Dunlop Explosive Spin Review - 1.25 mm Black
Tension(s) used for playtest:
I strung up Explosive Spin at 51 pounds in the center eight mains, decreasing to 38 pounds at the outer mains, and at 45 pounds in the center five crosses, decreasing to 32 pounds for the top and bottom cross.
Regular string set up & tension:
Tourna Silver 7 Tour 17 gauge, strung at the same tension and in the same manner as Explosive Spin
Racquet used for test:
Wilson Blade SW104, handle weighted to 354 grams static weight and 12 points HL
Power/Control of test string:
The power level of Explosive Spin is a bit above average for a poly string. The response is very linear in that the ball speed varies directly in proportion to how fast the racquet is swung. This made it easy to feel confident I could put the exact amount of speed on the ball that I wanted. Directional control was very consistent, and combined with a relatively low sensitivity to incoming spin made me feel like I could aim for tighter targets, especially on volleys and touch shots. Putaway power was nice and high - it felt like Explosive Spin had a lot more capacity for high racquet head speeds than I could generate. Flat first serves were rewarding to hit with Explosive Spin.
Compared to other strings, it is very similar to but slightly above the power levels of Solinco Confidential or Hyper-G, and slightly lower than that of Tourna Silver 7 Tour. It has less sensitivity to incoming spin than these three strings, and also a slightly lower launch angle.
Feel (Stiff? Mushy? Muted? Crisp? Comfortable?):
Explosive Spin is a fairly crisp feeling string with good pocketing sensation. It generates a high pitched and sharp "thwack" sound on impact and also gives more feedback through the racquet, though it isn't necessarily any less comfortable than a more muted string like Solinco Confidential or Hyper-G which tend to hit with more of a drawn out "thud". The feedback generated by Explosive Spin isn't harsh and clearly lets me know how well I've made contact, which combined with the crispness and good pocketing make it a very friendly string that quickly lets me build a high level of confidence. Impact harshness on mis-hits is average to a bit better than average for poly strings, and is more comfortable than Solinco Confidential or Hyper-G.
Spin:
Spin capability is good. It is a lightly shaped string that is relatively thick for the denser string pattern of my SW104, which seems to limit how much grab on the ball the string provides when hitting a skimming, loopy topspin shot. The six-sided Explosive Spin has more rounded edges compared to the sharply defined seven-sided Tourna Silver 7 Tour, which in the thinner gauge that I normally use provides a higher launch angle and more forward ball velocity on skimming topspin groundstrokes.
Spin capability and bite on the ball did decrease over the life of the string, first as the edges wore smooth and it essentially became a round string, and then as it notched and the stringbed started to lock up. Initial spin capability is not quite as good as Solinco Hyper-G or Confidential, but as good or better than any round poly string that I have had experience with. Second serves had less movement and bounce compared with the best of the highly shaped poly strings but the response was consistent and direction control was very good.
Playability Duration (How did it play over time?):
I used Explosive Spin for a total of about eight hours, with six hours of normal hitting on clean indoor courts. Notching was noticeable by two hours of play time even though the mains were still moving back into position. At six hours the string was notched more than half way through with the mains getting stuck out of position. As it was on the verge of breaking, I cut the strings out at that time. After about three hours, the spin capability and launch angle gradually decreased as the string wore smooth, essentially becoming a round string at that point, and the stringbed started to lock up. At six hours, power levels were still good and the ball still felt like it popped off the stringbed with some liveliness on flatter shots, and comfort had not declined. When I cut the strings out, drawback was minimal indicating loss of elasticity. Tension maintenance over the life of the string was average. There was a noticeable amount of initial tension loss which did not seem to affect string performance, and it seemed that changes to the impact response was more due to the shape wearing smooth and the strings notching against each other.
Tension Recommendations (would you string it differently next time - why):
The tensions I used for Explosive Spin felt just about perfect. It feels like a string that would work similarly and consistently over a fairly wide range of tensions. I personally would not string it with less tension because I really enjoyed the sharper sensations of feedback, and that it performed as I expected over my entire range of racquet head speed capability.
List any additional thoughts (optional):
I strung up Explosive Spin, and found the process to be relatively easy. It has a shiny, plastic feel with low inter-string friction that made weaving the crosses a quick process. The set was 38'8" long and I cut a one foot section and pulled 51 pounds of tension on it and let it sit for a minute. Elongation pulling tension was medium-low for a poly string, and it only stretched minimally sitting with tension for that one minute. This gave the impression that it would be a fairly stiff, crisp string which it did turn out to be. Coil memory was average and the rounded edges did not hurt my fingers during stringing. The last few crosses were a bit more difficult as Explosive Spin did not like to be bent sharply without developing a kink.
The performance stability of Explosive Spin during the initial couple of playing sessions gives the impression that by altering string tension, it can be made more or less powerful, with more or less launch angle, while still retaining many of its good playing characteristics.
Compared to my go-to string of Tourna Silver 7 Tour, Explosive Spin has less spin capability, slightly lower power levels, and a lower launch angle, but a more consistent and linear response to racquet head speed changes, lower sensitivity to incoming spin, and a better ability to pinpoint shots.
Overall, Dunlop Explosive Spin is a very good new string that offers a crisp, consistent response with good pocketing feel and excellent control. It is similar to the other newly release "pro" strings in that ultimate spin capability has been lowered and balanced with higher power levels, less sensitivity to incoming spin, and a very consistent response. For players with high racquet head speed capabilities, Explosive Spin will probably provide all of the spin capability they need along with the ability to generate very high ball speeds. For recreational level players who rely on spin but may not have ultra high levels of racquet head speed, a more and sharply shaped string will provide more capability than Explosive Spin.
Thanks to Dunlop and Tennis Warehouse for the opportunity to test Explosive Spin.