OK so i was tearing apart some 17" wheels for a customer and decided to take some pics to show you gals&guys actual fitments to the strut....
i'm using spacers of 5mm, 6mm, 5mm, 6mm to show the change in offset in relation to the change in strut clearance. i'll also give rough comparables to other widths/offsets that would have the same clearance to the strut!
the static info:
spacers are used in a 5,6,5,6 pattern
OEM strut
SVT knuckle
new hubs&bearings
KVR rotor (i'll get a hat thickness later)
So this first wheel is a 17x8 50et with a 6.53"(165.85mm) backspacing and a 9/16" or 14.25mm thick inner
[email protected] bead:
same wheel now a 45et(160.85mm):
same wheel now a 39et(154.85mm):
same wheel now a 34et(149.85mm):
same wheel now a 28et(143.85mm):
this is a 17x7 45et with a 5.83"(148.15mm)backspacing and the same 9/16" or 14.25mm thick lip:
same wheel as a 40et(143.15mm):
same wheel as a 34et(137.15mm):
same wheel as a 29et(132.15mm):
same wheel as a 23et(126.15mm):
So all things being equal(like lip thickness @ the bead), a:
17x9 20et with a 5.84"(148.55mm)BS will have a similar strut clearance to a 17x7 45et with a 5.83"(148.15mm)BS
17x9 30et with a 6.24"(158.55mm)BS will have a similar strut clearance to a 17x8 ~43et with a 158.85mm BS or a 17x7 55et
****THINGS TO CONSIDER****
- remember these are 17" wheels.
- these offsets and BS numbers will not transfer directly to 15s,16s or 18s because all have different diameters and thus will have slightly more clearance(18s) or less(15s&16s) respectively as that diameter increases or decreases.
- i added my lip thicknesses so you can remove them from YOUR calculations to figure out your exact fitment by adding in you lip thickness in their place
- these are STOCK struts, aftermarket struts and coilover bodies will be different! please measure the diameter of your struts, divide by 2 and then minus the thickness of the stock struts(i'll get this for everyone tonight or tomorrow) from that number... this will give you the difference you should factor into your calculations!
most importantly this is how you figure it all out:
- Basic math, BS:
wheel width in " x 25.4mm = wheel width in mm / by 2 = centerline of wheel + offset in mm = BS without lip thickness in mm + lip thickness in mm = actual BS in mm / by 25.4mm = BS in "
- Basic math, FS(front spacing, usefull if you are changing lips on multipiece wheels where the BS will stay the same):
wheel width in " x 25.4mm = wheel width in mm / by 2 = centerline of wheel + offset in mm = BS without lip thickness in mm - wheel width in mm = front spacing without lip thickness + OUTER lip thickness in mm = actual FS(front spacing) / by 25.4mm = FS in "
- To figure out your BS and Offset:
put a yard stick across the back side of the wheel and measure down to the wheel hub = BS x 25.4mm = BS in mm - inner lip thickness in mm = BS in mm without lip thickness. Now do you basic BS calculation to figure out the center line of the wheel and minus that from your BS without lip thickness to get your offset!
:thumbup: