Wheel Specs?
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I can help a little
Offset: 18.5
Lug spacing: 5 x 115
Offset: 18.5
Lug spacing: 5 x 115
Thanks!
Thanks, I have been familiar with offset for years, but seems only in recent years is the term "backspacing" coming into play (does this refer to how deep dish the wheel is?).
So I really didn't know what that was or how to measure it.
Just wanted to make sure the aftermarket wheels I'm looking at will look good and fit properly without rubbing issues.
So I really didn't know what that was or how to measure it.
Just wanted to make sure the aftermarket wheels I'm looking at will look good and fit properly without rubbing issues.
OK, I've researched a bit more.
this backspacing and offset thing seem to be two ways of finding out the EXACT same information. So why did they start to talk "backspacing" in the past couple years.
Backspacing is the distance from the back of the wheel to the back of the mounting hub
Offset, as has been the standard forever, is the distance in millimeters OUTWARD or INWARD from centerline of the wheel to the mounting hub.
So to me, what's the point of measuring backspacing, it just causes confusion, and here's a perfect example.
I'm looking at wheels for the Hellcat that will look aggressive and not "cheesy aftermarket looking" so I can take off and store the forged OEM wheels, so if/when it comes time to sell the Hellcat, the OEM wheels will be immaculate, adding to the value of the car.
I'm also wanting to find 20x10 wheels so if I decide to put 305's on the car, it's within the recommended rim size and I don't have to worry about ballooning or anything putting 305's on a 9.5 inch wide wheel.
The wheel I am looking at is a
20 x 10
says it has a offset of 25 mm
Which is perfect compared to stock. Wheel won't stick out any further than current OEM wheel, but actually the face of the wheel will sit inward a measly 1 millimeter, but because the wheel is 1/2 wider the additional 1/2 inch is all on the inside, meaning it's wider inward toward the suspension and tucking under the wheel wells.
However, this same wheel says it has a backspacing of 6.50"
Well, how in the heck can it have a 6.50" backspacing but have an offset of 25mm from the centerline of the wheel. There is a 1/2 inch discrepancy there.
So either the wheel has a 25 mm offset and a 6.00 inch backspacing or
the wheel has a 6.50" backspacing or a roughly 38 mm offset
So unless I'm missing something with this backspacing stuff, I don't know which to believe on this wheel.???
this backspacing and offset thing seem to be two ways of finding out the EXACT same information. So why did they start to talk "backspacing" in the past couple years.
Backspacing is the distance from the back of the wheel to the back of the mounting hub
Offset, as has been the standard forever, is the distance in millimeters OUTWARD or INWARD from centerline of the wheel to the mounting hub.
So to me, what's the point of measuring backspacing, it just causes confusion, and here's a perfect example.
I'm looking at wheels for the Hellcat that will look aggressive and not "cheesy aftermarket looking" so I can take off and store the forged OEM wheels, so if/when it comes time to sell the Hellcat, the OEM wheels will be immaculate, adding to the value of the car.
I'm also wanting to find 20x10 wheels so if I decide to put 305's on the car, it's within the recommended rim size and I don't have to worry about ballooning or anything putting 305's on a 9.5 inch wide wheel.
The wheel I am looking at is a
20 x 10
says it has a offset of 25 mm
Which is perfect compared to stock. Wheel won't stick out any further than current OEM wheel, but actually the face of the wheel will sit inward a measly 1 millimeter, but because the wheel is 1/2 wider the additional 1/2 inch is all on the inside, meaning it's wider inward toward the suspension and tucking under the wheel wells.
However, this same wheel says it has a backspacing of 6.50"
Well, how in the heck can it have a 6.50" backspacing but have an offset of 25mm from the centerline of the wheel. There is a 1/2 inch discrepancy there.
So either the wheel has a 25 mm offset and a 6.00 inch backspacing or
the wheel has a 6.50" backspacing or a roughly 38 mm offset
So unless I'm missing something with this backspacing stuff, I don't know which to believe on this wheel.???
^ I am with ya. Let me guess that is the Bravado site? If so I agree those numbers are so strange I moved on. I am at about at my wits end. I have been shopping for three hours for ANY manufacturer that offers anything not custom in a 9.5" front and a 11" rear that works! I think I have changed my mind, may want black and not chrome but I can't find anything that works at least off the shelf. I know those Bravado's works because there is a thread where a member used them. I have a question or two out on email now.
FYI, I do think that 25 mm may be close to the magic rear offset for an 11". We know a 21mm offset works with a 315, because that is the Bravado thread. I am about to pull the trigger, but can't find anything to buy!!
FYI, I do think that 25 mm may be close to the magic rear offset for an 11". We know a 21mm offset works with a 315, because that is the Bravado thread. I am about to pull the trigger, but can't find anything to buy!!
No it wasn't the Bravado, but I did JUST see that thread and looked at them.
I wouldn't want 20 x 11's
I saw that coldheartid went with them, and they stick out to far for my tastes.
If they made them in 20 x 10.5 that would be better. Even 20 x 10's.
My thing is, I don't want wheels that have an offset that makes them stick OUT from under the wheel well any further than the stock ones.
I'd like wheels that are 1/2 to 1 inch wider, but basically all of that width inside under the wheel well.
So the more positive offset the more it sets back into the car. I have the 305's mounted up. Keeping the same offset at 18.5 mm with a wider wheel keeps the tire in the same realitive place. Notice that there is 5/8" distance from the face of the 9.5" wheel to the outside edge of a 305. Coldheartid has a 21mm offset, shifting it in just a bit. He reports even with those huge 325's he still has some room at the critical spot inside. I think I am going to go with 305 rears. So IMO a 25mm offset will work with either a 10.5 or an 11" and tuck the package in as far as we dare. On the backs only now.
A wider wheel with the same offset as stock will push your wheel outside of the body, 1" wider with same offset means 1/2" of wheel outwards, if you go 1" wider and want the wheel in the same location as stock your offset should be around 31mm
My issue is that we need 315/35/20 tires to have the same overall outside diameter of the stock 275/40/20 tires.
305/35/20's make the tire 2.2% smaller. This means a smaller sidewall and bigger wheel well gap. To most they won't notice, but on your own car, the tire looks short. Further, this lowers the final drive ratio, which means it spins easier. So though you will have more tire on the road, the tires are going to turn 2.2% faster (and therefore harder, which means more tire spin).
Ideally, we have 315 tires. Even more grip (tire on the road) and the same overall diameter so we can launch harder when needed and less chance of tire spin, if going say, 40 mph and you get hard into the throttle.
Issue for me is, 315 size tires are "recommended" on 10.5 inch or wider wheels, which there aren't many of, with an offset of around 30 mm, so they don't stick out any further than what our stock wheels do now.
305's are ok for 10 inch wide wheels
295/40 tires would work best on 10 inch wide wheels, but here we give up some width of the tire on the road, but it's also a taller tire than stock, which means we raise the final drive ratio. This is good for being able to launch harder and keeping revs lower, but the issue is there is basically ZERO choices in 295/40 tires.
I just don't know why Dodge choose to put 9.5 inch wide wheels and 275 inch wide tires on the rear of this powerful of a car.
They SHOULD of just gone the staggered route.
And put 10.5 inch wide wheels with 315/35/20 tires on the rear, and all would be perfect.
But like what we are running into, they probably couldn't find a maker of staggered wheels that looked good, and they didn't want to pay for the R&D for a company to make them.
I believe we are saying the same thing, we but we are a critical 5mm apart in opinion. I personally have passed only a 5/8" short rod between a 305/35 on the OEM wheel and the tightest spot on the front side of the rears where the "rib" is. I will go 1/4" closer with a 25mm offset, but you are suggesting 1/2" closer. I would encourage you to double check clearance with a 30 mm offset no matter what size width wheel you choose. An 11" wheel, a 10.5" wheel and a 9.5" wheel all put the same size tire 1/2" closer to the inside with a +12mm offset change.
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