You can measure the coil spring on your own without its measuring ruler.
1. Check to see if the shock absorber is a coil spring type
(if your shock absorber is the coil spring type, you should be able to install the cushion buffer.)
2. Prepare a ruler, paper, and scissors
(prepare a piece of paper without any wrinkle or folded spot.)
3. Place the paper between the space of the coil spring
(you may also be able to measure the space in the rear wheel depending on the vehicle model.)
4. Take out the paper and measure the gap with a ruler
(let us have your measurement. Then we will send you a cushion buffer in a right size.)
1. Measuring the gap in the spring in the rear wheel
(you may have to measure the gap in the rear wheel for certain vehicle models. Therefore, please check the real wheels as well.)
2. How to measure the gap under the vehicle
(place the paper between the space of the coil spring)
Do not measure the gap while the vehicle is lifted
it is improper that you measure the gap while the vehicle is lifted by a vehicle jack or lift. The cushion buffer shall only be used when the vehicle is on the ground. While the vehicle is lifted, the shock absorber spring stretches. Thus, any measurement under this condition is improper, and you cannot find a right type of cushion buffer by an inappropriately measured size. Moreover, if a wrong cushion buffer is installed and used in a vehicle, it will affect the performance and life span of the cushion buffer.
Cautions for the vehicle whose coil springs have been changed
whether the shock absorber springs have been changed, you may install cushion buffers as long as the type of the suspension is a coil spring. If the vehicle has a type of tuned coil spring (UP/DOWN spring), the gap in the top and the gap in the bottom part of the spring could be different. In such case, please determine where the cushion buffer should be installed prior to measuring the gap.
the following safety rules when you measure the urethane cushion buffer in the vehicle on your own. Please always be aware of safety when you measure it.
Parking on a flat ground
When you measure the cushion buffer, you should park your car on a flat ground where other cars do not run around.
Turning off the vehicle engine
When you measure the cushion buffer you should turn off the vehicle engine. It is dangerous that you measure it while the engine is running.
Shifting the gear to 'park'
When you measure the cushion buffer, you should shift the gear to "park" (if the vehicle has an automatic transmission).
Setting the parking brake
When you measure the cushion buffer, the parking brake should be set.
Having all passenger and load stay out of the vehicle
When you measure the cushion buffer, your vehicle should not have any passenger or load.
Securing the safety around the site
When you measure the cushion buffer, you should select a place where other vehicles are not running around.