Two words:
Tension Loss
1. Topspin Cyberflash 17L is one of the worst strings on record in terms of initial tension loss. Ranks #214 out of 239 Polys tested. When strung at a reference tension of
51 lbs, (and with a fast swing speed) it suffered a 30lb loss after a few good whacks with the test hammer, settling in at
21 lbs. Wow.
2. CyberFlash 16 fares a little better at #125, losing 23.6 lbs.
3. The Poly with the #1 best tension maintenance digits, Luxillon 4G 1.25, lost only 10.8 lbs under the same exact test conditions, settling in at a much more acceptable 40.2 lbs.
4. I know, I know, the lab is not the court. A test hammer is not a tennis ball. But it's really hard to ignore such a huge indicator like this. Cyberflash is pulling digits indicating initial tension loss 2-3 times greater than the polys that were designed to minimize tension loss, like the 4G and the LTec Premiums.
5. That huge tension loss also a big part of why it's testing with such low stiffness numbers, if it's actual pre-stiffness testing tension is 21 lbs, of course it's going to pull very low stiffness, high comfort numbers.
http://twu.tennis-warehouse.com/learning_center/reporter.php
- Jack