Kästle TX88 UP — Review

The TX88 UP is the durability-focused sibling of the TX88 — same 88 mm waist and same 10.2 m radius, but with a paulownia/poplar twin core instead of pure paulownia and a semi-cap sandwich construction with a brushed protective topsheet. The result is 125 g more per ski (1,245 g at 167 cm) traded for a more solid downhill feel and noticeably better durability on rocky skin tracks and chunky descents — Kästle positions it as the right tour 88 for experienced skiers and those starting touring who want confidence over outright uphill efficiency.

On the up the TX88 UP is 125 g heavier per ski than the TX88 — not a deal-breaker on shorter tours, but you feel it on multi-thousand-vertical days. On the descent the difference shows up the other way: the twin core poplar adds underfoot damping that the carbon-only TX88 lacks, and the semi-cap construction holds an edge through firm refreeze noticeably better. The brushed Armoclad topsheet survives rock contact better than a lighter Hollowtech finish. 10.2 m radius still makes kick turns easy. It is not a soft-snow specialist — 88 mm is still narrow — but it is the right choice for tourers who break out of the skin track onto chunky descents.

Armoclad Sidewall semi-cap sandwich construction with brushed protective topsheet. Ultra Light Twin Core (paulownia/poplar woodcore) — heavier and more damp than the pure paulownia of the TX88. Hollowtech Evo forebody. Low camber profile with Directional Touring Rocker; Hook Free shovel and tail. Factory bevels 88° side, 1° base. Lengths 151 / 159 / 167 / 175 / 183 cm. Measured 1,245 g per ski at 167 cm.

Closest internal sibling is the lighter Kästle TX88 — same shape, paulownia/carbon core, 125 g lighter, more demanding to drive but more efficient uphill. Wider stablemate at the UP tier is the Kästle TX94 UP. Cross-shop, the K2 Wayback 89 mens is the closest American performance-tour rival; the Atomic Backland 88 is the directly comparable Austrian alternative; the Movement Alp tracks 90 is the Swiss alternative with similar damping-focused construction.

Pros

• Twin core poplar adds underfoot damping the TX88 lacks.
• Semi-cap sandwich and brushed topsheet survive rocky skin tracks better.
• 10.2 m radius still makes kick turns and tight switchbacks easy.
• Forgiving build — confidence-focused tourers get a smoother downhill.
• Same length range as TX88 (151-183 cm) covers most adults.

Cons

• 125 g heavier per ski than the TX88 — feels it on long tours.
• Still 88 mm — narrow for soft-snow descents.
• Boutique pricing relative to mainstream confidence-focused 88 mm tour skis.
• Hook Free both ends caps the snap of a stiffer touring ski.
• Not as efficient on the up as a pure carbon-paulownia 88.

Verdict: For tourers starting out or prioritizing downhill confidence over uphill efficiency, the TX88 UP is the right TX in the narrow tour bracket. Performance-focused tourers will prefer the lighter TX88.