I want to replace the front springs on my 04 f4i
What spring rate would I need?
This is for street riding and not track
I weigh 165lbs. (without gear)

 

.85 i would say...check ohlins site as well as racetech.

 

Looks like you were correct
Thanks for the info

from racetech website

Rider Weight: 165 lbs.
Recommended Spring Rate: 0.815 kg/mm (use closest available)
Stock Fork Spring Rate (measured): .660 kg/mm (stock)
Available FRSP S3732 Series Springs are:

 

hey but check it mang...their spring rating is actually a bit less than...say...ohlins.
i went with .85 up front, which is for a 165, but know that full gear, you'll be more...but it's plenty stiff for me so it's all good.

 

You might seriously consider other sources like Aftershocks, GP Suspension, Lindemen, Traxxion Dynamics, etc. These folks tend to handle better products and/or more actual racecraft knowledge.

Cheers

 

yea race tech is blah...ohlins is good...