No offense but I dont have any idea what you are meaning.
I definitely meant diameter i have never seen or heard 2.25" lenght springs. I think that even helper springs are at least something like 3" long.
2.25" spring might be bit too short for me .
I need to get coil sleeves and make the short stroke struts first and then measure and estimate my spring needs. All i wanted to know was that would it be wiser to get 2.25" I.D. sleeves or 2.5" I.D. refering to srpring prices, availability, multi types of springs and are there any unknown factors in characteristics(to me). For example it feels like 2.5" might be more progressive due to larger coil diameter(propably isnt ).