Pick your frame and how you play. We calculate the tension from the frame's verified head size, string pattern and stiffness, then name what to put in it — the whole bed in one string, or a hybrid, each with its own number and its own knot count.
For Babolat Boost Aero 2026 (260 g) · Heavy-spin baseliner
Polyester through the mains and the crosses. One piece through the whole bed, so a knot at each end — two. Some frames and some stringers take two pieces instead, and then it is four.
Polyester in the mains for the bite, multifilament in the crosses for the arm. Two different strings is two pieces of string, so a knot at each end of each — four. There is no one-piece hybrid.
Scored against this frame out of the 120 strings on file — family, shape, gauge and price. Each card says where it sits in the proposal above; the two without a setup are the next best the engine scored for this frame.
polyester · 1.20 mm · €14.52
hybrid set · 1.24 mm · €18.95
Open product pagemultifilament · 1.25 mm · €11.90
synthetic gut · 1.30 mm · €4.95
Prices as we recorded them on 22 Sep 2026, not a live feed — check the shop before buying · We may earn a commission when you buy through these links, at no cost to you — it never changes a score.
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