How to measure the size of coil spring

There are different methods you can use to know the  spacing  between shock absorber’s coil springs at both front and rear sides, 

first methods by using car model size application and this method not always accurate 

other methods by measure it by yourself by using measurement gauges as at picture below if found,

Or making your own measuring ruler as below:

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.)

PLEASE NOTE (*)

Some shock absorbers are located inside of the wheels depending on the vehicle models. Please refer to the picture below

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)

Also you can use simplest method by measuring spring spacing by your hand fingers as below:

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Place your fingers between the space of the middle coil spring and stop where your top and down area of your fingers touch the coil spring and know the touching point
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Measure the distance between touching points of your fingers with a ruler to know the spacing distance for example here is 30mm
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Place your fingers between the space of the middle coil spring and stop where your top and down area of your fingers touch the coil spring and know the touching point
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Measure the distance between touching points of your fingers with a ruler to know the spacing distance for example here is 37mm
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Special cases for some coil spring

There are some cases for some special coil spring most used for sport car which upper and lower coil spring spacing shorter than middle coil spring spacing and that require special TTC urethane buffer type for example when measuring the middle coil spring spacing and  find out it  fit buffer type A and when passing down it fit cushion buffer type B in this case we use special TTC cushion buffer called  A1 .

other special TTC cushion buffer called S1 which fits middle spring size S and passing to lower or upper spring fit size A.

Special size for S1 and A1 that only available at TTC URETHANE BUFFER. Applicable for sports spring in car suspension

size1 - A1

Important points

1

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.
 

2

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.

 

Safety rules when you measure

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.

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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.

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Turning off the engine

When you measure the cushion buffer: You should turn off your vehicle engine. It is dangerous to measure it while the engine is running.

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Shifting the gear to ‘park’

When you measure the cushion buffer: You should shift the gear to “park.” (if your vehicle has an automatic transmission)

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Setting parking brake

When you measure the cushion buffer, the parking brake should be set.

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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.

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Securing the safety around the site

When you measure the cushion buffer, you should select a place where other vehicles are not running around.