The HiCalibre 20-071 series rear shock springs are progressive-rate springs designed for KTM motorcycles using WP XPLOR and PDS rear suspension systems requiring a 60 mm internal diameter and 230 mm free length spring. Manufactured in the USA using high-grade chrome silicon spring steel, these springs are designed to improve traction, comfort and suspension support across a wide range of offroad riding conditions.

Why Choose a HiCalibre Progressive Shock Spring?

Progressive springs increase in spring rate deeper into the suspension stroke, allowing the initial part of the travel to remain compliant while increasing resistance during larger impacts, braking loads and acceleration forces. Many recreational riders and club-level racers prefer progressive springs because they can improve comfort and traction in rough terrain while still maintaining good bottoming resistance.

Compared with a linear spring, a progressive spring can provide a more forgiving feel in technical terrain and chopped-out conditions without making the motorcycle feel unstable deeper in the stroke. Rider preference remains highly individual, which is why Teknik Motorsport supplies both progressive and linear spring options across multiple brands.

Key Features

• Progressive-rate design for improved comfort and bottoming resistance
• 60 mm internal diameter x 230 mm free length configuration
• Produced from high-grade chrome silicon spring steel
• Cold coiled, heat treated and tempered for durability
• Shot peened and preset for improved fatigue resistance and rate consistency
• Spring rates engraved or etched on the spring ends for identification
• Suitable for WP XPLOR and PDS rear shock applications

HiCalibre, Eibach and Race Tech Progressive Rate Comparison

The HiCalibre 20-071 spring range uses progression characteristics broadly similar to the Eibach 874 series and Race Tech SRSP progressive spring ranges commonly used on KTM WP suspension systems. Riders familiar with Race Tech SRSP or Eibach progressive spring options can generally select comparable progression ranges within the HiCalibre lineup.

• 5.1–5.7 kg/mm similar to softer OEM-style progression options
• 5.7–6.3 kg/mm comparable to Race Tech SRSP P35 / Eibach 5.5–6.6
• 6.0–6.6 kg/mm comparable to SRSP P35–P40 range
• 6.3–6.9 kg/mm comparable to SRSP P40 / Eibach 5.9–7.1
• 6.6–7.2 kg/mm comparable to SRSP P40–P45 range
• 6.9–7.5 kg/mm comparable to SRSP P45 range
• 7.2–7.8 kg/mm comparable to SRSP P50 / Eibach 6.7–8.0
• 7.5–8.1 kg/mm comparable to SRSP P50 range
• 7.8–8.4 kg/mm comparable to SRSP P55 range
• 8.1–8.6 kg/mm comparable to SRSP P55–P60 range
• 8.4–9.0 kg/mm comparable to SRSP P60 / Eibach 7.5–9.0

Specifications

• Brand: HiCalibre
• Series: 20-071
• Category: Rear Shock Springs
• Spring Type: Progressive
• Inside Diameter: 60 mm nominal
• Free Length: 230 mm nominal
• Fitment: WP XPLOR and PDS rear shock systems
• Applications: KTM EXC, EXC-F, XC-W, Husqvarna and GasGas offroad models using compatible WP shocks
• Contents: Sold individually

Availability and Ordering

Some spring rates are manufactured in lower production volumes and may attract higher pricing or longer lead times. Backordered springs are typically supplied via air freight from the USA with estimated delivery times varying depending on production availability.

Upgrade Your Ride

Correct spring selection is critical for suspension balance, traction and chassis stability. Teknik Motorsport offers progressive and linear rear shock spring options to suit different rider weights, riding styles and terrain conditions.