Interesting. 5" travel may work. I'm more concerned about over extension than bottoming.
How much shock travel does a street car need?
This depends on what type of suspension you have. It differs between straight axle suspensions and independent suspensions.
On straight axle suspension systems, there is a 1 to 1 ratio between the movement of your shock and your wheel. That means if your wheel moves one inch, your shock extends or compresses one inch. In these applications 2.5 inches of shock travel in both directions (compression and extension) should generally be enough.
Depending on the way your suspension is set up, you may need more. If you want to limit body roll for stiffer handling, you may want less travel than that. But even in these cases, your shock should not be thing limiting your suspensionâie being fully extended to keep the car from experiencing body roll.
For independent suspension systems, shocks do not require as much travel. Thatâs because the control arm acts as a lever. So, while your shock may only be moving an inch, your wheel could be traveling two inches. It could be moving three inches. It all depends on where your lower shock is located. The closer your shock is to your wheel, the closer to 1:1 that motion ratio will be.
When measuring for shock travel on an independent suspension system, start with wheel travel. Make sure it can move 2.5â in both directions. To check this, measure between your upper and lower shock mount when your suspension is fully compressed and at full droop. This will tell you how much overall stroke youâll need to keep from bottoming out or topping out your shock.