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- USA
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
ZOOM Bicycle Wire-Controlled Hydraulic Lift Seat Tube Mountain Bike Seatpost, 30.9mm 400mm Internal Routing, 31.6mm 400mm Internal RoutingDetails: 1. Material: Aluminum alloy 2. 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 mm 3. Length: 375 mm for outer wiring, 400 mm for inner wiring 4. Specification: 43x42mm, 5. Stroke: 100 mm 6. Wall thickness: 3mm 7. Diameter: 30. 9 31. 6mm 8. The length of the internal cable: 170 mm (can be cut according to the
Details:
1. Material: Aluminum alloy
2. 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 mm
3. Length: 375 mm for outer wiring, 400 mm for inner wiring
4. Specification: 43x42mm,
5. Stroke: 100 mm
6. Wall thickness: 3mm
7. Diameter: 30.9/31.6mm
8. 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: black
Features:
1. Double-nail rear drift design, both screws use 10.9 torque, the screw locking is more stable
2. Sealing ring design, rainproof and dustproof, protect the seat tube, and will not leak oil
3. The lifting seat tube adopts oil pressure system with high lubricity
4. The suspension rod will not be affected by the side
5. Coil springs provide proper compression and rebound damping, making riding easier
6. There is a fine adjustment screw on the bottom, which has been adjusted and no adjustment is required
7. The material is durable and easy to install
Specification:
| Package Weight |
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1926 reviews
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Product Reviews
★★★★★ 3
Nice but dissapointing
So it sometimes stays cool but if it’s under a blanket and you have your body on it at all it will get warm but the spots you don’t use will get cool sometimes. I am very disappointed in the material though because it’s like my dry skin scratched the pillow case all over which makes me question it and I don’t think I would buy again.
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Reviewed in the United States on December 15, 2025
★★★★★ 5
Soft and smooth cover
Color: Grey, Size: Body（20"X 54"）
This is a nice pillow cover overall. The fabric feels good and it's comfortable to sleep on, especially compared to a more basic cotton cover. It is maybe a little thinner than I expected, so if you want something thick and heavy this probably isn't that. But for a soft smooth cover that fits and feels decent, I think it's worth it. No major complaints from me after using it.
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Reviewed in the United States on May 16, 2026
★★★★★ 5
These are the ones you want
Color: Grey, Size: Body（20"X 54"）
May need to iron them out when wash/dried but my old ones still look new- soft, cooling, smooth, color is still great. Not itchy or cheap feeling. Buying a new set for family.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Very nice pillowcases
Color: Haze Blue, Size: 2 Pack Standard（20"X 26"）
Very pretty pillowcases. I washed them in cold water and dried them on low before using. They came out a little wrinkly but smoothed out on the pillow. The fabric is shiny and rich looking. It's not hot yet, here in Texas, but I am anticipating the coolness of these pillowcases to feel very nice. I appreciate the envelope closure. It gives it a finished look. There was no odd odor. They feel good like they'll last for a long time. I am a satisfied customer.
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Reviewed in the United States on April 8, 2026
★★★★★ 4
Body pillow covers
Color: White, Size: Body（20"X 54"）
I ordered the body pillow covers. They fit my pillow perfectly and the fabric is smooth and silky, but I did not find them cooling.
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Reviewed in the United States on June 1, 2026
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