Last post on Feb 22, 2012 at 6:26 AM
You are in the Chevrolet Silverado & GMC Sierra
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Chevrolet Silverado 2500HD, Truck
#68 of 82 Thinking of increasing tire & wheel size?
Oct 26, 2009 (8:31 pm)
I have a 2005 Silverado 1500 extended cab 2wd. It has the 5.3 engine with a 3.73 rear end. It came stock with 245/70/17 tires. An optional tire was 265/70/17. I am thinking about getting a set of tires and wheels from a friend who replaced theirs with some fancier wheels. The size is 265/65/18. They are from a late model Chevy Tahoe. They bolt on fine and do not scrub (have not driven with them). The old tires had maybe 1" of clearance from the torsion bar when you crank the wheel all the way to the side. With the new 18" wheels and tires, the clearance is down to about 3/8".
When you compare the two sizes, the 265/65/18's are only .79" wider and 1.06" taller than the 245/70/17's. When you compare the 18" to the optional 265/70/17, there is very little difference in size.
What problems might I run into by running the 18" wheels and tires?
I believe it will effectively lower my rear end gear down slightly to around 3.6. I don't know that that little difference will be noticeable as far as power or gas mileage?? Any problems with the transmission?
Any thoughts would be appreciated.
#69 of 82 Rating High Mileage tires
Nov 11, 2009 (12:41 am)
When I bought my 2001 Duramax 2500, the tires were old but I still drove another 23,000 miles on them. When I replaced them with E rated Goodyear Trackers, I got just 16,000 miles. The back wore out the center quickly, I understand this has to do with the torque, but the old tires still held up a lot longer. I need something more like that. I've noticed people have posted in other forums that "The tracker has to be the worst tire ever." Won't argue with that.
On an LT tire, how do I check the mileage rating? I haven't found the LT's to have the same ratings on them as the P tires do. I'd like to avoid P's on a 2500.
Oh, and the 2500 is one tough truck. The eucalyptus tree in my yard fell on it, and it took hours with a chaninsaw to cut it out. Drove fine afterward, not even much body damage.
#70 of 82 will these rims fit my truck
Dec 28, 2009 (5:32 pm)
#71 of 82 will these rims fit my truck
Dec 28, 2009 (5:32 pm)
will rims off of a 2003 suburban 2wd fit my 2007 new body style sierra they are boss 301 20" by 8.5 plus 14 offset 6 lug 5.5 back space 5.45
#72 of 82 Spare Tire Size Variances
Jan 02, 2010 (3:35 pm)
Given that the dealer option lists provide the opportunity to select a different size spare tire, how much difference will not lead to damage?
The build list of my truck indicates that the original tires were 265/75R17 and the spare was 265/75R16.
This is an inch difference in diameter.
Is this a problem for the 4x4 system and what is the distance you can expect to go before damage is caused?
Over the weekend, a tire was terminally damaged by road debris about 250 miles from home. Was this too far to run the miss-matched tires? I replaced the tire at a higher cost than I could have at home as I was looking at “changeable weather over summit” that might have invited the activation of four-wheel-drive, which is another consideration.
So, the REAL question here is, how close is close enough?
#73 of 82 Spare Tire Size Variances Part 2
Jan 02, 2010 (3:54 pm)
The question posted above only addresses the mechanical issues.
I know from experience years ago driving my BMW 2002 in a very “spirited” manner with a non-matching tread pattern on one tire, that it can seriously elevate the pucker factor.
So to answer the question as to information left out of that previous post; the tires on the truck when I bought it used are Nitto Terra Grappler LT285/65R18 on Diamo rims that do look good. They are the same tire diameter as the build list tires. They were also LTs, by the way.
And yes, I would expect the tread width to add significantly to the pucker factor caused by the tread pattern. These would not be mechanical issues unless I hit something because of it…
How close is close enough in the diameter issue is still the question I am interested in.
#74 of 82 Spare Tire Size
Jan 07, 2010 (8:25 pm)
Anyone know if a 32.5 inch diameter tire will fit in the spare tire hiding place under the bed of a 2007 2500HD NewBodyStyle short bed? Hoping I don't have to mount a tire on a rim to see if it fits.
#75 of 82 loose wheels GMC Sierra
Jan 13, 2010 (3:02 am)
#76 of 82 loose wheels GMC Sierra
Jan 13, 2010 (3:02 am)
I have a 1994 GMC Sierra, have had it for 7 years with no problems with the wheels coming off. Yesterday, driving at about 50 mph the driver's side rear wheel came off. No one was injured luckily. I had a flat tire on that side a while ago and the spare was on while the tire was repaired and then the wheel was replaced. I had the truck towed to the mechanic who repaired and replaced the wheel His comment was that this particular model did that frequently. I have not found that to be the case. The holes in the rim were all chewed up from being driven when loose. Has anyone else had this problem with a Sierra or is this person just trying to get out of paying to replace what needs to be replaced? My gut feeling is that he is trying to avoid his responsibility.
#77 of 82 Re: Spare Tire Size [akjbmw]
Jan 30, 2010 (11:36 am)
Since there were no responses to my previous questions, I am guessing no one has checked the thread who knows or is willing to venture opinions.
So, for whomever is looking for what others have done...
A year ago I bought a used 2007 2500HD NBS Crewcab shortbed Duramax with about 3 inch lift and Nitto Terragrappler 285/65R18 tires on Diamo rims.
I have had the rear of the front wheel wells tweaked to stop the rubbing on hard turns and changed the spare to a used 285/75R16 (it does fit up underneath the bed) so all tires are now pretty close to the same approximate 32.6 inch diameter, less wear.
The lug nuts are supposed to be compatible with the stock spare rim so when I am pulling my trailer (portable motel room) across the middle of the great open West with another tire problem (New Years Eve day something on the road cut through steel belts in center of a tire - not a fun thing), I can use the spare to get to the next berg large enough to find another Nitto tire.