Engineered for aggressive all-mountain exploration and technical singletrack, the Polygon Siskiu T7E Frameset* provides a versatile full-suspension e-MTB platform built around Polygon's proven ALX trail geometry. Featuring 140mm of rear wheel travel and designed for 150mm front suspension forks, this hydroformed aluminum frame integrates a downtube battery housing for Shimano STEPS drive systems. Complete with a geometry flip-chip, internal routing, and Boost axle spacing, it offers the ideal chassis to build a fast, planted, and capable custom trail e-MTB.
*Frame only without rear shock

Technical Specifications

• Frame Material: ALX Alloy Trail e-MTB Frame, Hydroformed 6061 Aluminum

• Rear Suspension Travel: 140mm via One-Piece Linkage platform

• Recommended Fork Travel: 150mm (Compatible up to 160mm single crown)

• Rear Shock Dimensions: 210 x 55mm (Open Eyelet)

• Motor & Battery Integration: Designed for Shimano STEPS EP801 / EP8 drive units & integrated 630Wh downtube battery

• Rear Axle Spacing: 12x148mm Boost Thru-Axle

• Wheel Size Compatibility: 29" front & rear or 29"/27.5" Mullet setup (via Flip-Chip adjustment)

• Headset Standard: ZS 44/28.6 | ZS 56/40 Tapered

• Brake Mount: Direct Post-Mount Disc (203mm rotor max rear)

• Cable / Dropper Routing: Internal shift, brake, display wire, and dropper post routing

• Intended Use: All-Mountain, Trail, and E-MTB Riding