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20x9" Xd Monsters - Need Tire Size Help

DrLev99

By DrLev99
in Tires, Wheels & TPMS

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DrLev99 Enthusiast

DrLev99

Posted
Posted

Hello,

 

I am a newer member and have a 2011 Silverado CrewCab 4x4, Z71. After doing much research on here re: rims, offsets, etc. I have decided to go with 20" X 9" black XD Monsters with +18 offset, however I have the stock suspension and do not wish to level it at this time.

 

Now that I have the rims figured out, I want to know what is the widest tire size and sidewall height I can go with without having rubbing issues. The "stock OEM" size would be 275/55/20's, but I know a 9" rim go can as high as 305's. Based on the basic stock height of my suspension, what width/tire wall combo sizes would work best....if I went with a 285, etc...??? I am pretty sure a 305 would not work without a lift from what I've read. If I went with a 285, would I have to drop to a 50 ratio side wall, or would a 55 still work/fit (speedometer issues aside)? I don't suspect there are too many tire options with 285/55/20 tires...from what I've seen, so it may have to be 285/50/20's, if they'll fit...? Whatever sizes anyone can recommend for that perfect look and fit would be appreciated.

 

I am not looking for off-road. M/T type tires. I am looking to run these mainly for highway, local daily driving. I apologize if this question has been asked 1000 times.

 

Thanks!! :)

summerfieldmd Enthusiast

summerfieldmd

Posted
Posted

Usually if you get your rims offline they can answer that question for you, but stock rim is like a 7.5 or 8 inch wide wheel and with the offset at +18 I would think any size may rub when you turn sharp. But I am no expert at this at all just letting you know what I think. I would hate for you to get the wrong size and need to buy other ones :jester:

DrLev99 Enthusiast

DrLev99

Posted
  • Author
Posted

I actually consider myself somewhat of an offset expert. I am a veteran member of another Car forum and am usually the one helping other people figure out the rims sizes, offsets, etc. I have done the research on the wheels, and I know ET18 will work with the Monsters (they are the most recommended offset)....just wondering if anyone has experience with 285/50/20's vs. 275/55/20's. Obviously the Monsters are wider than the 18" OEM rims I have now, so I am guessing 285's would be perfect.

 

As for the speedo, I would be keeping the rolling diameter the same with 285/50/20 vs the stock tires/rims, so that won't be an issue.

DrLev99 Enthusiast

DrLev99

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Posted
just get some 305/55/20 and call it day

I am guessing those would easily rub without any lift or level. Am I wrong?

blackout07 Senior Enthusiast

blackout07

Posted
Posted
just get some 305/55/20 and call it day

I am guessing those would easily rub without any lift or level. Am I wrong?

 

 

 

Those would rub badly with a leveling kit. To try without a leveling kit would be silly. I hope he was kidding.

Big Whiskey Senior Enthusiast

Big Whiskey

Posted
Posted

I really think you will be stuck with running the stock size (275/55/20) with those wheels, if you're not willing to put a leveling kit on your truck. The fender openings on these trucks suck big time.

DrLev99 Enthusiast

DrLev99

Posted
  • Author
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I really think you will be stuck with running the stock size (275/55/20) with those wheels, if you're not willing to put a leveling kit on your truck. The fender openings on these trucks suck big time.

You don't think 285/50/20 would work, considering the rolling diameter would be the same as the stock size above? I know they'd be a bit wider, but I'm not sure that would cause the rubbing...?

Big Whiskey Senior Enthusiast

Big Whiskey

Posted
Posted
I really think you will be stuck with running the stock size (275/55/20) with those wheels, if you're not willing to put a leveling kit on your truck. The fender openings on these trucks suck big time.

You don't think 285/50/20 would work, considering the rolling diameter would be the same as the stock size above? I know they'd be a bit wider, but I'm not sure that would cause the rubbing...?

 

 

Well, I think that size would probably work too, as long as you stay with the 50 series. Overally diameter is very close...and 10mm of extra width isn't much. I think you would be ok, that size just isn't near as common as the 275/55

DrLev99 Enthusiast

DrLev99

Posted
  • Author
Posted
I really think you will be stuck with running the stock size (275/55/20) with those wheels, if you're not willing to put a leveling kit on your truck. The fender openings on these trucks suck big time.

You don't think 285/50/20 would work, considering the rolling diameter would be the same as the stock size above? I know they'd be a bit wider, but I'm not sure that would cause the rubbing...?

 

 

Well, I think that size would probably work too, as long as you stay with the 50 series. Overally diameter is very close...and 10mm of extra width isn't much. I think you would be ok, that size just isn't near as common as the 275/55

 

I'd like to add some width if I can...so the 285's are probably the best compromise. Thanks for the comments.

Elboman Enthusiast

Elboman

Posted
Posted

I have a 2008 GMC Sierra C1500 extended cab. The original tires were 275/55/20's. I kept the stock rims and installed 305/50/20. Speedo still right on with my GPS so no issues there. The only place I have tire rubbing issues is full lock sometimes the sidewall rubs just a bit on the sway bar. No fender or inner fender rubbing at all. Tires look good to and give you that extra wider look you are looking for. I did notice a drop in fuel mileage from the OEM tires. Overall I love the new look, quieter ride, the ride is the same if not just a bit better, and traction is way better. No more easy burnouts.

Hope this helps.

 

http://www.tirerack.com/tires/tires.jsp?ti...=Extended%20Cab

FIII Enthusiast

FIII

Posted
Posted

I am running the exact setup your thinking about going to. I have Epic Rhine wheels 20x9 +18 offset with 285/50/20's. It just touches my mud flap in reverse (only on passenger side). I could trim it but it doesn't bother me at all. They do not rub anywhere on the body itself. DISCLAIMER: the tires do have 20,000 miles or so, so the tire size is a bit smaller than a new 285/50/20.

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