Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
Old 07-25-2010, 03:44 PM   #1
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,268
Mixing tread widths

Ok, I need 2 new tires and will need the other 2 replaced next winter. They are still good for this winter.

I am thinking about increasing the stock width when I replace them from the existing LT225/75R/16 E tires to LT 265/75R/16 E.

Since my truck seems to wear the front tires more, they are due for replacement now.

I was planning on putting the new 265's on the rear and moving the still good 245s from the rear to the front.

Next year, I will move the rear 265s to the front and put the new 265s on the rear. That way I will always be able to just repalace 2 at a time.

Any issues I am missing with this plan?
Will the 245 spare still be a valid and safe spare until I can get the 265 repaired or replaced?
__________________
Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
Herk7769 is offline   Reply With Quote
Old 07-25-2010, 04:45 PM   #2
Moderator Emeritus
 
MtnGuy's Avatar
 
Join Date: Sep 2008
Location: Shenandoah Valley of Virginia
Posts: 9,280
Quote:
Originally Posted by herk7769 View Post
Ok, I need 2 new tires and will need the other 2 replaced next winter. They are still good for this winter.

I am thinking about increasing the stock width when I replace them from the existing LT225/75R/16 E tires to LT 265/75R/16 E.

Since my truck seems to wear the front tires more, they are due for replacement now.

I was planning on putting the new 265's on the rear and moving the still good 245s from the rear to the front.

Next year, I will move the rear 265s to the front and put the new 265s on the rear. That way I will always be able to just repalace 2 at a time.

Any issues I am missing with this plan?
Will the 245 spare still be a valid and safe spare until I can get the 265 repaired or replaced?
Don't see a problem unless you have 4x4.
__________________

Chap , DW Joy, and Fur Baby Sango
2017 F350 Lariat CCSB, SRW, 4x4, 6.7 PS
2017 Grand Design Reflection 337RLS
MtnGuy is offline   Reply With Quote
Old 07-25-2010, 05:43 PM   #3
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,268
Quote:
Originally Posted by mtnguy View Post
Don't see a problem unless you have 4x4.
No, a 4x2
Thank you.

Thinking of Michelin LTX M/S2 LT265/75R16 E

Anyone have experience with these guys?
__________________
Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
Herk7769 is offline   Reply With Quote
Old 07-25-2010, 07:06 PM   #4
Moderator Emeritus
 
acadianbob's Avatar
 
Join Date: Mar 2008
Location: St. Paul, Minnesota
Posts: 3,365
So, I'm curious as to why you want to change your tire size. What is the perceived benefit? You are effectively changing the diameter of your tire (larger, 8% in fact) and increasing the the surface (width) of your tire. The effects of this are likely to be: 1) Your speedometer and odometer will be off unless you are able to "reprogram" your truck 2) you will increase rolling resistance with the wider face and could see a reduction in mileage 3) because of the larger diameter, you are reducing your towing capacity (effectively the equivalent of a lower numerical axle ratio, if you have a 3.73 it will become a 3.43) 4) you increase the chance of hydroplaning in heavy rain because of the extra width. You won't increase the load capacity of your truck. You can avoid SOME of these issues by going to a lower aspect ratio (if you can find it). A 265/65/16 would be close to your current circumference/diameter. Don't know if such a size exists. But if so, you would avoid 1) and 3) above. I'm not sure what benefits you would derive.
__________________
https://i421.photobucket.com/albums/pp297/acadianbob/IMG_2757.jpg
2021 F350 Lariat 7.3 4X4 w 4.30s, 2018 Wildcat 29RLX
2012 BMW G650GS, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs
acadianbob is offline   Reply With Quote
Old 07-25-2010, 07:12 PM   #5
Senior Member
 
Join Date: Jul 2007
Posts: 168
you will have abs problems with mixing different size tires. the abs will think the tires are turning at different speeds. not recommended. also spare should match beacuse if you have a flat on the rear the tire size difference will be very hard on the diff. gears as the two rear tires will have to turn at different rpms. diff gets very hot when towing on the highway and added stress of two different tires is asking for trouble.
skidoonut is offline   Reply With Quote
Old 07-25-2010, 10:42 PM   #6
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,268
Sigh

Quote:
Originally Posted by skidoonut View Post
you will have abs problems with mixing different size tires. the abs will think the tires are turning at different speeds. not recommended. also spare should match beacuse if you have a flat on the rear the tire size difference will be very hard on the diff. gears as the two rear tires will have to turn at different rpms. diff gets very hot when towing on the highway and added stress of two different tires is asking for trouble.

That's why I love this forum. Somebody always has the right answer.

Thanks Skidoonut and acadiabob for your input.

I looked at the specs for the tire and I failed to catch the difference in diameter. I thought the 245/265 was the width of the tread only and that the 75R was the diameter. I assumed since they were both 75R they would be the same diameter.

The other concerns are also valid and not thought of.
The logic for increasing the tire width was to increase the max rated load of the tire.

Looking closer at the specs for the 2 tires, you guys are flat on the money. The 245 has a diameter of 30.47 inches and turns 683 revs per mile. The 265 has a diameter of 31.65 inches and turns 657 revs per mile. That is enough to really screw with the speedometer and the computer.

The only gain would be an increase in max load at 80 PSI (what I was looking at) of only 150 pounds per tire. Not enough to justify all the downside.

Thanks again everyone


Will be getting the 245s this fall.
__________________
Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
Herk7769 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 06:16 AM.