Some are wound tighter, some taper the wire size down, some are shaped like a beehive. The thing about the Tokicos for the 240 is a lot of people don't think they're progressive when they just look at the spring. Once it's on, they're thinking the spring is broken because the first couple coils are almost bound. I'm not sure if they're wound tighter or the wire is tapered, but I'd guess the latter based on the threads I've seen.

Interesting points. I have heard from others the Tockicos were progressives on the front. Funny I can find the tockico shock website with details, but nothing about springs on the site..

My 280 springs do not collapse unevenly like progressive springs would. The coils are evenly spaced on the car. I work closely with Tokico's OEM guys, but they know nothing about the aftermarket stuff. I did once ask them who made the springs and I think the reply was H&R. They definitely do not make the springs. They make dampers, brake parts, and other automotive stuff, but not springs. Some day I'll remove my springs and rate check them to get exact numbers, but that will require teardown which I don't feel like doing right now.