Tire Diameter Torque Ratio?
#1
12-29-2017
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Location: California
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Tire Diameter Torque Ratio?
Hello,
I have a 3 inch lift on my 1999 4.0 V6 2wd . Spindle lift and heavy duty leaf springs with increased arch.
I plan on towing and doing some off road, so I want E rated all-terrain tires.
I'm planning on getting LT265/75R16
These: Baja ATZ P3 ? Mickey Thompson Tires & Wheels
Am I going to lose considerable torque and towing capabilities by picking a larger diameter tire?
What rims do you reccommend?
I have a 3 inch lift on my 1999 4.0 V6 2wd . Spindle lift and heavy duty leaf springs with increased arch.
I plan on towing and doing some off road, so I want E rated all-terrain tires.
I'm planning on getting LT265/75R16
These: Baja ATZ P3 ? Mickey Thompson Tires & Wheels
Am I going to lose considerable torque and towing capabilities by picking a larger diameter tire?
What rims do you reccommend?
Last edited by RangerSlamz; 12-29-2017 at 08:01 PM.
#2
12-30-2017
Tire/ratio calculator here: </TITLE> <link rel="icon" href="favicon.ico" type="image/gif" /> <script LANGUAGE="JavaScript"> </script> <STYLE TYPE="text/css" /> </STYLE> </HEAD> <body bgcolor="#000000" text="#000000" link="#000080" vlink="#000080" alink="#000080"> <html> <head>
As an example
New tires = 32" diameter
Stock tires = 28"
Current rear ratio = 3.73
Actual ratio after larger tires are installed = 3.26
If you changed differential ratio to 4.26(or close) your actual ratio would be back at 3.73
If you do not know your current rear ratio look here: Ford 7.5 & 8.8 Inch Axle Tag & Door Codes : The Ranger Station
Yes, taller tires lowers rear ratio so makes towing harder also less off-the-line acceleration.
But better MPG at highway speeds because of lower RPM
Also speedometer will be off
As an example
New tires = 32" diameter
Stock tires = 28"
Current rear ratio = 3.73
Actual ratio after larger tires are installed = 3.26
If you changed differential ratio to 4.26(or close) your actual ratio would be back at 3.73
If you do not know your current rear ratio look here: Ford 7.5 & 8.8 Inch Axle Tag & Door Codes : The Ranger Station
Yes, taller tires lowers rear ratio so makes towing harder also less off-the-line acceleration.
But better MPG at highway speeds because of lower RPM
Also speedometer will be off
#3
12-30-2017
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Location: California
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Thanks. So I did end up figuring out I have 3.55. I have more questions in another thread I just started that perhaps you could help with. https://www.ranger-forums.com/drivet...towing-153029/
Basically I need to know what gearing I should upgrade to and what my options are. I was originally going to install a lunchbox as well.
Basically I need to know what gearing I should upgrade to and what my options are. I was originally going to install a lunchbox as well.
#4
12-30-2017
Off-road in a 2 wheel drive? I would look at a 410 or 430 with a locker style differential as the open one you currently have will not cut it and a limited slip is just not good enough. You also need to get a receiver mount wench and install a receiver on the front and on the back if you don't already have one. Also get a high lift jack, shovel, tow strap, pintle hook to fit the receiver, and a good pair of gloves.
The receiver wench will allow you to pull yourself out from either end if you can reach something solid enough to attach to. The pintle hook will be a pulling point for either end to attach the tow strap. The jack and shovel are for the times when there is nothing to hook your winch to. The gloves will come in handy with all of the above.
When you start pricing this out go ahead and price out what it would cost to sell your current truck and get a 4x4 that has LS.
The receiver wench will allow you to pull yourself out from either end if you can reach something solid enough to attach to. The pintle hook will be a pulling point for either end to attach the tow strap. The jack and shovel are for the times when there is nothing to hook your winch to. The gloves will come in handy with all of the above.
When you start pricing this out go ahead and price out what it would cost to sell your current truck and get a 4x4 that has LS.
#5
12-30-2017
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Location: California
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Thanks
Yeah, not really off road for sport though. Just occasionally around mild terrain/sandy country ranch roads mostly. I did just get a winch too; any specific recommendation on mounts?
I have considered a 4x4 but I invested a lot of money and time into this truck, so it's basically a project/hobby truck for me now to learn with. And it has a salvage title, so the money I would get from it is just a dent for another truck. I imagine I will get another truck in the future, but I figure I might as well see what I can do with this one for now.
Yeah, not really off road for sport though. Just occasionally around mild terrain/sandy country ranch roads mostly. I did just get a winch too; any specific recommendation on mounts?
I have considered a 4x4 but I invested a lot of money and time into this truck, so it's basically a project/hobby truck for me now to learn with. And it has a salvage title, so the money I would get from it is just a dent for another truck. I imagine I will get another truck in the future, but I figure I might as well see what I can do with this one for now.
#6
12-30-2017
If you are going to be running out in the desert the 2wd with a locker would be enough. A limited slip has clutches and it needs to be serviced regularly or it does not work. Sandy terrain can be just a treacherous as slick gumbo mud.
I like the receiver mount front and rear with the wench stowed in a bed box. That way it sits in the garage when I am not leaving the asphalt. The jack, shovel, and gloves are just as important. When I had my 4x4 and I got stuck there were a couple of times I pulled up every tree I could reach with my cable. Sometimes you get stuck and have nothing you can attach a wench to. If you have a shovel you can eventually dig yourself out.
I like the receiver mount front and rear with the wench stowed in a bed box. That way it sits in the garage when I am not leaving the asphalt. The jack, shovel, and gloves are just as important. When I had my 4x4 and I got stuck there were a couple of times I pulled up every tree I could reach with my cable. Sometimes you get stuck and have nothing you can attach a wench to. If you have a shovel you can eventually dig yourself out.
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