W01-358-9978 Firestone Truck Shock Absorbers 1T15M-4 Rubber Bellow Air Spring

1T9978 Air Spring Technical Data

Extended Height:17.00 inches
Compressed Height: 7.90 inches
Top Plate Number:3210
Top Plate Width:9.00 inches
Piston Number:9656
Piston Width:9.75 inches

How to Choose the Right Suspension Air Spring for Your Truck

Choosing the right air spring for your truck requires consideration of multiple factors, including vehicle type, load requirements, driving conditions, and compatibility. Here is a detailed selection guide:

1. Determine vehicle information
Truck model (such as Mercedes-Benz Actros, Volvo FH, Scania R series, etc.).

Number of axles and suspension type (front suspension, rear suspension, trailer suspension, etc.).

Year of production (different years may have design differences).

2. Clarify technical parameters
Load capacity (single-axle/dual-axle load, unit: kg or lbs).

Installation dimensions:

Diameter and height (free height/compressed height) of the air spring.

Base fixing method (bolt hole spacing, flange type, etc.).

Operating pressure range (usually 5~10 bar, heavy trucks may be higher).