Fork Springs

Technical Non OEM Parts List
1

http://dfaulknersprings.com/data/2011price.pdf
http://www.springcoil.co.uk/products/
Anyone thinking of uprating their front forks here is a couple of firms who will make the springs to your requirements.

http://www.sonicsprings.com/catalog/calculate_spring_rate.php
This site calculates the spring rate for you and the bike’s weight.

So for my 1200 Breva the info required is: 38mm outside diameter, 280mm long, 1.0kg/mm constant spring rate and 120mm of travel (taken from workshop manual).
I used Springcoil at £60 the pair but Faulkners were very helpful too.

2

Are those progressive ot single weight?

3

They are single rate.
I did a bit of research and the experts tend to go for single rate. I suppose it makes sense if you are applying the correct spring to your weight.