Construction: Co-Polyester Monofilament
Gauge: 16L (1.28 mm), or 17G (1.25 mm)
Length: 40 feet (12.2 M) or 660 feet (200 M)
Test Racquet / Tension
Wilson Ultra 100 CV Reverse/16L @ 52 lbs
Gamma has been producing many great co-polyester strings over the years. What makes their strings stand out from the rest are the design materials, tension maintenance and feedback for players. Spin is a common factor with all of their polyester strings, but Gamma Jet takes it to a new level. Jet has a twisted ribbed shape that grabs the ball upon impact allowing for greater spin and ball pocketing.
I was very surprised at first how much spin I could hit with Gamma Jet. The ball always seemed to have massive amounts of topspin even when I was hitting a flat shot. The topspin came in handy especially on the singles court as I could easily pinpoint my forehands and backhands without losing control. This string will snapback more in the stringbed allowing you to really go after your topspin. The power level is not very high since it is a co-poly string, but there is still more power than Gamma Moto or Gamma Ocho. For players that want a little bit more power, I would recommend putting Gamma Jet in the mains and Gamma Gut in the crosses.
Feel / Comfort
Gamma Jet will be pretty stiff and is better suited for players that generate a lot of topspin. That being said though I was still surprised at how much feel I could get with my shots. The ball seemed to stay on my stringbed a little bit longer than normal which I enjoyed on my groundstrokes and volleys. At net there was a good amount of ball pocketing that allowed me to hit angled touch volleys and drop volleys regularly. After playing for a couple of hours the strings do lose a little bit of tension, but you want lose a lot of control thanks to the curved outside texture.
Durability is pretty good, but not the greatest. Usually with textured strings you don’t get a lot of life expectancy. This string lasted me about three weeks before I started noticing a significant drop in tension and notches in the crosses or mains. I wouldn’t recommend playing with this string once it becomes very loose because it can be very deceiving. The 16L string will last you much longer than the 17G so be ready to restring somewhat often if you prefer a thinner gauge string.
Topspin junkies will really like this string after playing with it a few times. Although it can be stiff, the string’s feel is still there so you can capitalize on your spin and use it to your advantage. I recommend this string to any players who hit topspin regularly and don’t have trouble generating their own power.
About the Reviewer: Chris Virk-Brown currently works at Tennis Express on the Content Marketing team. He previously played at Neumann University and coached at the collegiate level for 3 years. He is an active USTA League and Tournament player.