ZOOM Bicycle Wire-Controlled Hydraulic Lift Seat Tube Mountain Bike Seatpost Size:30.9mm Specification:400mm Internal Routing

Details:1. Material: Aluminum alloy2. Weight: about 628 grams for outer wiring 30.9 mm about 650 grams for outer wiring 31.6 mm about 653 grams for inner wiring 30.9 mm and about 679 grams for inner wiring 31.6 mm3. Length: 375 mm for outer wiring 400 mm for inner wiring4. Specification: 43x42mm 5. Stroke: 100 mm6. Wall thickness: 3mm7. Diameter: 30.9/31.6mm8. The length of the internal cable: 170 mm (can be cut according to the bicycle)9. Applicable models: road bikes mountain bikes etc.10. Color: blackFeatures:1. Double-nail rear drift design both screws use 10.9 torque the screw locking is more stable2. Sealing ring design rainproof and dustproof protect the seat tube and will not leak oil3. The lifting seat tube adopts oil pressure system with high lubricity4. The suspension rod will not be affected by the side5. Coil springs provide proper compression and rebound damping making riding easier6. There is a fine adjustment screw on the bottom which has been adjusted and