I have 100% for sure 4,0 springs and they got just same specs than your springs. Difference between 4,2 and 4,5 springs is number of the coils, but I can't remember how many coils they have (I didn't have 4,5 springs right now and 4,2 springs are in my forks)
4/4,4 and 4,2/4,6 spring rates in this table are interesting... I've been wondering that before. Both of the springs have own code. Maybe they are progressive springs? Anybody know...?
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