It can only be strung up to 18lbs if i'm not wrong. But not very high, Taufik strung his racket at 31lbs. Yudhi went and asked the stringer
In fact all the rackets were strung at 31! I think it is the standard tension for the professional players.
Wow ! Thing my racket will last 1-2 mths at the most! And with a mishit here and there, probably 2 weeks or even 2 days !!
I just can't imagine how can they strung at 31lbs. I'll have to use all my strength to hit the shuttle from baseline to baseline...