Max tire height on stock rally wheels and 4" front drop?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

UATahoe · 04-15-2015, 11:20 AM

Truck is an 87 at stock height currently but i am contemplating a 4/5 drop. I would like to run the stock rally wheels but currently have 30.5" tires. Pretty sure the 30.5" will still work in the back but was hoping i could get away with a 29" or possibly 29.5" tire in the front. I dont want to battle rubbing issues though. Any feedback would be great.

naphtali5725 · 04-15-2015, 11:27 AM

Quote:

Originally Posted by UATahoe

Truck is at stock height currently but i am contemplating a 4/5 drop. I would like to run the stock rally wheels but currently have 30.5" tires. Pretty sure the 30.5" will still work in the back but was hoping i could get away with a 29" or possibly 29.5" tire in the front. I dont want to battle rubbing issues though. Any feedback would be great.

not sure how to convert to tire size in inches, i have BFG Radial T/A's P245-60-R15's on 15x8" rally's with 4" backspace on the front, and 295-50-R15's with 15x10" rally's with a 4 1/2" backspace on the rear... and they fit just fine, but i only have mcgaughy's 2.5 inch front drop spindles, and flip kit in the rear...

UATahoe · 04-15-2015, 11:33 AM

That would be around 26.5" total height. I am almost certain my current 30.5" tires would be fine on a 2.5" front drop. But that extra 1.5" will be the sticking point. Pretty sure i will have to go with a 29".

For future reference, the first number (245) is the tire width in mm. the second is the sidewall ratio (60). Convert the width to inches (245/25.4), then multiply by the ratio (.60). That will give sidewall height. Double it and add the rim size.

naphtali5725 · 04-15-2015, 11:39 AM

Quote:

Originally Posted by UATahoe

That would be around 26.5" total height. I am almost certain my current 30.5" tires would be fine on a 2.5" front drop. But that extra 1.5" will be the sticking point. Pretty sure i will have to go with a 29".

For future reference, the first number (245) is the tire width in mm. the second is the sidewall ratio (60). Convert the width to inches (245/25.4), then multiply by the ratio (.60). That will give sidewall height. Double it and add the rim size.

thanks, good luck with it, let us know, so others have the info...

UATahoe · 04-15-2015, 11:45 AM

Definitely will do. Hopefully i can get a good idea so i dont have to do the whole trial and error route. LOL. Thats could get expensive.

naphtali5725 · 04-15-2015, 11:49 AM

Quote:

Originally Posted by UATahoe

Definitely will do. Hopefully i can get a good idea so i dont have to do the whole trial and error route. LOL. Thats could get expensive.

do you know of anyone else that has the same tires/rims, or something close that you could try one on yours to see how it fits?

Rich84 · 04-15-2015, 02:47 PM

I was running 30" tires with a 4.5" drop with no problems at all. Now I have 255 70 15's (29")and I have even more room.

**Willowrun** · 04-15-2015, 03:03 PM

29" tires w/ about 4.5" drop, 7" rims. No issues.

UATahoe · 04-15-2015, 03:09 PM

Awesome. Thanks for the feedback guys

bbbc10 · 04-16-2015, 05:33 AM

you can look threw my thread and see I had 5" drop with 255/60/15 an it rubbed but I think it would go good wth a 4" drop

04-15-2015, 11:20 AM	#1
UATahoe Registered User Join Date: Mar 2012 Location: Huntsville, AL Posts: 1,000	Max tire height on stock rally wheels and 4" front drop?? Truck is an 87 at stock height currently but i am contemplating a 4/5 drop. I would like to run the stock rally wheels but currently have 30.5" tires. Pretty sure the 30.5" will still work in the back but was hoping i could get away with a 29" or possibly 29.5" tire in the front. I dont want to battle rubbing issues though. Any feedback would be great. Last edited by UATahoe; 04-15-2015 at 11:27 AM.

04-15-2015, 11:33 AM	#3
UATahoe Registered User Join Date: Mar 2012 Location: Huntsville, AL Posts: 1,000	Re: Max tire height on stock rally wheels and 4" front drop?? That would be around 26.5" total height. I am almost certain my current 30.5" tires would be fine on a 2.5" front drop. But that extra 1.5" will be the sticking point. Pretty sure i will have to go with a 29". For future reference, the first number (245) is the tire width in mm. the second is the sidewall ratio (60). Convert the width to inches (245/25.4), then multiply by the ratio (.60). That will give sidewall height. Double it and add the rim size.

04-15-2015, 11:45 AM	#5
UATahoe Registered User Join Date: Mar 2012 Location: Huntsville, AL Posts: 1,000	Re: Max tire height on stock rally wheels and 4" front drop?? Definitely will do. Hopefully i can get a good idea so i dont have to do the whole trial and error route. LOL. Thats could get expensive.

04-15-2015, 02:47 PM	#7
Rich84 Registered User Join Date: Mar 2012 Location: Woodbury, Ct. Posts: 1,664	Re: Max tire height on stock rally wheels and 4" front drop?? I was running 30" tires with a 4.5" drop with no problems at all. Now I have 255 70 15's (29")and I have even more room.

04-15-2015, 03:03 PM	#8
Willowrun Senior Member Join Date: Mar 2013 Location: Ann Arbor, MI Posts: 1,022	Re: Max tire height on stock rally wheels and 4" front drop?? 29" tires w/ about 4.5" drop, 7" rims. No issues. Attached Images

04-15-2015, 03:09 PM	#9
UATahoe Registered User Join Date: Mar 2012 Location: Huntsville, AL Posts: 1,000	Re: Max tire height on stock rally wheels and 4" front drop?? Awesome. Thanks for the feedback guys

04-16-2015, 05:33 AM	#10
bbbc10 Diggin The SquareLife Join Date: Dec 2010 Location: garland,tx Posts: 1,933	Re: Max tire height on stock rally wheels and 4" front drop?? you can look threw my thread and see I had 5" drop with 255/60/15 an it rubbed but I think it would go good wth a 4" drop



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