Nello stesso periodo in Australia.....
[url]http://weightweenies.starbike.com/forum/viewtopic.php?f=3&t=33208[/URL]
Copio e incollo il thread....chi avrà ragione?
I think steel can still compete. The newest issue of a magazine here in Australia called "Ride: Cycling Review" tested a Pegoretti Marcelo frame made from Colombus Spirit steel. The tester was raving on about how stiff the frame was. I was skeptical because of all the marketing stuff I've heard about steel being smooth but not uber stiff, alloy being stiff and harsh and carbon being stiff but forgiving.
But they also do a test on a jig. They test the stiffness of the bottom bracket junction, the head tube and top tube junction and the seat tube and tob tube junction via a 40kg weight on the crank. Results for these were 0.26mm for bb, 0.13mm for ht/tt and 0.11mm for the st/tt junction. To put it into perspective, they also tested a Look 585 Ultra, which recieved the following results: 0.26mm for the bb, 0.25mm for the ht/tt and 0.29mm for the st/tt. In the review of the Look, they state that Look's purpose of the 585 Ultra (compared to the original 585 they tested last year) is "stiffness above all".
nelle prove al banco di telai e e motori di motociclette i numeri,compreso il peso che qui non vedo,sono indicativi del nulla,altrimenti le Ducati bicilindriche avrebbero vinto zero al confronto con le quattro cilindri giapponesi molto piu' potenti e leggiere.
figuriamoci se parluamo di test di telai da bdc dove la potenza del motore e il prso complessivo bici +motore(ciclista) e' variabbile.