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Old 09-07-2011, 10:55 PM   #21
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Don't want to sound like an ad for them but I have put a few sets of Firestone Transforce AT tires on our trucks and they are LT load range E and work great for long service life (about one year or 100,000 km per truck) they are perfect towing, or loaded for bear. I think other companies may make similar ones but I havent tried anything that worked as well. One of our trucks (Tundra) came with P rated tires and I swapped them off after just 60,000 km, badly worn and I just didn't trust them anymore. I don't know if other people put their trucks and tires through what I do (driving heavy loads on them all day long every day) but if you do don't stick with the P's go LT and if you want to save a lot of money on long term tire replacement, spend a lot of short term money on tire replacement $0.02 won't get you a valve stem though.
good info - the unfortinate part for him is that there are not many LT choice's in a 20" tire - he will have some homework cut out for herself
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Old 09-07-2011, 10:57 PM   #22
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Might just change to 17"
Better tow ratio
And... I'm not an him
Am a her
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Old 09-07-2011, 11:00 PM   #23
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P275/60R17 110T BFGoodrich® Long Trail T/A® Tour
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Old 09-07-2011, 11:07 PM   #24
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Might just change to 17"
Better tow ratio
And... I'm not an him
Am a her
Oops - I apologize - didnt realize you were a Lady - I just assumed which was a bad assumption on my part

you will have alot better tire choices in the 17's - bad part though is it will have more side wall to flex and your ride will be mushier then what you have with the 20's.

the 275/60/20 is a 33" tire in case you didnt know
Also check your truck to see if it has the 3.55 or 3.92 gears - have noticed alot of the new trucks have the 3.55 gears with the 20's where my truck came with 3.92's with the 20's.

I am running 18"s and wished I was still running the 20's - I got such an awesome deal on the 18's I couldnt pass them up.
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Old 09-07-2011, 11:10 PM   #25
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P275/60R17 110T BFGoodrich® Long Trail T/A® Tour
that tire size is smaller then what you are presently running for tire size

use this to help with matching tire sizes:
Tire size calculator

hope you dont take this the wrong way - you do know you will need to get new rims to accomodate a 17" tire right?

as I wait for her to call me the idiot for asking that question
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Old 09-07-2011, 11:12 PM   #26
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And... I'm not an him
Am a her
When it comes to towing it's not what's in your shorts that counts but what's under the hood and what is between your ears.

I forgot the part about 20" rims, I guess you are stuck with what ever rubber bands they are putting on bmw's My truck has old school but selection rich 16" rims (got two sets for easy switch overs to winter tyres)

I don't understand though how 17" rims give better "tow ratio" than 20", is the overall diameter of the tire not going to remain a constant? if the gears in the rear diff are the same, and the gearing in the tranny is also unchanged in gearing then the ratio of each axel revolution to ground covered stays the same with an identical circumference?
If you don't keep the same circumference though you will have to recalibrate the speedo and odo. There must be a thread about all this already.
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Old 09-07-2011, 11:20 PM   #27
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When it comes to towing it's not what's in your shorts that counts but what's under the hood and what is between your ears.

I forgot the part about 20" rims, I guess you are stuck with what ever rubber bands they are putting on bmw's My truck has old school but selection rich 16" rims (got two sets for easy switch overs to winter tyres)

I don't understand though how 17" rims give better "tow ratio" than 20", is the overall diameter of the tire not going to remain a constant? if the gears in the rear diff are the same, and the gearing in the tranny is also unchanged in gearing then the ratio of each axel revolution to ground covered stays the same with an identical circumference?
If you don't keep the same circumference though you will have to recalibrate the speedo and odo. There must be a thread about all this already.
I can answer your questions - this info goes for a Dodge - not sure about Chevy and Ford's though
the newer trucks have what is called a pinion factor which is calculated by the PCM so to get the speedo corrected the dealer would have to correct that by reprogramming the PCM for the new tire size or could get a superchips to reprogram that as well - the days of the gear in the side of the tranny is gone - everything is computer controlled now in the newer trucks.
Also when they adjust for the tire size it will also adjust for the ABS as well.
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2004 Dodge Ram 1500 Qaud Cab 4x4 with 35" tires and 3.92 gears, Dynatech Longtube Headers & Fabtech 6" lift + Superchips with shift Tuning
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Old 09-07-2011, 11:20 PM   #28
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Originally Posted by sherdep View Post
oops - i apologize - didnt realize you were a lady - i just assumed which was a bad assumption on my part

you will have alot better tire choices in the 17's - bad part though is it will have more side wall to flex and your ride will be mushier then what you have with the 20's.

The 275/60/20 is a 33" tire in case you didnt know
also check your truck to see if it has the 3.55 or 3.92 gears - have noticed alot of the new trucks have the 3.55 gears with the 20's where my truck came with 3.92's with the 20's.

I am running 18"s and wished i was still running the 20's - i got such an awesome deal on the 18's i couldnt pass them up.
3:55
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2010 Ram 1500 HEMI with integrated brake controller, tow mirrors and Michelins LTX/AT2 275/65R20 max load: 3750 lbs. @ 80 psi but we keep them 50-55 psi
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Old 09-07-2011, 11:25 PM   #29
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Originally Posted by sherdep View Post
that tire size is smaller then what you are presently running for tire size

use this to help with matching tire sizes:
Tire size calculator

hope you dont take this the wrong way - you do know you will need to get new rims to accomodate a 17" tire right?

as I wait for her to call me the idiot for asking that question
I think that I'll tow a while with the 20's and see what it feels like. If I find it ok, I'll get proper tires to tow with or if not, then get a new truck? Jus kidding, get the 17 and (rims...)
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2013 Jayco Eagle HT 23.5
2010 Ram 1500 HEMI with integrated brake controller, tow mirrors and Michelins LTX/AT2 275/65R20 max load: 3750 lbs. @ 80 psi but we keep them 50-55 psi
Superglide 2700
Timbrens
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Old 09-07-2011, 11:28 PM   #30
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3:55
I know your truck is rated for more horsepower then mine is (Mine is rated at 345hp) so that may be the diffrence of why you have the 3.55 with the 20's - for better fuel economy at highway speeds plus you have MDS which cuts off 4 cylinders or two banks if I remember correctly.

I say drive it with 20's and see how it performs - I know Labzy is running the same setup as you are except she has a Mini Lite 2306 - you might be able to get some info from her on driveability issues if she has any - she does her homework so she will tell what she has dealt with.
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