P
PolygonSiskiu D
mtb
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Origin
The Siskiu D appeared in 2018 as Polygon's entry into the XC trail full-suspension category — a more affordable alternative to the aggressive Siskiu T. It uses a simplified one-piece linkage rear suspension that Polygon developed to minimize flex while keeping weight and cost down. The Wheel Fit sizing strategy (27.5 for smaller frames, 29 for larger) addresses fit-to-performance balance across rider heights.
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Specifications
- Frame
- ALX XC Trail alloy, 6061 triple-butted heat-treated, 120mm rear travel, one-piece linkage rear suspension system (reduces lateral flex and twist in rear triangle)
- Drivetrain
- Shimano 1×11-speed with 32T crankset and 11–50T cassette (D7); Shimano Deore 10-speed 10–42T (D6); Shimano 9-speed 11–46T (D5)
- Brakes
- Shimano hydraulic disc, 180mm front / 160mm rear rotors (adult models)
- Wheels
- Alloy double-wall or tubeless-ready X-15 rims; 27.5-inch (S/M) or 29-inch (M–XL) — Polygon Wheel Fit system
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The verdict
+Strengths
- Affordable entry into full-suspension XC with quality RockShox suspension on D7
- Wheel Fit sizing system genuinely improves fit across the range
- One-piece linkage keeps maintenance simpler than complex multi-link designs
−Weaknesses
- 120mm travel is conservative compared to trail-oriented competitors
- Lower tiers (D5/D6) use SunTour suspension, which lags behind name-brand forks for tunability
- Geometry is less aggressive than the Siskiu T, limiting descending confidence on technical terrain
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Tags
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Related models
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