Can I string outside of the recommended tension of 24lbs, 28lbs, above 30lbs or anything in between? What is "recommendation" anyway? All modern badminton racquets these days are recommended to be strung at certain string tensions by their manufacturers. These tension ranges can be from 18lbs to 22lbs or 18lbs to 24lbs or 20lbs to 26lbs etc. Some racquets are simply marked as "warranted maximum tension of 36lbs". First of all, these recommended tension are largely unrelated to the playability of the racquet. By recommendation, the actual meaning is expressively: "This manufacturer recommends the stringer to do this racquet at [for e.g. 18lbs to 24lbs], just in case you [the stringer] break it and provided that you use our recommended string pattern, then you are liable to claim for warranty replacement. Any higher than our maximum and you break it, then it is your own problem as you clearly do not have the technique or equipment, yet you do it (why should we have mercy on you [the stringer]?)." In other words, the recommended string tension especially the maximum is more or less a safety range for inexperienced stringers to apply to as the stringing process itself applies one of the heaviest stresses to the badminton racquet compared to normal play. The other heaviest stress is during one string breakage and your racquet frame is distorted from the uneveness in the string bed. On the other hand, a lousy stringer IS ABLE TO BREAK your racquet with a mistake during stringing at even the lowly tensions of 21lbs or way below the maximum recommended. Once you are talking about experienced professional stringers such as Alan Kakinami (who is a member of this forum), the recommended tension ranges do not apply any longer. An experienced stringer has the technique to string your racquet at very high tensions as they are able to minimise the stresses applied to the badminton racquet frame during stringing more efficiently than your local stringer (especially that one who insists that you ask him to string below 24lbs because "it is what Yonex recommends"). A lousy stringer is also able to break your racquet from multiple stringing if he makes a minor mistake everytime he strings your racquet as the micro structural damage will compound after time and on the final stringing your racquet will finally give up and break. Badminton racquets do not heal themselves unlike human bones over time. Technically speaking, ALL graphite racquets of today EVEN THE COUNTERFEIT ONES are able to be strung above 30lbs in tension. This depends entirely on the technique of the stringer who is doing the racquet at the 30+lbs tension. So what happens if I play at high tensions? You need good technique to play at higher tensions. "High tension" is a subjective term and one player's normal tension could mean high tension for another player. There is no definable high tension range which can be applied to everyone. You simply can not say "I know this professonal player who uses so so tension and because of that I must string lower". It is almost akin to saying "my parents earn this much of money per month, so I should not earn more than them with my new job". Seriously, enough said. But when you play with the racquet and if only if you mishit the shuttle (hitting the frame etc.), the structural integrity of the frame will be subjected to the stress test and you will know if the racquet is manufactured good enough to withstand the stress and resist breaking. This is also what separates the good branded racquets from the cheap branded racquets. Although if you don't mishit AT ALL, the racquet will NOT BREAK AT ALL. A very bad mishit at a bad angle CAN STILL CRACK a racquet strung at low tensions (racquets strung at higher tensions will break), nonetheless. And don't EVEN THINK ABOUT CLASHING your racquet. Even if you are strung at 18lbs within your "maximum warranted tension" of 24lbs, a clash CAN STILL KILL YOUR RACQUET if you are unlucky and NO RACQUET MANUFACTURER will replace your racquet for you even if it is still within the warranty period. It is easy to tell if it a racquet broke from a clash so Yonex or most manufacturers WILL NOT HAVE MERCY on you. You should always play at your comfortable tension and not be tied down to the "recommended" tensions or what other people use. Your hitting technique is also important in playing properly and preventing yourself from breaking your racquets. In conclusion, play smart, play properly. Don't hurt yourself or your racquets.