2865 vs 2866

Shawntt17

New Member
Oct 6, 2017
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Hello guys, this is my first time posting. I am getting ready to order my lift and I am having trouble deciding between the 2865 and 2866. I like the idea of a progressive spring but I am confused, on the spring chart it says the 2866 is 10 mm of lift vs the 2865 is 40 mm of lift. Can someone please explain the differences and also the pro's and con's of each. Thanks.
 

Sal R.

Very Well-Known Member
Apr 6, 2017
311
177
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San Diego
865 has a smaller diamter (17mm) coil wire, lower spring rate (220) and is linear.
866 has a larger diamter (18mm) coil wire, higher spring rate (240/300) and is progressive.

The chart has differing lift heights for 866 and is dependant on a constant load.

All else being equal, 866 will give a taller ride height because it has a taller free height and takes more weight to compress.

Pros and cons are too black and white. It all depends on what you wanna do (go fast whoops or slow crawl off-road).
 

Nisken

Active Member
Dec 12, 2017
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I have 2866's and 5100's on the rear of my sequoia. It gave a rear lift higher than expected but i'm growing to like it. Matched with 2885's/5100's up front the truck has a good rake to it. 2866's bring a much improved ride over stock springs.

I can't speak for 2865's.