Donic Waldner Black Devil Carbon Balsa vs Sanwei Fextra 7: Which Should You Buy?

UltraSpin comparison · 2026-06-11 · blade

Donic Waldner Black Devil Carbon BalsaSanwei Fextra 7
Our rating7.8/108.3/10
feelstiff, minimal dwellMedium, woody and well-damped with moderate vibration; controllable offensive feel close to a Stiga Clipper but a touch crisper and not quite as stiff
handleAnatomic / Flared / StraightFL
plies7-ply: Koto outer + carbon + balsa core7-ply all wood (Limba/Ayous)
speedOFF+OFF-
thickness_mmapprox 6.0mm6
typeOFF-
weight_garound 84g88

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Donic Waldner Black Devil Carbon Balsa is ultra-light (84g), stiff, minimal dwell—pure flat-hit speed for experts. Sanwei Fextra 7 is an affordable 7-ply all-wood spin looper at 20-30 USD with excellent control, large sweet spot, and versatile rubber compatibility.

Black Devil is exclusively for advanced flat-hitters unwilling to spin. Fextra 7 suits intermediate club-level spinners and value-seekers.

They serve opposite philosophies: Black Devil maximizes pace at spin’s expense; Fextra 7 maximizes value and spin at pace’s expense.

FAQ

Which is better for beginners and value-seekers?

Sanwei Fextra 7; Black Devil is too demanding and expensive for beginners.

Which generates more topspin?

Sanwei Fextra 7 with spinny 7-ply all-wood construction; Black Devil’s minimal dwell prevents heavy topspin.

Which is faster?

Donic Waldner Black Devil at OFF+ (7.8) versus Fextra 7 at OFF- (8.3 rating); ratings suggest similar speed, but feels differ vastly.

How much cheaper is Fextra 7?

Sanwei Fextra 7 at approximately 20-30 USD versus Black Devil at premium carbon pricing; dramatic cost difference.

Which pairs better with diverse rubbers?

Sanwei Fextra 7 with both tacky and non-tacky rubber versatility; Black Devil demands specific soft-medium pairing.