Pro Comp Shock question, mainly size.

[badmix]

Looking at getting some shocks for a project im working on. Its hard to do compressed and extended testing, but the static length from eye let to eye let is 15.5"

Here is a shock im interested in but want to make sure it would fit and give me enough movement up and down (compressed and extended)

From ProComp;


Extended Length 18.5 in.
Collapsed Length 11.78 in.
Travel 6.81 in.

If I take the 6.81 divid by 1/2 and add to the collapsed or subtract from extended it puts me close to my static length.

Does it work that way?


http://www.procompusa.com/prodDetail.aspx?partNo=EXP118500&catID=1&subCat=90&ptID=3306&plID=1818

 

[GRINCH]

With those shocks you will have 3" down travel and 3.81 up travel.
To get an estimate on up travel pull a string between the center eyes on your leaf and measure down to your spring plate. This is how much the spring will flex upward until it's flat. Add an inch or two to this measurement to account for shackle movement. Down travel can also be ballparked by lifting the rear with the cherry picker.

Not knowing what you are running for lift or if running a shackle flip but I'm thinking will need more travel.

 

[K85 Octane]

is this the front?

you have to flex it if you want to get it just right
can you find a trucking loading ramp? It can be hard, I know, I haven't found but one that doesn't have a rail of some kind on it. Those ramps are perfect for a little late night measuring.

 

[badmix]

Sorry for being vague. its for a trailer.

Here is the undercarriage. The lower shock mount is just to the right of the U bolt holding leaf springs.

 

[K85 Octane]

ah hell dood
who cares if it's for a trailer, all you care about is compression travel. You are going to have very little extension. I'd think 5-7" up travel would be plenty if you are going to be hauling heavy loads, otherwise 3 or 4 would work.