The Effects of Going With Oversized Tires ??? - Ford Truck Enthusiasts Forums

Go Back  Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 2004 - 2008 F150
Reload this Page >

The Effects of Going With Oversized Tires ???

Notices
2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 engine

The Effects of Going With Oversized Tires ???

 
  #1  
Old 04-14-2009, 09:37 PM
spatts
spatts is offline
Senior User
Thread Starter
Join Date: Jan 2008
Posts: 135
spatts is starting off with a positive reputation.
The Effects of Going With Oversized Tires ???

I recently changed my 2005 F-150's Tires to Geolander A/t's 315 /70/17 or 35x12.5x17 on stock rims. I have seen alot of threads here on possible gear changes ,is this really needed ? I have noticed some slight changes such as a more sluggish acceleration from a stop or a little bit more stopping distance . I also can confirm that at 60 mph my truck is actually going around 67 mph . I can live with these minnor changes but was wondering if I could be doing any possible damage to the Truck at all ? I really like the way these tires perform overall and they look great , but cant see going for anymore $$$$$ if not really needed

 
  #2  
Old 04-14-2009, 09:40 PM
jstnromero's Avatar
jstnromero
jstnromero is online now
Postmaster
Join Date: Nov 2006
Location: The Woodlands, TX
Posts: 2,801
jstnromero is a splendid one to beholdjstnromero is a splendid one to beholdjstnromero is a splendid one to beholdjstnromero is a splendid one to beholdjstnromero is a splendid one to beholdjstnromero is a splendid one to behold
the gear change will help with the sluggish starts. As for the speedo, a programmer can calibrate the speedo for the changed tire size. I don't think that running oversize tires will hurt your vehicle. I do It and have had zero issues. (Did it the first week after getting the leveling kit and have been running for 4 years now.)
 
  #3  
Old 04-14-2009, 10:58 PM
Tylus's Avatar
Tylus
Tylus is offline
MMNC (SS)
Join Date: Mar 2004
Location: Groton
Posts: 11,254
Tylus has a superb reputationTylus has a superb reputationTylus has a superb reputationTylus has a superb reputationTylus has a superb reputationTylus has a superb reputationTylus has a superb reputationTylus has a superb reputationTylus has a superb reputationTylus has a superb reputationTylus has a superb reputation
you only need gears if you think you need them


same with the speedo. as long as you are aware of the offset, it's cool


It drives me batty, so I would have to get the re-program done. Both of my cars are about 1 mph off on the slow side right now, and it annoys the **** out of me. But I an't forking $300+ for each vehicle to get a programmer. Eventually the truck will get one, but I got other stuff in mind first



something else to consider is brake pads...when they're due, I highly suggest you upgrade to a better stopping pad. you can't ever have enough stop IMO
 
  #4  
Old 04-15-2009, 12:37 AM
Flying_Dutchman's Avatar
Flying_Dutchman
Flying_Dutchman is offline
Posting Guru
Join Date: Dec 2008
Location: Langley BC
Posts: 1,756
Flying_Dutchman has a good reputation on FTE.Flying_Dutchman has a good reputation on FTE.
A programmer would remedy your speedo issues as well as the slow acceleration issues.
 
  #5  
Old 04-15-2009, 06:08 AM
dixiemudder04's Avatar
dixiemudder04
dixiemudder04 is offline
Elder User
Join Date: May 2004
Location: nc
Posts: 653
dixiemudder04 is starting off with a positive reputation.
Would a regular programmer (like a cheap one off ebay) fix the speedo? My is off 5 mph. The ford place said they dont reprogram the speedo, Told me to call another place which btw wont do it either. Which prgrammers have a setting for gear/tire ratio for better mpgs?
 
  #6  
Old 04-15-2009, 10:20 AM
BatteriesNotINCL's Avatar
BatteriesNotINCL
BatteriesNotINCL is offline
Senior User
Join Date: Nov 2004
Location: Travis Air Force Base, CA
Posts: 376
BatteriesNotINCL is starting off with a positive reputation.
I custom tuned my EVO for specific tire size and gear ratio....I believe the Gryphon does it was well....
 
  #7  
Old 04-15-2009, 04:49 PM
silver05fx4
silver05fx4 is offline
Posting Guru
Join Date: Jan 2008
Location: altoona
Posts: 1,048
silver05fx4 is starting off with a positive reputation.
just get a programmer and it will be like you never put them tires on and fix the speedo..but like sad get better brake pads and rotors makes a world of differents
 
  #8  
Old 04-15-2009, 06:43 PM
James_24_85's Avatar
James_24_85
James_24_85 is offline
Senior User
Join Date: Mar 2009
Location: Culleoka TN
Posts: 215
James_24_85 is starting off with a positive reputation.
With my super chips I can adjust for my tire size or a gear change in about 5 minutes. It's so easy.
 
  #9  
Old 04-17-2009, 12:09 PM
sdough
sdough is offline
New User
Join Date: Sep 2007
Location: PRESCOTT VALLEY
Posts: 11
sdough is starting off with a positive reputation.
By not changing gears or getting a programmer it will affect the shift pattern of the trans, and brings down your fuel milage with the sluggish starts.
 
  #10  
Old 04-17-2009, 12:26 PM
06F150STX's Avatar
06F150STX
06F150STX is offline
Elder User
Join Date: Apr 2009
Location: Quitman, LA
Posts: 568
06F150STX is gaining momentum as a positive member of FTE.06F150STX is gaining momentum as a positive member of FTE.
Originally Posted by sdough View Post
By not changing gears or getting a programmer it will affect the shift pattern of the trans, and brings down your fuel milage with the sluggish starts.
with my Edge Evo, i can change how i want my truck to shift, at what rpm to shift at, and how firm i want it to shift. trust me, just get a programer and you can change alot with one. you can advance or retard your timing. adjust your fuel rail pressure. adjust your rev limit. should i go on?
 
  #11  
Old 04-17-2009, 12:29 PM
06F150STX's Avatar
06F150STX
06F150STX is offline
Elder User
Join Date: Apr 2009
Location: Quitman, LA
Posts: 568
06F150STX is gaining momentum as a positive member of FTE.06F150STX is gaining momentum as a positive member of FTE.
Originally Posted by sdough View Post
By not changing gears or getting a programmer it will affect the shift pattern of the trans, and brings down your fuel milage with the sluggish starts.
sorry. double post
 
  #12  
Old 11-22-2012, 06:11 PM
CombatMatt12B
CombatMatt12B is offline
New User
Join Date: Nov 2012
Posts: 1
CombatMatt12B is starting off with a positive reputation.
Big tires/wheels on stock Truck.

I have a 2004 XLT 4.6 V8 Triton
Club Cab. I bought the truck used from a deailer in 2006 with 64,000 miles. It now has 118,??? Miles. In 2008,
I got a 3" level kit put on in the front along with 20" wheels and 35" tires... the wheels and tires were not a good idea. Big loss in power, braking/stopping, and roter worp! I put my stock wheels back on and the tires are 255/70/17. Im in the process of getting new tires, 265/70/17 on stock wheels. What im saying from experience is that big heavy wheels and tires are NOT good for your brakes and rear diff... i would change them down to no bigger than 32". And now im looking forward to spending. The $$$$$$$ on new brake rotters and pads..
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Steve
Slide-in / Truck Campers
4
03-03-2017 02:39 PM
mike1202002
All Other Items for Sale
1
05-25-2016 07:29 AM
x2of3x
2004 - 2008 F150
13
03-25-2012 03:26 PM
ErricZ
1999 to 2016 Super Duty
8
03-17-2012 08:30 AM
spatts
2004 - 2008 F150
5
12-01-2008 08:19 AM


Thread Tools
Search this Thread
Quick Reply: The Effects of Going With Oversized Tires ???


Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.