Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

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Czechmate68
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Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

#1

Post by Czechmate68 » 02 Dec 2019, 23:37

Well I finally pulled the trigger on some new tires and wheels for my cat. I picked up some of those Sumitomo' Mustang Unlim had for cheap. The HTR A/S P02 225/50V16.
And with Cyber Monday I bought Brand: American RacingStyle: AR105 Torq Thrust M
Size: 16x7
Bolt Pattern: 5x114.3 (5x4.5")
Offset: +35mmBackspacing: 5.38"(136.65mm)

So since all these numbers are new to me I am hoping to get some affirmative feedback on sizes and had a question on the back spacing number.
I ran these through a tire calculator and found that my new wheel back space is 12mms (.47")more than what the calculator shows it should be(124mm). My question is am I in trouble then with space on these? Or will there be some options to make them work? Hope that makes sense.

I haven't seen many using 16" rims so just wanted to know why that is too?

much thanks,
Last edited by Czechmate68 on 09 Dec 2019, 23:02, edited 1 time in total.
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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Czechmate68
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Re: 68 Rusto-Cat-Restoration - new Wheels & Tires

#2

Post by Czechmate68 » 03 Dec 2019, 00:05

Czechmate68 wrote:
02 Dec 2019, 23:37

Added pic.

Well I finally pulled the trigger on some new tires and wheels for my cat. I picked up some of those Sumitomo' Mustang U. had for cheap. The HTR A/S P02 225/50V16.
And with Cyber Monday I bought Brand: American RacingStyle: AR105 Torq Thrust MSize: 16x7Bolt Pattern: 5x114.3 (5x4.5")Offset: +35mmBackspacing: 5.38"(136.65mm)

So since all these numbers are new to me I am hoping to get some affirmative feedback on sizes and had a question on the back spacing number.
I ran these through a tire calculator and found that my new wheel back space is 12mms (.47")more than what the calculator shows it should be(124mm). My question is am I in trouble then with space on these? Or will there be some options to make them work? Hope that makes sense.

I haven't seen many using 16" rims so just wanted to know why that is too?

much thanks,
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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Czechmate68
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Re: Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

#3

Post by Czechmate68 » 09 Dec 2019, 23:09

I know this may not be the most exciting post but I am super excited as I have never purchased custom wheels before but I need some of that great Sage level knowledge I know is on here for guidance on this. This is my Christmas present to myself.

Much Thanks,
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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Re: Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

#4

Post by xr7g428 » 10 Dec 2019, 12:57

This is a pretty specific issue. It would really take some one with the exact set up you have to give you good information. I hope that happens but it is probably unlikely. The good news is that it sounds like a 12mm spacer can fix the problem if there is one.
Bill Basore, Editor / Publisher
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Re: Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

#5

Post by Czechmate68 » 10 Dec 2019, 22:21

xr7g428 wrote:
10 Dec 2019, 12:57
This is a pretty specific issue. It would really take some one with the exact set up you have to give you good information. I hope that happens but it is probably unlikely. The good news is that it sounds like a 12mm spacer can fix the problem if there is one.
Thanks Bill for the reply. I just got the wheels delivered yesterday. Initial test for looks pretty good but till I get a tire on and and can see what my clearance looks like I'll have to wait and see.
It just seems like most are running 15" wheels so I didn't know if I overshot this as I just have no previous experience. If I am still drums all the way around does that make it any less likely for any problems relating to back spacing?I
I think a lot of people are also busy with the Holidays right now and maybe less on this great forum.

Much Thanks,
Brian

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Ride: 1968 XR7 302 2V - undergoing refresh

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Re: Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

#6

Post by BossElim69 » 11 Dec 2019, 05:58

Tire selection for 16" is still limited. 17" is more popular and puts the tire above the upper ball joint. 4.5 back spacing works with a 17" rim. I don't know about 16" and most likely will depend on how wide of a tire you're going to run.
Brian Carpenter, President CATS classic Cougar club
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Re: Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

#7

Post by Czechmate68 » 12 Dec 2019, 23:04

BossElim69 wrote:
11 Dec 2019, 05:58
Tire selection for 16" is still limited. 17" is more popular and puts the tire above the upper ball joint. 4.5 back spacing works with a 17" rim. I don't know about 16" and most likely will depend on how wide of a tire you're going to run.
So looks like you are definitely right on a 16" wheel not clearing the upper control arms. So if I drop down to the 15" inch up front will the 7" wheel width clear OK?
I had ordered a 225/50/16 so tire width would be 8.9" for the 225mm. Any insight on that too.
I'm hoping I can use the 16" wheels on the back and just get the 1 5" for the front.
The back spacing is still a question because these are 5.45" as noted above.
Are there options on changing the control arms to some that might work better?
Sorry for all the questions but this is a first for me.😬
Brian

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Ride: 1968 XR7 302 2V - undergoing refresh

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Re: Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

#8

Post by sfhess » Yesterday, 17:12

I have 16x7 Grand Marquis Sport wheels on my 69 XR 7. Not sure of the backspacing. They fit fine, clear everything.

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Re: Re: 68 Rusto-Cat-Restoration - New Wheels & Tires Questions??

#9

Post by Czechmate68 » Yesterday, 23:40

sfhess wrote:
Yesterday, 17:12
I have 16x7 Grand Marquis Sport wheels on my 69 XR 7. Not sure of the backspacing. They fit fine, clear everything.
Sfhess, thanks for the reply. I don't know if there are any differences between 68 - 69 but it is interesting to learn your 16x7's fit and mine clearly lands smack into my upper control arm. I'm wondering if might be how I have it resting on the back stands. Or mine have to much back spacing.
This is why I'm asking to learn this stuff.
Brian

CCOA# 10035
Ride: 1968 XR7 302 2V - undergoing refresh

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