Contitech Sz51 7

Updated August 15, 2026

Overview

Product sourcing insights & recommendations

24 来源

The Contitech SZ51-7 is a critical component in commercial vehicle ergonomics, primarily serving as a sleeve-type air spring for heavy-duty driver seats (Trucks, Tractors, and Construction Machinery) Walmart Alibaba Fruugoindia. It is engineered to provide precise vibration isolation and height adjustment, significantly reducing driver fatigue during long-haul operations Alibaba Aliexpress.

Product Technical Profile

The SZ51-7 is valued for its compact, lightweight design (approx. 0.36–0.42kg) and high-pressure capability Alibaba Mrostop.

Dimensions: Design height of 96mm with a stroke range of 38mm to 145mm Alibaba Mrostop Mrostop.
Performance: Supports inflation up to 120 psi and is rated for ≥3 million cycles in premium aftermarket versions Mrostop Alibaba Mrostop.
Environment: Operating temperature range from -30°C to +90°C, making it suitable for extreme global climates Alibaba Mrostop.

Market Trends & Insights

The global air suspension market is experiencing a 7.6% CAGR, projected to reach $17.5 billion by 2035 Market. Key drivers for the SZ51-7 specifically include:

Ergonomic Demand: Rising regulatory and health standards for driver comfort in the trucking and agricultural sectors are fueling the replacement of traditional seat springs with air suspension Alibaba Marketresearchfuture.
Aftermarket Resilience: Fleet managers are increasingly pivoting toward ISO-certified aftermarket parts that offer OEM-equivalent performance (2–3M cycles) at a 50-70% cost reduction compared to original replacements Alibaba Continental.
Supply Chain Strategy: Procurement often peaks in late Q4/early Q1 for fleet renewal. Key manufacturing hubs in Guangdong and Shandong (China) offer stable lead times (7–14 days) for bulk B2B sourcing Alibaba.

Sourcing & Commercial Data

The current B2B market offers competitive pricing and stable availability for the SZ51-7 model:

Pricing: B2B wholesale prices range from $7.99 to $17.50 per unit, depending on order volume and material reinforcement (e.g., plastic vs. metal piston) Alibaba Alibaba.
MOQ: Small-batch sourcing is highly accessible, with minimum order quantities as low as 5 to 50 pieces Alibaba Alibaba.
Certifications: Leading suppliers maintain IATF 16949 and ISO 9001 certifications, ensuring compliance with global automotive safety standards Alibaba.

Here is the market and product analysis for the Contitech SZ51-7. You can continue by:

Sources & References

24 sources cited · Verified industry data & reports

Air Suspension Spring Bag SZ51-7 SZ51-4 A164 ...

Amazon.com

Designed for compatibility with Continental and Contitech air suspension systems, this universal air spring bag fits models including SZ51-7 and SZ51-4.

SZ 51-7 Continental Sleeve-type, Cylindrical Air Spring

MRO Stop

Product Description. Attribute Table: Compressed Height. 1.51". Max Expanded Height. 3.78". Max Diameter. 5.08". Max Inflation Pressure. 120 psi. Max Stroke ...

Contitech SZ51-7 Universal Rubber Sleeve Air Spring ...

Alibaba.com

Weight :0.42kg. Design height :96mm. Deflection(Height min) :65mm. Deflection(Height max) :145mm. Working stroke :80mm. Measurement d max :120mm

Truck and Bus Suspension Airbags Contitech SZ51-7 SZ51-4 ...

hnjingfu.com

Parts Number: SZ51-7 SZ51-4 A164 HS C 51-7 ; Size: Standard and customizable ; Application: Truck and Bus Engine ; Packing: Neutral, authentic, custom wrapping ...

SZ51-7 For Continental Contitech SZ51-4,Air Suspension ...

fruugoindia.com

In stock + ₹770.49. For Car/Truck/Trailer Driver Seat ・ 164Application: For CAR,TRUCK,TRAILER SEATItem Type:Seats generic.show-more. Category: Motor Vehicle ...

SZ51-7 is compatible with Continental Contitech SZ51-4 ...

Walmart.ca

Universal Air Suspension Spring Bag For Car/Truck/Trailer Driver Seat Part PART number: SZ51-7,SZ51-4,HINO. Application: For CAR,TRUCK,TRAILER SEAT Item Type: ...