986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - M030 ROW spring rates vs various aftermarket options

brp987 · 06-18-2011, 07:24 PM

'01 S on Eibachs before ROW M030 install.

ground to fender: front: 24 3/4 inch, rear: 25 inch

coil wire diameter at bottom:
'01S (stock): 0.514 inch; Eibach: 0.514 inch; ROW M030: 0.545

Apparently, spring rate varies as 4th power of wire diameter, which according to my math makes the row M030 26% stiffer than what was stock on my car.

I'll try to post pics, but this is my first try so it probably won't work.

06-18-2011, 07:24 PM	#9
brp987 Registered User Join Date: Mar 2007 Location: los angeles Posts: 195	'01 S on Eibachs before ROW M030 install. ground to fender: front: 24 3/4 inch, rear: 25 inch coil wire diameter at bottom: '01S (stock): 0.514 inch; Eibach: 0.514 inch; ROW M030: 0.545 Apparently, spring rate varies as 4th power of wire diameter, which according to my math makes the row M030 26% stiffer than what was stock on my car. I'll try to post pics, but this is my first try so it probably won't work.