Hulk wheels on a JK
Thread Starter
JK Newbie
Joined: Oct 2007
Posts: 92
Likes: 0
From: Keene, NH
Hulk wheels on a JK
Okay I have seen some Hulk (commander) wheels on a JK. My question is ... the Hulk wheel has a 50mm off set (whats the difference between off set and back spacing?) ... does this mean I would need wheel spacers? Most after market rims are 4.5" back spacing . So how are people making these work?
JK Super Freak
Joined: Sep 2007
Posts: 1,623
Likes: 5
From: Lawrenceville, NJ
Back spacing and offset are related, but different.
Back spacing is the distance from the inboard most flange lip to the hub mounting face...so that the MORE BS, the tighter into the wheel well the rim is tucked (More BS = Deeper dish facing the brakes, etc)
Less backspacing is the same as adding a spacer...so less BS means the rim sticks out further outboard.
Offset is relative to THE CENTERLINE of the rim, not to the inboard flange...
The problem with only knowing ONE measurement, is that offset changes relative to rim width, and BS doesn't.
So, 50 mm = almost 2". That's 2" off of the centerline of the rim. After moving 2" from the centerline of the rim, the wider the rim, the further the distance to a flange on one side, and the closer it is on the other side's flange, etc.
An OEM 7.5" rim is 8.5" wide (They don't count the flanges when naming nominal rim widths...) so a zero offset would be the same as a 4.25" BS.
I don't know the rim width on the Hulk rim...but, using the above, you could calculate the BS, just remember to an an inch to the stated "rim width" when dividing in half to find zero offset....etc.
Back spacing is the distance from the inboard most flange lip to the hub mounting face...so that the MORE BS, the tighter into the wheel well the rim is tucked (More BS = Deeper dish facing the brakes, etc)
Less backspacing is the same as adding a spacer...so less BS means the rim sticks out further outboard.
Offset is relative to THE CENTERLINE of the rim, not to the inboard flange...
The problem with only knowing ONE measurement, is that offset changes relative to rim width, and BS doesn't.
So, 50 mm = almost 2". That's 2" off of the centerline of the rim. After moving 2" from the centerline of the rim, the wider the rim, the further the distance to a flange on one side, and the closer it is on the other side's flange, etc.
An OEM 7.5" rim is 8.5" wide (They don't count the flanges when naming nominal rim widths...) so a zero offset would be the same as a 4.25" BS.
I don't know the rim width on the Hulk rim...but, using the above, you could calculate the BS, just remember to an an inch to the stated "rim width" when dividing in half to find zero offset....etc.
Thread Starter
JK Newbie
Joined: Oct 2007
Posts: 92
Likes: 0
From: Keene, NH
Thread Starter
JK Newbie
Joined: Oct 2007
Posts: 92
Likes: 0
From: Keene, NH
Back spacing and offset are related, but different.
Back spacing is the distance from the inboard most flange lip to the hub mounting face...so that the MORE BS, the tighter into the wheel well the rim is tucked (More BS = Deeper dish facing the brakes, etc)
Less backspacing is the same as adding a spacer...so less BS means the rim sticks out further outboard.
Offset is relative to THE CENTERLINE of the rim, not to the inboard flange...
The problem with only knowing ONE measurement, is that offset changes relative to rim width, and BS doesn't.
So, 50 mm = almost 2". That's 2" off of the centerline of the rim. After moving 2" from the centerline of the rim, the wider the rim, the further the distance to a flange on one side, and the closer it is on the other side's flange, etc.
An OEM 7.5" rim is 8.5" wide (They don't count the flanges when naming nominal rim widths...) so a zero offset would be the same as a 4.25" BS.
I don't know the rim width on the Hulk rim...but, using the above, you could calculate the BS, just remember to an an inch to the stated "rim width" when dividing in half to find zero offset....etc.
Back spacing is the distance from the inboard most flange lip to the hub mounting face...so that the MORE BS, the tighter into the wheel well the rim is tucked (More BS = Deeper dish facing the brakes, etc)
Less backspacing is the same as adding a spacer...so less BS means the rim sticks out further outboard.
Offset is relative to THE CENTERLINE of the rim, not to the inboard flange...
The problem with only knowing ONE measurement, is that offset changes relative to rim width, and BS doesn't.
So, 50 mm = almost 2". That's 2" off of the centerline of the rim. After moving 2" from the centerline of the rim, the wider the rim, the further the distance to a flange on one side, and the closer it is on the other side's flange, etc.
An OEM 7.5" rim is 8.5" wide (They don't count the flanges when naming nominal rim widths...) so a zero offset would be the same as a 4.25" BS.
I don't know the rim width on the Hulk rim...but, using the above, you could calculate the BS, just remember to an an inch to the stated "rim width" when dividing in half to find zero offset....etc.
So this is the info I have on the Hulk wheel.
17 x 7.5" / 50mm offset
So back spacing on that wheel would only be 2.25" ?? that doesnt seem right ..
