Aftermarket spring for Tech 39mm front fork with aluminium tubes.

Features:
* high quality chrome-silicon wire
* cold coiled, heat treated and pre-set 3x for optimal performance and durability
* only suitable for the Tech 39mm fork with aluminium tubes

Which one to choose?
* 6.8-9.5N/mm - rider weight 80 to 95kg
* 7.3-10.0N/mm - rider weight +95kg