Not sure of the size, but that sounds about right. In '06 Ford did change the strut & the spindle diameter. For '05 Ford changed the ball joint size to a slightly bigger one. Making the '05 spindle different then the others. So the earlier suspension kits fit '00-'05 cars & are more popular then the '06-'11 kits. Seems like when Ford changed the diameter, the suspension manufactors didn't follow suit. So you having a '07 & want to change out your struts & springs to a earlier kit, you'll need to get a pr of '05 only spindles or hit up Karl @ Massive performance to get his "Omni kit''= sleeves that take up the clearence of the bigger diameter spindle & a earlier smaller diameter strut. Just to add, the early & later springs & struts don't interchange= no mix & matching. The later spring have a pigtail on the bottom & the later struts have a platform to except the pigtail. Hope that helps you. Felixthecat[thankyou]