So your saying the 6” RC strut they sell is a shorter overall length than the factory strut with the RC spacers therefore the strut will produce better angles?
Wouldn’t that mean less lift height?
I really don’t see your logic that an extended length strut is stronger than the top hat spacer on a lifted truck.
Lift amount and angles would be identical, or close to it at ride height.
The benefit of the replacement strut is that it would limit the down travel of the suspension to prevent ball joint and cv joint issues.
It has nothing to do with strength of one vs the other.
For example sake, let’s say that a stock strut bottoms out at 5” of down travel, and that is the max angle for the cv joints.
Now, let’s look at my truck with a 6” lift.
It has 6” strut spacers, but the drop brackets for the lower control arms only lower the arms by 4”. This difference means that at ride height, my lower control arms, and axle shafts are at a slightly steeper angle than stock, and can no longer tolerate the stock amount of down travel.
The stock strut with a spacer will still allow the same 5” of down travel, which because of the steeper angle at ride height, will push the cv joints past their acceptable angles.
The replacement struts are made to keep the same ride height, but the internal stops are designed to limit the max down travel to keep the cv and ball joints happy.
And again, in daily driving, this isn’t an issue. It only becomes an issue when you are repeatedly fully extending the front suspension.
Disclaimer: dimensions in my example are only approximations.
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