Wheel Offset
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2nd Gear
Joined: Feb 2005
Posts: 2
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Wheel Offset
WHEEL OFFSET (Complete illustration with all the measures with tires)-test your tire+wheel configuration here (have to use IE):
http://www.rims-n-tires.com/info_spe...rw1=8.0&et1=10
http://www.rims-n-tires.com/info_spe...rw1=8.0&et1=10
4th Gear
Joined: Feb 2005
Posts: 4
Likes: 0
From: Etobicoke, Ontario
that calculator rocks! i'm trying to decide on 17x8 rims for my totally stock 99TL and the whole offset issue has me confused. if the stock 16x6.5 rims are +55 that's 150mm of backspace, so a 17x8 rim with a +40 offset has 154mm of backspace, which should juuust fit. the street side gets an extra 38mm. i don't see a problem with this, does anyone think this is a bad idea? i might drop about an inch of springs in the near future, should i expect some rim work to make the 17x8's fit?
Drifting
Joined: Apr 2001
Posts: 2,272
Likes: 1
From: soCAL
firstly, are your numbers correct? according to my manual calculations, the stock wheel has 137.55mm (or 5.41") of BS. basically, half of the rim width plus the offset value. half of the rim is 3.25" or 82.55mm. the offset is 55mm or 2.16" . the problem with this website is that they round to the tenths and that is bad!!!
by preserving the BS, all of the extra width will fall in front of the rotor hub. if this width is bigger than the distance between the rotor hub and the fender lip, you are going to rub. actually, the positioning of the stock wheel is at neither end of the spectrum so using either value obtained from the stock wheel is not going to help. what you really need to do is to remove the wheel and measure two distances directly taken from the car: 1) fender lip to the rotor hub and 2) fender lip to the back of the wheel well or part of the suspension that sticks outward the most. from these two items, you will know what offset you need. an important note when measuring, stay on the conservative side because the tire is usually wider than the rim so you will have to account for this.
by preserving the BS, all of the extra width will fall in front of the rotor hub. if this width is bigger than the distance between the rotor hub and the fender lip, you are going to rub. actually, the positioning of the stock wheel is at neither end of the spectrum so using either value obtained from the stock wheel is not going to help. what you really need to do is to remove the wheel and measure two distances directly taken from the car: 1) fender lip to the rotor hub and 2) fender lip to the back of the wheel well or part of the suspension that sticks outward the most. from these two items, you will know what offset you need. an important note when measuring, stay on the conservative side because the tire is usually wider than the rim so you will have to account for this.
2nd Gear
Joined: May 2004
Posts: 2
Likes: 0
From: Fayetteville, AR
03 TLS moving from stock to 17x8 Chrome 04 TL rims
I too have been to the great link listed below and used their calc to look at replacing 215/50/17x6.5 (55 offset) with an 04 OEM chromed 17x8 -(offset unkown if anyone can help)-- according to this calculator, I also need a 40mm offset in this new rim does that sound right ? I would take the tires to 235/45/17 and gain an inch of contact at each of the corners....
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nuldabz
3G TL Tires, Wheels & Suspension
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Sep 3, 2015 05:49 PM
