Stiffest Frame

If all you want is stiffness, you need to research more. Are you looking at price, comfort, aerodynamics, etc etc. Also where do you want the stiffness?

Stiff bottom bracket frames that spring to mind: Cervelo R3, BMC SL01 (oh yeah), colnago ARTE. These frames range enormously in price, but not much in stiffness. The BMC SL01 is exceptionally stiff, the colnago arte is a bit stiffer, the cervelo R3 isn't as stiff.

CAAD8s are pretty stiff and reasonably priced.

I've heard CAAD 4,5, are stiffer than a CAAD8

other to choose from are,

Cube, Boreas, E5 s-works/Tarmac,

There are lots of stiff frames, a LOT depends on what you are looking for and what you are willing to pay. A decent place to get a better idea of what are stiff frames is through what is considered probably amongst the toughest testing around, by EFBe in Germany. There latest list of published results is here... with Cannondale, Scott, Ktm and Isaac coming out very well. 🙂

But unless you have monster power, or really desire to have your back kill you after long rides, why is that you are looking for the stiffest frame around? 🙄😕

there are quite a lot of reviews here, though some a bit old.

http://www.roadbikereview.com/cat/latest-bikes/road-bike/PLS_5668_670crx.aspx

Powerful Pete said:

There are lots of stiff frames, a LOT depends on what you are looking for and what you are willing to pay. A decent place to get a better idea of what are stiff frames is through what is considered probably amongst the toughest testing around, by EFBe in Germany. There latest list of published results is here... with Cannondale, Scott, Ktm and Isaac coming out very well. 🙂

The EFBe ratings are more about frame integrity/strength - stiffness is different. If the OP can translate German I recommend that they look at the "TOUR Magazin" archives as they've been measuring frame stiffness for quite some time. I also recommend that they look at the March 27, 2006 Velo News article (not on the web as I recall) relating to frame stiffness testing and how there are a number of different ways to measure frame stiffness (for the entire frame, bottom bracket area only, rear stays, etc....). From the tests they've had done, and Specialized's testing also verifies, the Cervelo R3 is the stiffest frame over all and at the bottom bracket. Specialized's testing also shows the R3 to be rather compliant.

DK

Powerful Pete said:

But unless you have monster power, or really desire to have your back kill you after long rides, why is that you are looking for the stiffest frame around? 🙄😕

+1

Which frame gives the most efficient transfer of the riders energy to the wheel and minimises the fatigue of the rider?

If the question was about track bike frames, the issue would largely be stiffness as weight and confort are less of a consideration.

here' some more EFBe stuff

http://www.efbe.de/testergebnisse/rennwiege/enindex.php

I've been boring a lot of people with this lately: I figure that fork flex is often overlooked when it comes to out of the saddle rigidity. I've virtually transformed bikes by changing forks. For eg, the difference in flex between a full-carbon Mizuno fork and a stiff Columbus Link is amazing -- it's like riding a different bike. I recently bought the cheapest BMC frame (Streetfire: $720 US, what a bargain!), and I found the Easton EC70 to be a bit flexy. I tried a Specialized Fact fork (full-carbon), which was very good, but I ended up putting my Columbus Link on it. But, the Link was too stiff for my Cinelli Proxima