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SUVs Chevrolet Suburban & Tahoe 2007 and newer Chevrolet Tahoe and GMC Yukon
3125 messages, Last post on Nov 27, 2009 at 6:32 PM
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Replying to: awf_axis (May 16, 2006 9:15 am) If thats the case then now Im stuck wondering... What damage could running the smaller rim width on a 305/50/20 do? I am now considering going to a 22" rim to help fill out the 305s. What sizes of rim and tire would you suggest in my searches as an owner of a similar vehicle with 22s? Another issue is tires... I want some that are aggressive enough to do well in dirt and rain but still would like a smooth and quiet ride. Any recs for brand and size for either 20 or 22" rims? Again thanks in advance for all help.
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Replying to: cecook (May 16, 2006 12:06 pm) I would imagine that if you had a blowout, the tire manufacturer would not warrant such an application. The "filling out" of a 305 isn't remedied by a larger diameter. This measurement is the width. If you go 20" or 22", you still need a wider rim. The thing about going to a 22" rim is that you will need a lower profile tire, meaning 40 or 45 ratio. On the Escalade, they are running 285x45x22 on a 22x9 wheel. If you went to a 305x40x22 tire, then a 10" width is recommended. A 305x45x22 tire could get away with a 9.5" width. These "recommendations" come from an on-line tire vendor. You can also see the diameter differences that come about as well. http://www.1010tires.com/TireSizeCalculator.asp There are significant changes to diameter depending on the wheel combo you select. The difference in diameter in the 305x40x22 and 305x45x22 tires is over 1 inch. This changes the mileage attained and MPH readings as well. It's not simple to recalibrate the computer either. You have to buy an aftermarket programmer to do it, because the dealers typically won't do it. Long story. Finally, you have to consider the ride quality. The more sidewall a tire has, the smoother the ride. A 40 Series tire is firmer than a 50 series, and so on. The benefit is that the lower profile (40 series) will have LESS sidewall flex, and theoretically makes the handling more precise. The wider tires, 305 vs. a 275 or 285 has some disadvantage too. Because there is so much more width on the road, you "feel" more, and it also tends to "seek" grooves and ruts in the road. I put 305's on an '01 Denali, and was somewhat dissapointed in the steering because it would literally drive itself whenever there were imperfections in the road. I live in snow country, and tire chain usage creates ruts in the asphalt. The tire's edges would try to drive up the ruts, steering me left or right, which-ever had the higher edge. The Tahoe/Yukon/Escalade rack & pinion steering should reduce this affect, but I can't say for sure. I don't get this senstation with my current setup. On the '01 Denali, I ultimately went to a 275x55x20 with a 20x8.5" wheel, and even though it didn't look as cool, it drove much better. If I was in your shoes, I'd probably buy a 20x9.5 wheel, put on some Goodyear 305x50x20's, with a 25mm positive offset. The style would be one that had the lowest rim weight. A flashy wheel with lots of weight makes for poor handling. The best I've seen is a Weld Wheel EVO, which is a 1 pc, forged, chrome wheel, which is extremely lightweight, and several times stronger than most other wheels. Problem is, they are expensive, and hard to find. They have discontinued a few styles. You can scan through www.DiscountTireDirect.com for some wheel styles. Dave |
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Replying to: awf_axis (May 16, 2006 1:05 pm) link title |
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Replying to: dieselone (May 15, 2006 1:03 pm)
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Replying to: sj110 (May 16, 2006 1:25 pm) The fact that the 6spd has a lower 1st gear, and tighter shift ratios means they could get away with a lower final gear. This is what helps with the overal highway fuel economy. Based on 8 yrs of towing my boat over the Sierra Nevada mountains, I would never consider a 4 spd again. If I was looking for the ultimate tow and GVWR rated vehicle, it would have been a diesel pick-em-up truck. However, I don't like diesel, and have two daughters and and 2 grand-kids. The SUV is a must. Dave
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Replying to: awf_axis (May 16, 2006 1:05 pm) I think I am one the right page and have found a good combo. What do you think about some 22x9.5 Helo Skids or Helo Kick with 20 offset paired with some 285/45/22 Bridgestone Dueler H/L Alenzas? This way I get a nice looking wheel, the rim fits the tire better, there is a good tread pattern on the tire, and hopefully it won't stick out of the fender well. Any comments? Thanks again for your help/time!
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Replying to: awf_axis (May 15, 2006 10:22 am) |
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A reporter is interested in talking with consumers who have purchased All-Wheel-Drive vehicles, or would consider doing so next time they are in the market. Please respond to jfallon edmunds.com with your daytime contact information and a few words about your level of interest in AWD.
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Replying to: cecook (May 16, 2006 3:41 pm) The 20mm offset will push the entire wheel out just a tad, but nothing brutal. The factory 22x9 is 31mm, which is 11mm more tucked, and with your 1/2" wider wheel, will put a total of 26mm further out. Certainly not life or death, but again consider the wheel width. You might play with doing a 305x40x22 tire, which might be less expensive, but will look more agressive. The only drawback is that the tire is about 4/10ths of an inch smaller in diameter. Your tire person may help you out here with this by letting you try it on for looks. And yes, you'll have a "firmer" ride with the 40's. Dave
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Replying to: junglegeorge (May 16, 2006 3:44 pm) As for the mileage, I'm not so sure that the real-world plays out like the EPA numbers say. I can get 21 mpg on flat road, doing 55 mph. At 65, it becomes 18.5. The DOD engine certainly sounds like it ought to squeak some mileage, but I've seen and heard numerous comments on the DOD kicking in/out, the harmonics being annoying, and many wishing they could disable it. The differences would seem minor over the long haul, and I hate the feeling that I could have gotten something a little nicer. The resale is better on the higher end SUV's as well. Dave
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