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I guess people just don't understand how the 6 pack shocks work or maybe they don't know how to set up shocks and bump stops, I know I see a lot of that out there on the road.If you take the same jeep and install the rocksport 11" travel shock on one side then install the 13" travel 6-pack with its bracket on the other side. At full droop the axle would be level at the same plane. The 6-pack side would give your jeep any more actual droop over the 11" travel rock sport due to the longer body so where is that extra 2" of suspension travel? Its on the upside, allowing the axle to stuff further up because of the shorter compressed length. We are talking travel here and tire size and lift is irrelevant to the discussion.
Are you talking front or rear? The front 6paks have 15" of travel, the rear 13".
Front Rocksport has 11.4", rear 11". So where is the extra travel allocated according to the mounts...
Both 6pak shocks require 1" bumpstop compared to the Rocksport 2". So, yes 1" is more uptravel.
But the other extra 2.5" and 1" of travel compared to Rocksport is downtravel.
Extended length on the 15" travel 6paks is 28.25 vs the front Rocksport 27.3, but that doesn't take into account the mounting position of the 6paks, which in the front moves the upper mount lower by about 1.5". So now, fully extended, they're sitting as low droopped as a 29.75" regular positioned shock. And there's that extra 2.5" downtravel compared to the Rocksports.
The rear are similar in that they gain an inch of uptravel due to the only 1" bumpstop requirement. I believe the downtravel is about the same as the Rocksport (no numbers on website and not driving either jeep today to check). But what you gain is an important (in my experience) few inches of clearance if you cut off / trim up that rear shock mount, since the 6pak moves the rear lower mount up a few inches.