smaller tires - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 07-10-2008, 07:55 PM Thread Starter
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smaller tires

i currentley have 35in bfg mudterrains on my truck and was wondering if drop down to a 33in. tire would gain me any performane my truck still has the stock 3.73 gears and stock tranny and my speedo was never recalibrated i pull a 32 ft. long goose about every other weekend would there be a noticable difference or no im do for new tires so thats why im asking now

99.5 F-250 4X4 LARIAT
35IN. BFG KM2s
2.5 IN. LEVELING KIT
AEM AIR INTAKE
TS CHIP (TUNED BY MATT @ GEARHEAD)
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GARRETT 38R TURBO
6.0 INTERCOOLER
4IN. TURBO BACK EXHAUST
CSE FAB SINGLE BLACK 8IN. SLASH CUT STACK
CCV MOD
CSE PRE PUMP KIT
TRANNY COOLER WITH FAN
CSE FAB PORTED EXHAUST FLANGE
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post #2 of 7 Old 07-10-2008, 07:57 PM
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You would see better mileage and most likely a little more pep. I run a 285x75R16 which is close to a 33. It is like a 32.5, I get good mileage. The other option would be to regear the truck. Which would cost more then new tires.


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post #3 of 7 Old 07-10-2008, 08:03 PM Thread Starter
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the only reason i have 35s on it is because thats what came on the truck when i got it im not a big fan of huge tires and lift kits on the street i want to be able to use my truck to its fulest pontential i have a leveling kit and the 35s are mounted on 16x10 eagle alloys the dont rub or anything just tyring to get opinions on this matter the smaller tires are a little cheaper

99.5 F-250 4X4 LARIAT
35IN. BFG KM2s
2.5 IN. LEVELING KIT
AEM AIR INTAKE
TS CHIP (TUNED BY MATT @ GEARHEAD)
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GARRETT 38R TURBO
6.0 INTERCOOLER
4IN. TURBO BACK EXHAUST
CSE FAB SINGLE BLACK 8IN. SLASH CUT STACK
CCV MOD
CSE PRE PUMP KIT
TRANNY COOLER WITH FAN
CSE FAB PORTED EXHAUST FLANGE
TIM MOYE TRANSMISSION
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post #4 of 7 Old 07-10-2008, 08:20 PM
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The smaller tires are cheaper, will give you better fuel mileage, bring your speedo closer to where it should be.

If your wanting to bring it back down close to stock. I would go with a 33x12.50R16 or a 305x75R16. Still would look good and give you a little more pep from your truck.


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2005 6.0 Crew Cab Long Box Lariat, current truck

2004 6.0 destroyed by contaminated fuel

2002 7.3L burnt
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post #5 of 7 Old 07-10-2008, 08:24 PM
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Yes, you'll for sure feel more power and and get better mileage!

Jason
2006 F250 2wd 6.0 psd, 8.96 1/8th mile with canned SCT tunes, now running Spartan Hybrid Race tune! AFE Stage 2 PRO DRY S, 4" turbo back str8 pipe in front of rear tire, auto, crew cab short bed, ZOO DAD mod, 5% tint over the factory tint.
Track Times!
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Reaction---.674
60 ft-------1.892
594 ft------8.370
1/8th ET---8.965
1/8th MPH--75.63

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post #6 of 7 Old 07-11-2008, 01:09 PM Thread Starter
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yeah thats what im thinking

99.5 F-250 4X4 LARIAT
35IN. BFG KM2s
2.5 IN. LEVELING KIT
AEM AIR INTAKE
TS CHIP (TUNED BY MATT @ GEARHEAD)
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GARRETT 38R TURBO
6.0 INTERCOOLER
4IN. TURBO BACK EXHAUST
CSE FAB SINGLE BLACK 8IN. SLASH CUT STACK
CCV MOD
CSE PRE PUMP KIT
TRANNY COOLER WITH FAN
CSE FAB PORTED EXHAUST FLANGE
TIM MOYE TRANSMISSION
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post #7 of 7 Old 07-11-2008, 01:52 PM
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if you run high speed freeway smaller tires may hurt your millage, spinning more rpm, but around town smaller tires will help.

early 99 f-350 7.3 6speed crew cab
banks exhaust, chip, big head, exhaust houseing
and wheel
Ford AIS intake
5.5" fabtech lift w/ 35x12.50/18's
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