Pair of rear springs Jeep Wrangler JKU 4 doors

jku spring

Jeep variable pitch progressive rear springs for Jeep Wrangler JK Unlimited 4 doors.

They are built in Italy with high quality 52SiCrNi5 steel in compliance with the UNI EN 10089 standard, by a company certified by TÜV according to the UNI/ISO 9001:2015 standard.

They are longer than the originals, reinforced with a progressive effect and a soft setting.

From the menu above you can choose the extra length compared to the original trim; it is specified that they have a soft calibration optimized to give maximum off-road performance but still perfectly suitable for road use thanks to the characteristics of the variable pitch springs.

The technical sheet explains the operation of a variable pitch spring.

Progressive springs differ from traditional ones because they have a variable pitch, i.e. the distance between the coils is not constant but varies along its length.
A progressive spring allows you to insert more coils than a traditional spring resulting much softer, and at the same time allowing the spring to gradually harden thus obtaining an extremely soft, comfortable and able to copy the ground but very stable on the road. The stiffness of a spring with the same material and wire diameter is given precisely by the number of turns and their pitch.

The main off road advantages of a progressive spring:

greater ability to copy the terrain;
greater excursion with the same length compared to a traditional spring;
very stable in the lateral passages as it stiffens when squeezed;
greater absorption of sudden obstacles, as by gradually stiffening it brakes any obstacle (boulders, roots, etc.) without reaching a buffer.

The main advantages on the road of a progressive spring:

very stable on fast sections;
much more comfortable than a traditional spring thanks to the high number of turns;
it minimizes roll when cornering as it stiffens progressively when squeezed.

My offroad vehicle

Off road accessories

Pair of rear springs Jeep Wrangler JKU 4 doors

jku spring