Probox 2018 Heavy Duty Springs

The 2018 Probox uses a MacPherson strut front and a coil-spring rear suspension. While the factory springs are comfortable for light use, the Probox’s role as a “commercial workhorse” often exceeds their capacity, investing in heavy-duty springs is the most cost-effective way to transform the vehicle’s utility.

Why Choose Heavy Duty (HD) over Standard?

1. Load Management: Standard 2018 Probox springs are designed for passenger comfort. HD springs use a thicker wire diameter (often 14mm–16mm) and higher-tension steel. This allows you to carry heavy cargo or a full house of passengers without the car “bottoming out” on speed bumps.

2. Increased Ground Clearance: In Kenya, the Probox is often used on “off-tarmac” roads. These springs are slightly taller and stiffer, effectively acting as a “lift kit.” This protects your oil sump and exhaust system from hitting stones and uneven ridges.

3. Stability & Control: HD springs reduce “body roll” during cornering. By keeping the car more level, you maintain better tire contact with the road, which improves braking efficiency and prevents the “vague” steering feel common in overloaded vans.

Common Brands at the 10k Price Point

• OBK (Japan): Recognizable by their grey or black finish. They are the standard for durability in the Kenyan market.

• Kings Springs (Australia): Usually yellow or blue. These are premium progressive-rate springs that stay comfortable when the car is empty but become very stiff under load.

• KYB K-Flex: Excellent OEM-plus quality, often preferred for maintaining a balance between cargo capacity and original ride quality.