Spring Calculator

Spring Calculation

Below is an interactive calculator to help you choose the right spring rate for you.

If you're unsure of any of the sections, please refer to the Key below the calculator.

Please bear in mind that this is an indication for spring rate based on an average riding position - if you tend to load the front more, or the rear more, or if you're a more aggressive, or less aggressive rider, you may want to go either side of the result.

Average leverage ratio
- This is suitable for bikes with a linear leverage curve
- (Less accurate for most bikes)
Known leverage at sag
- This will give you a more accurate spring rate for bikes with a progressive leverage curve
- (Most accurate)
Don't know what your leverage curve is?
- Some manufacturers publish on their websites, some don't. If they don't, this is a great resource: https://linkagedesign.blogspot.com/ (Note - you'll need to use a PC to view the website fully)
- Alternatively, email us and ask us for your leverage ratio.

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Interactive Spring Calculator

Enter in your details into the GREEN cells to get your result.

If you're unsure of any of the sections, please refer to the Key below the calculator

KEY

Riding Weight

This is your weight with all your riding gear and any pack that you carry on you (not the bike). Enter the value in Kilograms

Bike Weight

This is the total weight of your bike, including any tool kits, spares, water bottles, etc. Enter the value in Kilograms.

Chainstay Length

You can get this from your frame manufacturer's geometry chart (tech specs). Enter the value in millimetres.

Wheelbase

You can get this from your frame manufacturer's geometry chart (tech specs). Enter the value in millimetres

Shock Type

Select your shock from the list.

Shock Stroke

You can get this from your frame manufacturer's geometry chart (tech specs or bike specifications). Enter the value in millimetres.

Leverage Ratio At Sag

Enter the leverage ratio value of your bike at the sag point you're after.
Some manufacturers publish this data on their websites, and some will supply it if asked.
There are a number of bikes posted on Linkage Design's blog (a great resource for free).

Desired Sag

Enter in the percentage of sag you would like.
It's best to start with your frame manufacturer's recommendation, but if you have a preferred amount, enter what you would like.
If you don't know either of the above, as a general rule of thumb:

XC Trail 28%
All Mountain/Enduro 30%
DH 33%

If you're a more cautious rider, you may want to increase that number, or if you're a more advanced and aggressive rider, you may want to decrease that number.