frame strength

[shaun]

Yonex has 2 different weights for almost all their racquets....their weights being 2u and 3u. Obviously, the 3u versions are lighter...but how exactly do they make the 3u versions lighter than the 2u? Is it that they take away some material from the frame?
Because I just found out that my ti7 is covered under warrenty....and i'm hoping that 2u is a lot more durable than a 3u....because i intend to string at the same tension next time(23x25) but except with bg70. So as long as 2u is more durable, i'll be happy ^_^ 23x25 wont be stressing a 2u frame too much would it?

[cooler]

2u would be better but 23x25 is still outside yonex's warranty unless u got a good dealer behind ya.

[Howard]

well it's like this.2u more graphite in it and in 3u the take out graphite an other words makes it thinner to make it more light.