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Old 06-07-2008, 12:36 PM   #1
 
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using low profile tires to reduce effective gearing

Hi..thinking of using 265/50 20 on front and 295/45 20 on my 2006 4 x 4. QC

The rolling turns are 663/ 662 respectivly.

The difference in effective gearing is about 6% so that should give me 4.10 as opposed to 3.92.

The differential in size should give share steering as the front tire sidewall are better supported on the rims....the rear that are pushing rim width should give addition traction...

SO..........please rip my thought to pieces...G

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Old 06-07-2008, 02:04 PM   #2
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using low profile tires to reduce effective gearing

According to the tire size calculator I used the 295/45 20 has about 1.2 inches wider tread than the 265/50 20. More rubber on the pavement should mean better traction. The sidewalls are the same height. I'm not sure I would want to use different size tires front to rear on a 4x4.
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Old 06-07-2008, 05:04 PM   #3
 
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using low profile tires to reduce effective gearing

If the revolutions per mile are the same i do no think there should be an issue ..I used to have Porsche 911 4 x 4 and the fronts and rears were different sizes.
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Old 06-07-2008, 06:48 PM   #4
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using low profile tires to reduce effective gearing

Yes but the actually powertrain gearing on that porsche was most likely different to make up for the different tire height.
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Old 06-07-2008, 09:28 PM   #5
 
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using low profile tires to reduce effective gearing

So...if the wheel turn per mile are the same front and rear as the tire have the same rolling radius the fronts being 50 profile and the rear 45 it will be the same sa std ...just more turns per mile.
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Old 06-07-2008, 11:46 PM   #6
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using low profile tires to reduce effective gearing

By the time you account for the added weight on the front of the truck making the tires "squat" it'd probaly even out. With them that close I don't think you'll run into any problems at all. Just think, if you did a decent size burnout in 2wd, and then put it in 4wd it would still driv fine, even though the rear tires are now slightly smaller than the fronts. This message has been edited. Last edited by: proudhemi, document.write(''+ myTimeZone('Sun, 08 Jun 2008 07:02:16 GMT-0700', '08 June 2008 10:02 AM')+''); 08 June 2008 10:02 AM
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Old 06-08-2008, 01:00 AM   #7
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using low profile tires to reduce effective gearing

that is probably closer than say running the SAME size tire but different brands on the front verses the rear. Because ever manufacture's roll out size is slightly different. Sounds like you did your homework on this one, mechanically, GO FOR IT!
Only thing i would be looking at is if this would be the "look" i was going for. are you going to be lowering the truck more? a 30.5" tall tire is relatively short, especially on a 4X
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Old 06-08-2008, 09:56 AM   #8
 
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using low profile tires to reduce effective gearing

Truck is already leveled and when shorter springs and shock as available for 2006 4 x 4 I will lover a bit more.

I will stick to one brand the latest issue I have found is that the General Tire UHP Grabbers are a bit on the heavy side.
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