Wheel Spacers
09-17-2011, 02:24 PM
#3
I think this was the link someone gave in another thread (might have been scion202) http://www.phantasmusa.com/ws5511460c.html
09-18-2011, 07:43 PM
#9
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Join Date: Aug 2011
Location: Dallas, Texas
Posts: 43
Some people do not like wheel spacers because back in the day they were very dangerous to use. Alot of sheared studs or wheels separating from the vehicle. I have used wheel spacers before on a truck that I would take off road and had zero issues. They just need to be the proper type for your vehicle. I think the ones our cars use are hub centric. I will say use at your own risk and ensure they are properly installed and set to the proper torque specs.
09-18-2011, 08:22 PM
#10
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Location: Nashua, NH
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09-19-2011, 03:41 AM
#11
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Last edited by 2tCornot2tC; 09-19-2011 at 11:36 AM. Reason: fixed hyperlink
09-19-2011, 06:40 AM
#12
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Where is my math/reasoning wrong?
7.5 inch wheel = 19.05 cm
center line = 9.525 cm
with offset of 39; 5.625 cm of wheel extend out from the hub and 13.424cm goes towards the car.
SO:
5.625/19.05 *100 = 29.528% of the wheel width extends out from the hub. So in order to keep all the forces equal, wouldn't you want that ratio to stay the same???
yours now:
9" = 22.86
center line: 11.43cm
with offset of 40; 7.43cm extends out from the hub
so 7.43/22.86 *100 = 32.502% extends out from the hub
7.5 inch wheel = 19.05 cm
center line = 9.525 cm
with offset of 39; 5.625 cm of wheel extend out from the hub and 13.424cm goes towards the car.
SO:
5.625/19.05 *100 = 29.528% of the wheel width extends out from the hub. So in order to keep all the forces equal, wouldn't you want that ratio to stay the same???
yours now:
9" = 22.86
center line: 11.43cm
with offset of 40; 7.43cm extends out from the hub
so 7.43/22.86 *100 = 32.502% extends out from the hub
09-19-2011, 11:48 AM
#13
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You are correct…but, the performance/handling of your vehicle and the loads that go through your suspension all go through the centerline (weather it is a tire, wheel or suspension component) therefore the “ET” is the most critical measurement on a wheel. The amount of wheel inside the mounting face is a reference for suspension and wheel well clearances and the amount of wheel outside of the mounting face is a reference for fender clearance. Yes, you have to check those clearances, but you design to the centerline. Unless you are capable of making some very major changes to the suspension design, do not change the “ET” of the wheel...a wheel spacer does that.
Check here https://www.scionlife.com/forums/sho...d.php?t=206561 to see what pivot radius is in the sketch of post #8...that, you wnat to keep at zero.
Check here https://www.scionlife.com/forums/sho...d.php?t=206561 to see what pivot radius is in the sketch of post #8...that, you wnat to keep at zero.
Last edited by 2tCornot2tC; 09-19-2011 at 12:59 PM. Reason: added suspension geometry
09-19-2011, 05:29 PM
#15
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Hard to say without having the complete design…it’s like asking, would placing the crowbar on the inside be worse or using the crowbar on the outside be worse. You are still using a crowbar. Spacing the wheels (offset) is the crowbar…small (short), but your loads are large (weight of the car).
11-14-2012, 03:32 PM
#20
dont mean to highjack this tread but i didnt want to start a whole other one just for this question lol ... i am on trd springs and trd 19 inch wheels and am going to buy spacers soon i will be getting 15 mm bolt on for the front and 22 mm for the rear .. will i have to shave down the oem studs ???!!!! or