended to be better (and I'm sure this one would be within tolerance!). When it's done well you end up with a system that's stiff due to the bearing spacing, and lighter than T47.

 That's good to hear. My second SS frame I ended up getting praxis thread together bb, installing it and selling the frame.

[Icyseanfitz]

Interested in seeing how this new frame turns out Peter

[Lotnik]

OK. So here is our goal to do this new frame, same standard as Faxxxx on headtube and bottom bracket testing.
One piece mold and latex molding
High stack, short reach, more aggressive geometry than Factor but less than Pina X
700*35C max tire clearance, UDH, T47 85.5mm bottom bracket, both top and down 52mm headtube
aero seat post but with two types seat clamps for either 7*7 or 7*9 saddle rails
dropped seat stay, aero design
Size 54cm weight would be around 895+/-30g after painted and with front and rear derailleur hanger mounted.
Here is my only question now: which position do you like the battery located ? Seat post or low side of bottom bracket ?

I would add to this list konger than usual headtube. Then we can have slamed stems. Battery for me wilk be better in the seat post.

[casper.f]

So something like this:
https://www.instagram.com/p/DDXZQarJysb/

But a bit more normal looking and handling?
Is this the goal of this thread or am i interpreting this completly wrong?

[PeterXu]

This would be our newest frameset and handlebar. First size would be available in April.

[sync1]

Is seems very good!
Any draf/final geometry chart?

[poyo]

Would also be interested

[neobiker]

This would be our newest frameset and handlebar. First size would be available in April.

It is beautiful. I hope you can keep it affordable.

[BalticSea]

A round seat post is more compliant as well. Also, there has been wind tunnel testing that shows a round seat post has little if any affect due to disturbing the trailing turbulence behind the rider.

 As far as tires it has already been shown the trend is getting bigger. Some are already using 35mm racing on the cobbles. (ie 2024 Paris-Roubaix). Paired with the right wheels 30-32 seems the fastest on most roads though.

That would come down to seatpost itself (carbon layup, wall thickness), considering that circle is one of the stiffer shapes.

As for bottom bracket standard... Guys, please let BB86 rest in the trash bin where it rightfully belongs, nobody likes running tiny bearings with VASTLY superior DUB cranks.

[hoot]

That would come down to seatpost itself (carbon layup, wall thickness), considering that circle is one of the stiffer shapes.

As for bottom bracket standard... Guys, please let BB86 rest in the trash bin where it rightfully belongs, nobody likes running tiny bearings with VASTLY superior DUB cranks.

Ok... But T47 85.5 doesn't do what you're hoping for then

[Daviddavieboy]

considering that circle is one of the stiffer shapes.

 Compared to what other shape tube ?

[BalticSea]

Compared to what other shape tube ?

Peak Torque has done a video few years ago on compliance of carbon tubes, he also did a simulation of load bearing of few most popular seatpost shapes:
https://youtu.be/C8eg4O3OrvM?si=oRzFzLxhokAimy3J&t=831

27.2mm carbon seatpost had about the same seatpost as D shape post or minimized aero seatposts (he used Giant TCR's shape, but Tarmac, Specialissima and some other bikes have very similar shaped posts). Deep aero seatpost was the most stiff, but it also had the biggest surface area by far considering it had same wall thickness as other tubes (that might not always be the case, i.e. my Winnow aero bike's seatpost is thicker at the front and back, but sides are quite a bit thinner).

In the very same video he also brings up the point about chassis for cars and roll cages – round tubes are used for making them because round tubes are probably the best choice for handling complex loads