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      08-27-2011, 12:42 PM   #1
Dave07997S
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Thinking of widening a rear set of 10" wide ZCP wheels

by 1" on the inner rim, how would this affect offset?

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      08-27-2011, 01:22 PM   #2
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If you are adding 1" inboard of centerline, wouldn't that have the effect of adding 25mm to offset?
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      08-27-2011, 01:59 PM   #3
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I would sell them and buy a set of aftermarket wider wheels.
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      08-27-2011, 02:41 PM   #4
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I would sell them and buy a set of aftermarket wider wheels.
+1

Get rid of factory 10" wide wheel and buy a properly engineered 11" wide wheel.
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      08-27-2011, 03:22 PM   #5
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There is nothing wrong with widening wheels as long as its done properly. I have had a set of wheels that I tracked with that was widened as do alot of other people with no issues.

Now can someone give me an answer to the original question...where's Malek?

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      08-27-2011, 10:37 PM   #6
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Curious how they do this? Add 1" to the barrel?
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      08-28-2011, 12:01 AM   #7
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Curious how they do this? Add 1" to the barrel?
http://www.weldcraftwheels.com/index-1.html

I've used them before, Malek turned me on to someone local in S.Cali.

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      08-28-2011, 05:27 AM   #8
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I am curious what you will be paying for this.
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      08-28-2011, 10:54 AM   #9
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Quote:
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Quote:
Originally Posted by signes View Post
Curious how they do this? Add 1" to the barrel?
http://www.weldcraftwheels.com/index-1.html

I've used them before, Malek turned me on to someone local in S.Cali.

Dave
interesting, thanks. Would have thought there would be structural issues but guess that isn't the case in your experience. Let us know how it turns out.
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      08-28-2011, 01:32 PM   #10
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Hey guys i figured since you are on the topic.

They are oem 19x10 comp wheels with 1 in added after i got them back more like 1in 1/4. Rears have 12mm spacer with 295-30-19. Fronts are stock rear comp wheels 19x10 with stock 265-35-19. I currently have 275-30 19 in transit for the fronts to even it out.
sorry for the crappy pics. I took them in the garage while the hurricane was going on,
As you can see in the pic the wheels where done so well they only needed that one little weight to balance the wheel.
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      08-28-2011, 01:35 PM   #11
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Hey guys i figured since you are on the topic.

They are oem 19x10 comp wheels with 1 in added after i got them back more like 1in 1/4. Rears have 12mm spacer with 295-30-19. Fronts are stock rear comp wheels 19x10 with stock 265-35-19. I currently have 275-30 19 in transit for the fronts to even it out.
sorry for the crappy pics. I took them in the garage while the hurricane was going on,
As you can see in the pic the wheels where done so well they only needed that one little weight to balance the wheel.


Thanks big guy...who did the wheels? Weldcraft? They did mine on a 98 Mustang Cobra I owned. Malek turned me on to someone more local, its just that Weldcraft has been doing this for years.

I will be going down the same road or a set of Forgestar F14s in 19x10 and 19x11. Any idea in how much weight it added? Also no rubbing even with the 12mm spacer and 295's??

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      08-28-2011, 02:00 PM   #12
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Quote:
Originally Posted by Dave07997S View Post
Thanks big guy...who did the wheels? Weldcraft? They did mine on a 98 Mustang Cobra I owned. Malek turned me on to someone more local, its just that Weldcraft has been doing this for years.

I will be going down the same road or a set of Forgestar F14s in 19x10 and 19x11. Any idea in how much weight it added? Also no rubbing even with the 12mm spacer and 295's??

Dave
I used a shop near me who has been doing wheel work since 1976. Wheel works in Burlington NJ. As far as weight i cant say how much but i can say it didn't add to much when i had them in my hands. I did have a slight rub on the inner fender where the bumper and fender meet it bumps out on the inside. I warmed it up with a heat gun and pushed it in a little. Since then its been good.
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      08-29-2011, 05:50 AM   #13
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If you add 1" to the inside edge (inner "barrel") of the ZCP 10" wide rear wheel, you'd change the wheel from a 10" ET25 to an 11" ET38 (actually 37.7).
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      08-29-2011, 09:56 AM   #14
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Hi dave. I tried call you back a couple times, but couldn't reach you at the office. PM me your cell. I'll call you today.
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      04-30-2012, 10:49 PM   #15
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Dave,
Any updates on this?
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      04-30-2012, 10:57 PM   #16
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Some just looks for ways to have a wheel fail.. This is analogous to cutting springs for lower ride height..unsafe imo. Buying a properly made correct sized wheel is clearly the better option
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      04-30-2012, 11:04 PM   #17
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Quote:
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Some just looks for ways to have a wheel fail.. This is analogous to cutting springs for lower ride height..unsafe imo. Buying a properly made correct sized wheel is clearly the better option


this has been being done for a long time w/ no issues. Done properly it's a good idea. I remember all ther supra guys doing it for slicks back in the day.
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      05-01-2012, 01:32 AM   #18
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Dave,
Any updates on this?
Haven't done it yet...not that Im worried about failing its just I may want a lighter wheel. I'm probably leaning toward a set of Forgestars in 19X10 ET25 and 19X11 ET33s. With Mich PSS in 275/30/19 and 295/30/10 the weight won't be that far off the OEM ZCP wheels and tires but with 30mm more width per tire.

Its just that I love the look of the OEM ZCP wheel.


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      05-01-2012, 01:51 AM   #19
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Quote:
Originally Posted by Dave07997S View Post
by 1" on the inner rim, how would this affect offset?

Dave
Offset is the distance from the center of the wheel to the mounting face.

Widen the wheel = you are relocating the center of the wheel to a new position = its distance to the mounting face changes = you are changing offset.

You'll end up with a 19x11 ET37.5ish.

In any case measure and make sure you have have an extra 1in/25mm to spare on the inside. Maybe a little more to take into account the tire.

And since the wheel is somewhat sunken into the fender (outer clearance doesn't change) you might want to run a spacer to bring it out and gain clearance on the inside.
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      05-01-2012, 02:13 AM   #20
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Quote:
Originally Posted by Dave07997S View Post
Haven't done it yet...not that Im worried about failing its just I may want a lighter wheel. I'm probably leaning toward a set of Forgestars in 19X10 ET25 and 19X11 ET33s. With Mich PSS in 275/30/19 and 295/30/10 the weight won't be that far off the OEM ZCP wheels and tires but with 30mm more width per tire.

Its just that I love the look of the OEM ZCP wheel.


Dave
I also wanted to get my wheel widened as well. Anyways, keep us updated on this one Dave!


Quote:
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Offset is the distance from the center of the wheel to the mounting face.

Widen the wheel = you are relocating the center of the wheel to a new position = its distance to the mounting face changes = you are changing offset.

You'll end up with a 19x11 ET37.5ish.

In any case measure and make sure you have have an extra 1in/25mm to spare on the inside. Maybe a little more to take into account the tire.

And since the wheel is somewhat sunken into the fender (outer clearance doesn't change) you might want to run a spacer to bring it out and gain clearance on the inside.
^^^Good info.^^^ Thanks!
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      05-01-2012, 03:07 AM   #21
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gosh....not to be a downer here, but that looks like structural failure waiting to happen. Seems kinda dangerous to have welds consistently bearing rotational loads.
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      05-01-2012, 05:17 AM   #22
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Quote:
Originally Posted by dbarnes View Post
+1

Get rid of factory 10" wide wheel and buy a properly engineered 11" wide wheel.
+1

Quote:
Originally Posted by SROC3 View Post
gosh....not to be a downer here, but that looks like structural failure waiting to happen. Seems kinda dangerous to have welds consistently bearing rotational loads.
+2
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