Mousefart
New Jersey
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Joined: 08/15/2004
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RRRKKK wrote:Brakes stop the truck, the total weight of the tires and wheel would add to the mass but I suspect the original brakes will be entirely sufficient.
My statement about brakes was not just me blathering out my behind. Aside from my own personal experience with my Ramcharger, PROFESSIONAL custom truck builders say the same thing.
It goes beyond just the weight of the truck. Larger diameter tires cause more "leverage" against the force of the brakes. The wheels actually turn slower for any given speed but by doing so require much greater pressure from the brake calipers to stop them. Stock calipers and disks are NOT up to the task. Larger diameter disks and heavier calipers are in order here.
This is all simple high school physics (levers and such). No big mystery here. A bigger wheel is harder to get going AND harder to stop, from both a weight AND leverage (ratio) standpoint.
Paul (Mouse)
2007 Flagstaff Shamrock 17 Hybrid (heavily modified for boondocking and winter camping).
2007 Dodge Dakota Quad Cab, 4.7L HO engine, Factory tow package, Equil-i-zer WD Hitch, Prodigy brake controller.
Yamaha EF2400 Generator.
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rmontez
Wisconsin
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Joined: 01/27/2008
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Thanks everyone, didn't mean to cause any issues. I do have a friend that runs them and I have riden and driven his truck several times. To me they do not affect the ride. As far as towing the only thing he tows is a four place jet ski trailer so we can get no experience from that. Dodge and Ford do not need a lift for the tires, GM trucks do need a lift or the tires rub. My thoughts on the truck bed height are thinking about how much my 5er already squats the truck with these rims and tires and the squating from the 5er should bring the truck bed back to the original height? That was just a thought. I was really hoping someone had tried these while towing a 5er. Thanks again, Rene
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wa8yxm
Wherever I happen to park
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Joined: 07/04/2006
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I will comment on height too.. Some states (Michigan is one) have rules, I won't even try to explain the rules, but it has to do with the height of the rails v/s the weight of the truck, You need to keep the rails close enough to the road (This law was enacted to keep those "monster" trucks where you need a step ladder to climb into the cab, off the road, works too) The formula is more complex than I care to post. michigan.gov web site will take you to it if you wish.
In addition you need to make sure you have the clearance in your wheel well or you have to jack it up even more, and if you do that I'll save you the trouble of visiting the state web site... Keep out of michigan.
Now: though it might improve MPG, it will also reduce your towing ratings and it will affect the speedometer calibration so you have to re-calibrate or risk tickets a plenty
But then.. If you want tickets a plenty, please come to michigan, we need the cash.
Nothin adds excitment like something that is none of your business
John is Near Kenwood TS-2000 housed in a 2005 Damon Intruder 377
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rmontez
Wisconsin
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You make Michigan sound like a great place not to visit!! lol.
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Fisherman
Angus, Ontario, Canada
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Joined: 09/28/2002
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As for the MPG's, there is a very small window to play with to get any increase in MPG when going with a larger diameter tire/wheel. After having read and toyed with the idea, I found that anything more than 1 to 2 tire sizes larger than stock and your MPG's will drop. Stick with what the mfgr's put on the truck and you'll be running the optimum.
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Deen
Vancouver, WA
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Joined: 12/07/2000
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I remember reading that some manufactures (Chrysler products) were voiding warranties if oversize after market wheels/tires are mounted. That could void your driveline warranty depending on what goes wrong. Better check on it and get it in writing to avoid problems.
Deen - Vancouver, WA
'02 Dutch Star 4090 (41+', triple slide)
435/1200 ISC Cummins/Banks PowerPak
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'05 Honda Odyssey/dolly
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wa8yxm
Wherever I happen to park
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rmontez wrote:You make Michigan sound like a great place not to visit!! lol.
Depends. If you are legal it is a great state to visit.
If you like feeding the bears... Well, It's still a great state to visit but if you like feeding the bears (As the CBers call getting traffic tickets) you are going to get them no matter where you drive so please, come here, we need the cash. And frankly there are other states where the bears take bigger bites out of your pocket
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Matthew_B
The boonies near Dallas, Oregon
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Joined: 08/18/2005
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You can meet part way and put on 19.5" tires. They are built the same as the big rig tires, just smaller and lighter.
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markowwes
Vegreville, Ab. Canada
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Joined: 02/28/2007
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Don't waist your money. Those large rims and tires are for hauling weight....way more weight than that truck can handle (we are talking thousands of lbs.), Try a set of Rickson 19.5 rims if you want to upgrade. They work great.
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jaminjer
Menifee, California
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Joined: 03/21/2007
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I do not personally have either size, but have read that the 19.5 was the way to go. http://www.ricksontruck.com/
99 Ford 7.3 SC SD with ATV rack on top
2003 Cougar 245EFS
mods-4 golf cart batteries, 1750 watt inverter with toggle switch installed for living room outlets
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