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Spring rate question

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Old Mar 7, 2017 | 10:41 PM
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Spring rate question

Take a look at page 6 of this link:
https://www.fleet.ford.com/truckbbas...2/expedicd.pdf

Look at the Rear Coil section. Look at the column near the far right labeled Deflection at Ground with the units of lbs per in. Why are there 2 values for each row? XLT vs Eddie Bauer trim? Those numbers seem to be pretty far apart.

Any ideas?
 
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Old Mar 8, 2017 | 11:49 AM
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Probably variable rate springs.
 
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Old Mar 8, 2017 | 09:00 PM
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They don't look like the progressive rate springs I'm used to seeing.
 
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