FX 500 Tour
Sonic Core Infinergy / graphite. 98 in² head, 305 g unstrung, 31.5 cm unstrung balance, 16×19 string pattern.
Where to buy
prices as we recorded them, not a live feed — each row says whenSix criteria
calculated from the verified specifications, scored out of 10, shown against the category averageSpecifications
Where it wins and loses
against the average for this categoryWithin 0.3 of the category average: neither a reason to buy this frame nor a reason to avoid it.
From 98 in² head, RA 65.
Above the average for this category, so this frame suits a player who aims at lines and wants the ball to go there.
From 16×19, 98 in² head.
Within 0.3 of the category average: neither a reason to buy this frame nor a reason to avoid it.
From RA 65, 305 g.
Within 0.3 of the category average: neither a reason to buy this frame nor a reason to avoid it.
From 16×19, balance 31.5 cm.
Within 0.3 of the category average: neither a reason to buy this frame nor a reason to avoid it.
From 305 g, balance 31.5 cm.
Within 0.3 of the category average: neither a reason to buy this frame nor a reason to avoid it.
From balance 31.5 cm, 305 g.
Tension calculator
The calculator takes this frame's verified specs plus your playing style and returns a tension in kilograms and pounds, with the reasoning behind the number.
A 98 in² control frame at 305 g with the widest published tension range of any racquet here (20–29 kg) — a frame built to be tuned rather than played one way.
What the sources agree on
The smaller 98 in² head paired with 305 g and a 322 swingweight is a classic tour-control profile: smaller heads are the most consistent lever for precision over forgiveness, and the added static weight over the 100 in² frames in this batch shows up directly in the derived 8.4 stability figure. RA of 65 sits close to the Pure Aero's 66 — moderately flexible rather than stiff — broadly consistent with a control-oriented rather than pure-power intent.
Where they disagree
A 20–29 kg published range is unusually wide, and where a player actually strings within it changes the racquet's character more than almost any other single decision — we can describe the frame's built-in ceiling and floor from the spec sheet, but not which point in that range plays best, since that's a bench-and-court question we haven't run yet.
