Wheel Spacer Thickness!

[Clint45]

Hi All,

Could someone tell me what thickness wheel spacers i need. For my IS200, To make standard wheels fill the arches please. Bolt on type wheel spacers

Thanks... :D

[J Henderson]

15mm front, 20mm rear. That's what is fitted to this car and it looks just about perfect.

[Mr.Rudus]

is your car not lowered ?

I would go with 10mm spacers all around. anything higher I feel tyres wear more quicker on lowered vehicle.

just my thoughts though -

[andyk134]

Ignoring tyre wear, if you just wanted to make it handle a little better what would you go for? If you did 10mm all round and went to 225 tyres would that help?

[Mr.Rudus]

yes that should help although the 225's are not always required.

[andyk134]

Really like the look of the car above so am going to go for the same with Eibach spacers, will post pics when done

[pierre_2zzge]

Easy to calculate by your self :outforcount:

Rear standard ET55 and 7,5inch wide plus 20mm spacer= ET 35

7,5inch = 190,5mm

190,5/2 = 95,25mm

95,25-35 = 60,25mm

Clearance to standard fender in the rear is 68mm, so you have almost a centimeter of clearance to your fender.

From my.is Forum.

Originally Posted by TeCKis300

Okay, here's the definitive guide to
all the wheel offset and fitment questions. Here's the real way to
figure out whether your wheels will fit!



EDIT: Thanks to NeoVB for this excellent link to help visualize wheel parameters - Wheel / tire size calculator / comparer - RIMS-N-TIRES



These limits are the practical extremes with good alignments. You can
buy more fender room with camber or rolling or pulling. In front, you
can buy more room with shorter overall tire diameter (<25") The
closer you get to these limits, the more likely you will need to stretch
a tire to fit the fender side. Drop does not determine what size wheels
fit. Put too aggressive a wheel, and one day, you WILL bend your
fender when you take the wrong turn with a good bump if you exceed these
limits.



Measuring in mm from the face of the hub:

Front fender limit: +65mm

Comments:

| +65 | Stretch tire and/or roll fender. Need fender liner mod. Do not exceed tire diameter of 25"

| +55 | Fender liner mod if going for a wide or tall tire. Do no exceed tire diameter of 25.2"

Front inner suspension upright limit: -155mm

Comments:

Need spacer if this number is exceeded. If close, do not use lip weights on wheels



Rear fender limit: +68mm

Rear fender limit w/ shaved lip: +75

Comments:

Need to stretch tire to a certain degree if very close to these numbers

Rear inner suspension coil lmit: -183mm

Comments:

Several factors matter as you approach this limit. You may need to
limit the amount of suspension travel. You may need to stretch tire.
And you cannot run as aggressive camber. I've been able to actually
scrub tire well before this limit (@ -175mm) with track cornering loads
on the spring and inner forward tub.



Equations to figure out wheel lip placement relative to limits:



Outer lip: (Wheel Width * 25.4) / 2 - Wheel Offset

Inner lip: (Wheel Width * 25.4) / 2 + Wheel Offset

Note: Inner lip is related to backspacing but backspacing takes into
consideration the wheel lip thickness, which is usually another 1/2" or
12.7mm.



Examples:

Front wheel size: 8.5" +45

Fender: 8.5 * 25.4 / 2 - 45 = 62.95 (< 65 - OK)

Suspension: 8.5 * 25.4 / 2 + 45 = 152.95 ( < 155 - OK)

Rear wheel size: 9.5" +55

Fender: 9.5 * 25.4 / 2 - 55 = 65.175 (< 68 - OK)

Suspension: 9.5 * 25.4 / 2 + 55 = 175.65 (< 190 - OK)