f350 7.3 tire size
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f350 7.3 tire size - 11/6/2006 9:04:43 PM
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f350toy
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just bought a 99 7.3 f350 with LT305/70 tires, will changing tires back to orginal 265/75 improve milage??'m thinking michelin LTX M&S
thanks
JR
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RE: f350 7.3 tire size - 11/6/2006 10:07:38 PM
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Hayapower
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Might see a slight improvement especially in towing/trailering applications.. Not interested in 285's? They look a little nicer in stock applications.. Have you done any MPG calculations yet?
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05 F250 C/C FX4 6.0
1969 Firebird Trans Am
2003 Hayabusa GSXR1300
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RE: f350 7.3 tire size - 11/6/2006 11:04:05 PM
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f350toy
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Thanks your reply...hayabusa good one ...just bought a bmw k1200r love it...my buddy has a hayabusa...apparantly quite the ride...
I thought of going stock for the milage and the michelin LTX dosen't come in a 285...
jr
99 f350 7.3
98 volvo xc
85 landcruiser
99 grand caranvan 3.8 awd
86 taurus
05 bmw k1200r
98 suzuki 350 dxr
182u cessna
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RE: f350 7.3 tire size - 11/6/2006 11:32:17 PM
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Hayapower
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Ahhhh... But you said you were 'think'n' LTX...
I would think that the 265 would be better for low end power with a 4R.. Auto..correct?
_____________________________
05 F250 C/C FX4 6.0
1969 Firebird Trans Am
2003 Hayabusa GSXR1300
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RE: f350 7.3 tire size - 11/6/2006 11:51:53 PM
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f350toy
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yes it's an automatic...in my thinking large wheels would give u better milage...but i read that it's not the way it works??
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RE: f350 7.3 tire size - 11/7/2006 12:56:37 AM
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Hayapower
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I haven't had a lot of exposure running big tires on these S/D's.. Maybe someone else will chime in.. But, have had plenty of time under the hood, and behind the wheel.. The problem would be where the power/torque to gearing/speed would be, as well as load affects if any.. If you were to run at cruise speeds consistantly, no grades, unloaded, then larger tires 'may' yield a better mileage.. But, most times when I've pulled or driven, the 4R has what I call the 'dead zone' when speed is low (35-45) and the converter locks keeping RPM low, as well as turbo boost pressure/s, and power goes flat and suffers.. So,, the natural reaction is to shove your foot to the floor even harder to bring the power up, or kick down the shift unless OD cancel is selected.. more so with larger tires or load...and IMO would hurt mileage since most owners do a fair amount of city driving.. Plus,,these trucks are like pushing a 8K 'brick' through the air, and if peak power/torque at specific throttle angle/s isn't met more consistanly (think best torque is 1600-1900 RPM, and best peak HP is about 2600) than available power to load to falls off....
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05 F250 C/C FX4 6.0
1969 Firebird Trans Am
2003 Hayabusa GSXR1300
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RE: f350 7.3 tire size - 11/28/2007 4:38:05 PM
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mick
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I just bought a 1996 F-350. It had 265s on it when I got it, but when I went to Discount Tire, the only thing they would put on it was 235/85-16, because apparently, there is a law about putting only 8 or 10 ply tires on a 1 ton.
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