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Dave Weaver
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« on: March 29, 2009, 05:19:34 PM » |
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I purchased my truck, a 2004 F-150 Heritage, in November, 2004. This truck came with 16" tires and wheels as standard equipment. I have seen trucks in this model, engine, and 4x4 rating with 17" tires, however. I acquired a new set of 17" tires today free. Will it hurt anything to mount these on my truck? I realize I will have to buy some wheels. I think it will affect my speedo and odometer, but will it harm engine, tranny, transfer case, or anything else? I just want to know before I sink any money into wheels. TIA, Dave  |
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bigvalkriefan
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Posts: 407
On the green monster
South Florida
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« Reply #1 on: March 29, 2009, 05:28:43 PM » |
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Dave, I'm no expert but I've owned a lot of trucks in my life. It will not hurt your truck at all. Just look at those trucks that put the big mud tires on. As you said it may affect your speedo and odometer but that will be determined more by the size tires you put on. Looking at the pic your truck would look beefier if you filled up the wheel well a little more. Just make sure they don't rub in front when you turn. Put them on and enjoy!  |
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.....say to those with fearful hearts, "Be strong, do not fear; your God will come, he will come with vengeance; with divine retribution he will come to save you."
Isaiah 35:4
I know who wins in the end.
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John U.
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« Reply #2 on: March 29, 2009, 06:13:48 PM » |
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Hey Dave,
Depending on the overall diameter of the mounted tire, you may affect gas mileage, a much larger tire will likely reduce around town mileage but increase it on long trips.
Unless you haul heavy loads it's not likely to affect your transmission.
If the tires are much wider you may have clearance issues and if the wheels don't have the same or similar offset you could put extra stress on the front bearings.
Some of the online tire dealers have diameter info.
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Tropic traveler
Member
Posts: 3117
Livin' the Valk, er, F6B life in Central Florida.
Silver Springs, Florida
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« Reply #3 on: March 29, 2009, 07:25:19 PM » |
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Diameter or rollout measurement is the biggest thing you need to check. If the two sizes are very close don't sweat it. If there is a big difference, that can be compensated for by a reprogramming of the processor. Most any Ford or L-M dealer shop can do that for you. The reprogramming will correct speedo & shift points.
Smaller diameter=more low end grunt with increase in highway RPM.
Larger diameter=less low end grunt with decrease in highway RPM.
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Big Rig
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« Reply #4 on: March 29, 2009, 07:59:17 PM » |
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Dave,
BTDT...07 f150. As long as you keep all 4 wheels the same Dia you will be fine...just remember to increase the spare...if you have dif dia and use 4x4 you will tear up the transfer and tranny for sure...Nice looking truck...wish I kept my 97...
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MP
Member
Posts: 5532
1997 Std Valkyrie and 2001 red/blk I/S w/sidecar
North Dakota
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« Reply #5 on: March 30, 2009, 05:04:31 AM » |
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One option to consider is to go to a larger 16" tire. I went to a 80 series, it is quite a bit taller. Fills the wheel wells out much better. You get about the same effect as 17", but do not need to buy 5 wheels.
Go to a tire store that specializes in heavier pickup/van tires, and ask. I run cooper 80 series. Very good tires.
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 "Ridin' with Cycho" |
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Airetime
Member
Posts: 156
U Never See a Valk Parked @ a Psychiatrist Office
Anacortes, WA
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« Reply #6 on: March 30, 2009, 05:09:32 AM » |
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I purchased my truck, a 2004 F-150 Heritage, in November, 2004. This truck came with 16" tires and wheels as standard equipment. I have seen trucks in this model, engine, and 4x4 rating with 17" tires, however. I acquired a new set of 17" tires today free. Will it hurt anything to mount these on my truck? I realize I will have to buy some wheels. I think it will affect my speedo and odometer, but will it harm engine, tranny, transfer case, or anything else? I just want to know before I sink any money into wheels. TIA, Dave I found this tire calculator a few years ago and it is in Shop Talk now http://www.dakota-truck.net/TIRECALC/tirecalc.html Play with the original size against the new and you will see what effect they will have, taller, wider etc.  |
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Zorba
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« Reply #7 on: March 30, 2009, 09:56:27 AM » |
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Might effect your wallet if a cop pulls you over for speeding , you'll probably be going 7 to 9 MPH faster than your speedo says you are!  |
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ArmyValker
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« Reply #8 on: March 30, 2009, 06:58:10 PM » |
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Nothing to worry about. A 1" upsize rim isn't enough to make any difference. If you were talking about throwing 38" or something on it'd be a different story. You can get the dealer to reprogram your PCM for the new size wheels BTW.... will fix your speedo.
Also, your odometer will rack up the miles a bit quicker if you don't.
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