Hexagonal cross-section for enhanced power and spin
Polyester mono-filament design for durability and consistent feel
Available in multiple gauges and colors to suit player preference
40 feet (12.2 m) length for extended use
Engineered with input from professional tennis players for optimal performance
Summarized by Shop
Diadem Pro X is the most powerful and firm option for string in the Diadem line. Designed with the help of current pro tennis players, this poly string is designed to provide a stiffer option than the Flash string, with a hexagon cross section. The firmness results in an explosive response off the string bed with adequate spin production
Material
Polyester
String Design
Mono-filament
Shape
Hexagonal
Length
40 feet (12.2 m)
Available Gauges
16, 16L, 17, 18 (1.20 mm, 1.25 mm, 1.30 mm, 1.35 mm)
Colors
Silver, Blue, Orange, Black, White, Gray
Summarized by Shop
4.7
28 ratings
5
4
3
2
1
Pro X is a great string for the Axis 98. It pairs well as a hybrid with Flash.
D
Darren · June 21, 2026
This last longer than most strings which lessens the annoyance of switching racquets mid match