Mario Jr. wrote:
I am dead serious. I have probably owned more bikes than most here, I am in the industry and hence has some access to a bit of inside knowledge. I have discussed this with various designers and engineers. As un-scientific as it might seem, this "test" most often reflects very well the stiffness tests made by various magazines and of course manufacturers. Of course, you can't feel if a given frame has 70 or 75 nm/deg. "headtube" stiffness, but it's certainly a good measure of if a frame is stiff or not. If you think about it, it makes sense. What you are doing is essential what the lab tests are doing, namely trying to flex the front in relation to the rear. You have to yank hard, though. If this triggers a shimmy, you might either have other problems or the frames is very, very flexible. I have had two frames that flexible, personally.
As I said, it sounds like your frame has a problem.
Hi, thank You for Your comment. I do have the same experiences and opinion.
Unfortunatelly my cervelo dealer is 250km from my house, so I still did not have a chance to test another R5
Meanwhile, I rode the Dogma again today, and I also rode a Lapiere Xelius 900.
Both bikes has significantly "stiffer" front end. Again, the Dogma rails like a tank, this is what I expected from upgrading from my old R3 (2007) to a R5 VWD.
The R5 of mine really feels like a noodle in a direct comparisson with the Dogma
The reason why I am writting is to ask how to prove to Cervelo, that there is something wrong?
How are they going to investigate it? Maybe after months of waiting they tell me, sorry, the frame is OK and all of my season will be lost
And maybe the frame is really OK and Dogma is just so much better in front end stiffness....just because of the added 500 grams
Thank You for advices.