Reply
 
Thread Tools Display Modes
Old 03-21-2018, 08:21 AM   #1
Half-Timer
 
Join Date: May 2014
Posts: 88
Tire 235 85/16 vs 235 80/16

I am thinking of replacing my 235 80/16 tires with 235 85/16. My reason is a slight (`400 lbs) increase in max load per tire. The 85's have a one inch increase in diameter (1/2 inch radius) so I do not see any negative effects. There is a slight increase in price but I believe the added max load is worth the extra cost.

Does anyone have experience in going to 85 vs 80 tires?

I have a 2017 Sierra 378 FB.
__________________

__________________
Enjoying God's creation each day.

2015 Ram 3500 Laramie Limited with 6.7L Cummins Diesel
Forest River Sierrra 378FB
ptylerp is offline   Reply With Quote
Old 03-21-2018, 08:41 AM   #2
Phat Phrog Stunt Team
 
AquaMan's Avatar
 
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 7,114
You would be better off going up in load rating than in size, assuming that both tires were of the same load rating just different specs. If going up in load rating, make sure your rims can handle the pressure.
__________________

__________________
2016 Georgetown 364TS
2017 Jeep Rubicon Recon toad
Nights Camped 2019 - 17
AquaMan is offline   Reply With Quote
Old 03-21-2018, 08:57 AM   #3
Half-Timer
 
Join Date: May 2014
Posts: 88
Looking at Goodyear endurance and they only come in Load range e.
__________________
Enjoying God's creation each day.

2015 Ram 3500 Laramie Limited with 6.7L Cummins Diesel
Forest River Sierrra 378FB
ptylerp is offline   Reply With Quote
Old 03-21-2018, 09:22 AM   #4
Junior Member
 
Join Date: Nov 2017
Posts: 16
I replaced my Chinese ST 235 80/16 E to Michelin RIB LT 235 85/16 E back in 2006 on my 5th wheel. I've pulled thousands of miles with no negatives to report. I've replaced the RIBs due to age but not mileage or other effects (most of the tread-depth remained). As long as you have the physical spacing between axles to handle the increased diameter and the tires meet the weight requirements, I'd go for it. By the way, the tire weight of the RIBs is significantly heavier than the Chinese OEM tires. Inflation is the same for either,80 psi.
wlstroud is offline   Reply With Quote
Old 03-21-2018, 09:26 AM   #5
Senior Member
 
Jim34RL's Avatar
 
Join Date: Feb 2015
Location: Oswego il
Posts: 1,737
Quote:
Originally Posted by ptylerp View Post
I am thinking of replacing my 235 80/16 tires with 235 85/16. My reason is a slight (`400 lbs) increase in max load per tire. The 85's have a one inch increase in diameter (1/2 inch radius) so I do not see any negative effects. There is a slight increase in price but I believe the added max load is worth the extra cost.

Does anyone have experience in going to 85 vs 80 tires?

I have a 2017 Sierra 378 FB.
You should measure the rolling tire clearance between the frame, sidewall and between both tires to insure proper fit. Also make sure that the rim will except the tire profile. The tire dealer should be able to provide these dimension to you.

On one of my previous campers I switched out the ST Power King tires, ST235/80R/16 to a Michelin XPS RIBS, LT245/75R/16E. The tires had a slightly different rolling radius and I made several measurements before buying the new tires to insure clearance and fit. They worked very will along with a higher load rating than the pervious Power Kings that came with the trailer.
__________________
Jim W.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67, TDR 123K+miles
Jim34RL is offline   Reply With Quote
Old 03-21-2018, 01:36 PM   #6
Blog: RVroadtripper.com
 
hbillsmith's Avatar
 
Join Date: Jul 2012
Location: Near Dallas Texas
Posts: 928
Here's some recent research I did on this subject. Note that you can run the popular Sailun 235/80/16 at 80psi and they are Load Range E with 3,480 lbs carry capacity. If your wheels are rated for 110psi, you can run the same tire at 110psi and they are Load Range G with 4,080 lbs. carry capacity. I currently run the Maxxis and have had good experience with them. I'm on my second set of Maxxis simply because I wanted to change them early (@12,000 miles) before I head to Alaska.
Attached Thumbnails
Click image for larger version

Name:	Compare Five ST and LT Tire Specs.jpg
Views:	126
Size:	450.6 KB
ID:	165825  
__________________
2016 Wildcat 295RSX - 2015 GMC 2500HD DblCab Duramax/Allison 4x4 Z71 6.6' Bed
Maxxis 235/80/16E; AirBags w/AirLift 1 wireless compr; 4-Fold Tonneau; 6000# Dexters; mor/Ryde Rubber Pinbox & CRE3000 w/HD Wetbolts; Andersen UltimateII Aluminum 5erhitch on Reese Flipball w/Curt 4" offset ball; LCI Ground Control3 4pt+2pt Elec.Rear stabilizers; 3 Slidecovers; King Dishtailgater; 10ft. Portabote w/5hp Outboard; Dual A/C; Furrion48 Rearcam; Champion 3100 Inverter w/DIY Extended Run
hbillsmith is offline   Reply With Quote
Old 03-21-2018, 02:37 PM   #7
Senior Member
 
Airdale's Avatar
 
Join Date: Jul 2013
Posts: 1,201
Quote:
Originally Posted by Jim34RL View Post
You should measure the rolling tire clearance between the frame, sidewall and between both tires to insure proper fit. Also make sure that the rim will except the tire profile. The tire dealer should be able to provide these dimension to you.

On one of my previous campers I switched out the ST Power King tires, ST235/80R/16 to a Michelin XPS RIBS, LT245/75R/16E. The tires had a slightly different rolling radius and I made several measurements before buying the new tires to insure clearance and fit. They worked very will along with a higher load rating than the pervious Power Kings that came with the trailer.
Notes and references for future endeavors:

1: All LT245/75R16E sized tires have a minimum rim width requirement of 6.5".

2: https://www.michelinman.com/US/en/he...res.html#tab-4
__________________
A Trailer Tire Poster
http://www.irv2.com/photopost/showfull.php?photo=15339
Airdale is offline   Reply With Quote
Old 03-21-2018, 02:41 PM   #8
Senior Member
 
Airdale's Avatar
 
Join Date: Jul 2013
Posts: 1,201
Quote:
Originally Posted by wlstroud View Post
I replaced my Chinese ST 235 80/16 E to Michelin RIB LT 235 85/16 E back in 2006 on my 5th wheel. I've pulled thousands of miles with no negatives to report. I've replaced the RIBs due to age but not mileage or other effects (most of the tread-depth remained). As long as you have the physical spacing between axles to handle the increased diameter and the tires meet the weight requirements, I'd go for it. By the way, the tire weight of the RIBs is significantly heavier than the Chinese OEM tires. Inflation is the same for either,80 psi.
Michelin considers that a misapplication of their tire. The reference points out why.

https://www.michelinman.com/US/en/he...res.html#tab-4

Note: The Michelin XPS Ribs are retreadable.
__________________
A Trailer Tire Poster
http://www.irv2.com/photopost/showfull.php?photo=15339
Airdale is offline   Reply With Quote
Old 03-21-2018, 03:44 PM   #9
Member
 
Join Date: Jun 2013
Posts: 43
Switch to bigger tire 80 vs 85

I did that last year. Was the best thing I ever did. Gave piece of mind due to more load carrying capacity. No problem with heat buildup. Rode great and pulled great. Little bigger diameter did not make any difference on clearance.
So if clearance is not a problem, my advice is to go for it.
dlewand53 is offline   Reply With Quote
Old 03-21-2018, 05:23 PM   #10
Senior Member
 
CaptnJohn's Avatar
 
Join Date: Dec 2015
Location: Eastern NC
Posts: 3,597
I replaced my Rainier ST 235 80/16 E after pulling 43 miles with Sailun 235/85/16. All fit and pull great! Actually, the 85 were only 4 months old and $10 less the 80 each.
__________________

__________________
2019 Montana 3761 FL
2019 F350 6.7 4X4 LB Dually
Edgewater 205 EX 150 Yamaha
CaptnJohn is offline   Reply With Quote
Reply

Tags
tire

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.




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 05:20 AM.