w-w-w primary spring, 89a-10 primary weights, 48/42 helix. Can,t remeber the rivet size & placement but this kinda works well on lakes & straight trails. Backshift ain,t good but you can,t have good backshift & wicked acceleration.
I second the Heavy Hitter notion! I had Heelclickers and didn't like them as much as I do my HH. The Heelclickers might have had a little more low end, but I can get much more top end out of the Heavy Hitters.