315/75r16 tires - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 08-18-2013, 07:27 AM Thread Starter
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315/75r16 tires

Hey guys currently run these tires now in a good year duratrac. I think I want to go to a 33 inch tire. ( better fuel mileage)What is the quietest, longest lasting tire?
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post #2 of 17 Old 08-18-2013, 10:10 AM
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i have 285/75/16;s which are a 33.
i like my duratracs. been on for 10k miles and still look new.

they do awesome in the snow and mud.
315 are more of a 35 inch tire.

99.5 f250 7.3 4x4 255k
PHP Phoenix, S&B, 4" Diamond Eye, Hpx, Stancor, RR Billet Wheel, RR AIH Delete, Autometer Gauges, Pro Comp leveled, Transgo Tugger, Billet TQ Converter, Warn Hubs, Int'l Up-Pipes, RR IC-Boots, Non-Ebpv Pedestal, High Flow Outlet, Hucorey's HPOP Lines, RR High Flow Fuel Fittings, RR OCR, Barder 360 Thrust Kit, 08 Tow Mirrors.

Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, RR AIH Delete, 6637, 4" Diamond Eye, BD Billet Wheel, TruCool Max
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post #3 of 17 Old 08-18-2013, 11:20 AM Thread Starter
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I wonder if a 33 inch tire will get my speedometer to read correctly? Right now it is about 5 miles an hour slow
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post #4 of 17 Old 08-18-2013, 02:31 PM
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It Will Be Closer. Mine Is 1-2 Mph Off With 285/75/16

[/SIGPIC]2001 F-250 ecsb 4wd auto 150,xxx miles. 6637 factory straight pipe. Amsoil bypass system. Triple Gauge Pod.
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post #5 of 17 Old 08-18-2013, 02:54 PM
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ya my 285's make mine off by about 2mph.

99.5 f250 7.3 4x4 255k
PHP Phoenix, S&B, 4" Diamond Eye, Hpx, Stancor, RR Billet Wheel, RR AIH Delete, Autometer Gauges, Pro Comp leveled, Transgo Tugger, Billet TQ Converter, Warn Hubs, Int'l Up-Pipes, RR IC-Boots, Non-Ebpv Pedestal, High Flow Outlet, Hucorey's HPOP Lines, RR High Flow Fuel Fittings, RR OCR, Barder 360 Thrust Kit, 08 Tow Mirrors.

Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, RR AIH Delete, 6637, 4" Diamond Eye, BD Billet Wheel, TruCool Max
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post #6 of 17 Old 08-18-2013, 03:13 PM
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mine dead on with 285s ha-ha, gps and speed sign verified lol

i would honestly keep the 315s, there not much difference in size,

the 315/75/r16 true size is 34.6 inches tall by 12.4" wide
the 285/75/r16 true size is 32.8 inches tall by 11.2" wide


the 285 tires are only 1" all the way around smaller and .5" in width smaller,



this is the size comparison from stock 265 to 315s (old 99 f150)

a 285 is in between that

as for longest lasting and quietest tires
i have had good luck with my handkook atms(315 on my old f150 and 285 on superduty)
and my Goodyear mt/r have the be the quietest tire ive had for a mt/r but can't tell you much for wear as its on my offroader

2002 F250 7.3/JW Tow master 4r100 190k miles
Mods:explorer heater valve, WR GP relay, RiffRAff boots, lariat overhead console, Hydra chip, 6637 mod, 6.0 cooler, AIH delete and isspro2 trans, egt, and boost gauges. 92 gallon aux tank with a total capacity of 130gallons, 1800 mile range , 4" MBRP straight Piped. 2" Warrior shackles
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post #7 of 17 Old 08-19-2013, 02:36 PM
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I'm running a 305/70/16 bf Goodrich all terrain, speedo off about 3-4 mph.
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post #8 of 17 Old 08-19-2013, 03:32 PM Thread Starter
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What would I go with if I wanted a skinner tire but same height or 33 inch
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post #9 of 17 Old 08-19-2013, 03:57 PM
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Quote:
Originally Posted by jvanwalsen View Post
What would I go with if I wanted a skinner tire but same height or 33 inch
I hate metric, tell them you want a 33x10.5x16. Let them do the math!!!!!

You will get better mileage out of a skinnier tire. The wider the tire the more rubber on the ground creating friction/traction however you wanna look at it.

Taller tire with these rigs wont make a huge difference on mileage due to the amount of torque we have, motor already pushing 8K plus, 1" or 2" taller tire wont make a huge difference, might actually improve your highway MPG, taller tire = less RPM's to achieve a certain speed. But if you tow a lot the motor needs to work a bit harder if you go with a bigger tire, your final drive ratio is affected with tire height.

That being said i run a 35x12.5x18 with 3.73 gears. 2K RPM's im at 70 MPH getting about 18.5 MPG (i have a heavy foot) Towing my trailer (roughtly 7K lbs) i drop to roughly 14 mpg, but i also keep doin 70 when possible.

2000 F-250 XCLB 4x4 6 Speed, PIS 175/80's, ARP's, 910's, CNC Fuel Lines, 6637 Intake, GTP38R WW2, 4" turbo back, Hydra with Powerstruck and PHP tunes. International Up-pipes, ISSPRO Boost, EGT, HPOP and Fuel Pressure gauges. SB Clutch. MB Diesel HPOP.

Future Parts: Trac bars
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post #10 of 17 Old 08-19-2013, 05:41 PM
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285 is gonna be the skinniest 33 inch tire.
its only 11 inches wide, 32.8 inches tall

99.5 f250 7.3 4x4 255k
PHP Phoenix, S&B, 4" Diamond Eye, Hpx, Stancor, RR Billet Wheel, RR AIH Delete, Autometer Gauges, Pro Comp leveled, Transgo Tugger, Billet TQ Converter, Warn Hubs, Int'l Up-Pipes, RR IC-Boots, Non-Ebpv Pedestal, High Flow Outlet, Hucorey's HPOP Lines, RR High Flow Fuel Fittings, RR OCR, Barder 360 Thrust Kit, 08 Tow Mirrors.

Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, RR AIH Delete, 6637, 4" Diamond Eye, BD Billet Wheel, TruCool Max
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