GS 50mm offset = ? backspacing
Thread Starter
Racer
Joined: Mar 2004
Posts: 304
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From: Littleton MA
GS 50mm offset = ? backspacing
At the risk of being redundant I will ask anyway. I am currently looking at a set of ARE Hopster wheels for my 90 vette. 17x9.5 front and 17x11 rear. ARE does not list offset in the custom sizes ( 17x11 being one of them ) and lists backspacing of 8". Is this equal to the GS 50mm offset or more or less. IE I dont want them sticking out past the fenderwells ( well a 1/4 inch is ok ) Is the GS offset 7.5 inchs of backspacing? 7.75, 8, 8.25 etc. Anyone know exactly? Thanks in advance 
BTW: I have my Torque Thrust IIs ( all 4 are 17x9.5 ) listed in the C4 for sale section with like new tires. All mint.
BTW: I have my Torque Thrust IIs ( all 4 are 17x9.5 ) listed in the C4 for sale section with like new tires. All mint.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
take your existing TT3s.
Lay a straight edge over the outer rim edge, on the inside of the wheel. Then drop a ruler onto the hub and measure. THAT'S backspacing.
Offset is a little harder to measure... that is measured from the exact vertical center of the wheel... and the negative is if the offset is to the outside and positive is if the offset is to the inside.
Lay a straight edge over the outer rim edge, on the inside of the wheel. Then drop a ruler onto the hub and measure. THAT'S backspacing.
Offset is a little harder to measure... that is measured from the exact vertical center of the wheel... and the negative is if the offset is to the outside and positive is if the offset is to the inside.
Thread Starter
Racer
Joined: Mar 2004
Posts: 304
Likes: 0
From: Littleton MA
Originally Posted by bogus
take your existing TT3s.
Lay a straight edge over the outer rim edge, on the inside of the wheel. Then drop a ruler onto the hub and measure. THAT'S backspacing.
Offset is a little harder to measure... that is measured from the exact vertical center of the wheel... and the negative is if the offset is to the outside and positive is if the offset is to the inside.
Lay a straight edge over the outer rim edge, on the inside of the wheel. Then drop a ruler onto the hub and measure. THAT'S backspacing.
Offset is a little harder to measure... that is measured from the exact vertical center of the wheel... and the negative is if the offset is to the outside and positive is if the offset is to the inside.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Originally Posted by Hairmetal_still_rox!
Thanks for the info although I indeed already knew how to measure backspacing. That is why I was trying to relate it to the 50mm offset that the GS calls out as. Do you know what the backspacing is on the gs 50mm offset wheels are? Thanks for your comments
Thread Starter
Racer
Joined: Mar 2004
Posts: 304
Likes: 0
From: Littleton MA
Originally Posted by bogus
I didn't know that... and I didn't have the number, so, much like teaching a man to fish....
e same
