how to figure backspacing?

yota85red · 12-30-2009, 08:52 AM

This may help--> https://www.rsracing.com/tech-wheel.html

KennyTJ · 12-31-2009, 03:21 AM

Add 1" to the rim width for the weld on beadlock. This is what I have gotten with both TSL "SX" and IROKs on weldon's. So an 8" rim becomes 9", a 9" becomes a 10" well you get the picture.

So just subtract the amount of space you need on the front side (the hub length) in your case 5.25 inches. So 8" rim + 1" for weld on beadlock - 5.25 font space required = 3.75" BS
If you start with a 9" rim you can do 4.75" BS

I would take off an extra 1/4" so the hub is inside and protected from rocks, so 3.5"BS for an 8" rim.
I have 8" eaton steelies with 3.25" BS that I did weld on beadlocks and the hubs are nice and protected.

blazerbrad · 12-31-2009, 02:17 PM

The above information is correct. Subtract the BS from the total wheel width and that gives you the measurement from the WMS (where the lugs are) to the other lip of the rim.

However, unless you buy custom wheels at a premium price you don't have much of a choice when it comes to off the shelf wheels. I went through this a couple of years ago when thinking about going to 17" wheels but there was only one BS available that I could find on 17x8 wheels and that was 4.5" which would definitely make a locking hub or flange on a D60 stick out. I could special order a set of wheels from Summit that only had 3.5" BS but it almost doubled the price, and other than that it was going with some other company for even more money. Just couldn't bring myself to pay the extra money.

mckeddie · 12-31-2009, 05:02 PM

i'm willing to pay a little extra, the 3.5'' backspaced aren't too much more, like $25 or so i think. i've figured i'm going to narrow this thing up close to a foot with the new wheels and tires, so i'm pretty excited to finally be able to fit down the trails again. picking my krawlers up sunday, it's like christmas all over to me again.

12-31-2009, 05:02 PM	#4
mckeddie Join Date: Apr 2007 Location: van wert oh Posts: 583	i'm willing to pay a little extra, the 3.5'' backspaced aren't too much more, like $25 or so i think. i've figured i'm going to narrow this thing up close to a foot with the new wheels and tires, so i'm pretty excited to finally be able to fit down the trails again. picking my krawlers up sunday, it's like christmas all over to me again. __________________ zuk buggy.....it'll be a jeep eventually.

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

12-30-2009, 08:52 AM	#1
yota85red Join Date: Sep 2008 Location: McArthur OH, Posts: 7	This may help--> https://www.rsracing.com/tech-wheel.html

12-31-2009, 03:21 AM	#2
KennyTJ The Pirate Join Date: Oct 2007 Location: Lebanon, Oh. Posts: 297	Add 1" to the rim width for the weld on beadlock. This is what I have gotten with both TSL "SX" and IROKs on weldon's. So an 8" rim becomes 9", a 9" becomes a 10" well you get the picture. So just subtract the amount of space you need on the front side (the hub length) in your case 5.25 inches. So 8" rim + 1" for weld on beadlock - 5.25 font space required = 3.75" BS If you start with a 9" rim you can do 4.75" BS I would take off an extra 1/4" so the hub is inside and protected from rocks, so 3.5"BS for an 8" rim. I have 8" eaton steelies with 3.25" BS that I did weld on beadlocks and the hubs are nice and protected.

12-31-2009, 02:17 PM	#3
blazerbrad - CORE Member - Join Date: Feb 2007 Posts: 831 Images: 6	The above information is correct. Subtract the BS from the total wheel width and that gives you the measurement from the WMS (where the lugs are) to the other lip of the rim. However, unless you buy custom wheels at a premium price you don't have much of a choice when it comes to off the shelf wheels. I went through this a couple of years ago when thinking about going to 17" wheels but there was only one BS available that I could find on 17x8 wheels and that was 4.5" which would definitely make a locking hub or flange on a D60 stick out. I could special order a set of wheels from Summit that only had 3.5" BS but it almost doubled the price, and other than that it was going with some other company for even more money. Just couldn't bring myself to pay the extra money.