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Old 07-03-2015, 06:34 PM   #1
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Tire size change on 325RES

Want to get some input on this subject. Probably going to change out the original 235/80r16 tires to 235/85r16. Has anyone done this change on their 325RES? Or any crusader, wondering if there is enough space between tires. Any advice would be helpful.
Planning on getting either Michelin RIBS or BF Goodrich commercial . Thanks
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Old 07-10-2015, 08:09 PM   #2
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My Crusader came with 235/80R16. I refused to buy with the Chinese tires on it so dealer took like new BFG Commercial 225/&5R16's from my old rig and installed them Shortly after I had a thrown belt that did slight damage and 2 others with a crown that was a result of broken belts. Two dealers said BFG should warranty them because there was no evidence of a road hazard. When I called BFG their first question was " what year and make of my vehicle?" When I said they were on my camper I got a lecture on misapplication and LT tires are not recommended and a hazard on campers. Warranty denied. I have heard of others being warranted. I went with 245/75R 16

Firestone Transforce. They were cheaper than the BFG's. I have a new set of Coopers HT3 on my truck. Also cheaper that the BFG's. RV.Net forum has positive reviews of both tires on 5th wheels. Some people have problems with Michelin's cracking and not being covered under a warranty. Others have not had that problem. Ribs are an exception tire but,IMO, an overkill on a fith wheel. Some people like the Duravis. Supposedly near equal to the Ribs but much less in cost.

I have the 330MKS and tires have plenty of room. Previous and current RV have 200# axles. Good Luck.
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Old 07-12-2015, 08:39 PM   #3
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245-75-16 are the same diameter and a touch wider. Been using lt tires for a full year. No looking back.
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Old 07-19-2015, 02:16 PM   #4
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We have a Sanibel 3600. The ST 235/85R16F from Carlisle fit and have a load rating of 3960 lbs. @ 95psi. Have the tires balanced to reduce side wall flexing at highway speed. The Carlisle F load rated tire is less money than the G load rated tires and still provides an 12% extra load capacity above the Sanibel's 7,000 lbs axle weight rating. If I keep my weight under 6,300 lbs. per axle, I'll have a minimum 10% safety margin for the axle and 20% safety margin for the tires.
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Old 07-22-2015, 11:14 PM   #5
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Originally Posted by Tiggerdad View Post
My Crusader came with 235/80R16. I refused to buy with the Chinese tires on it so dealer took like new BFG Commercial 225/&5R16's from my old rig and installed them Shortly after I had a thrown belt that did slight damage and 2 others with a crown that was a result of broken belts. Two dealers said BFG should warranty them because there was no evidence of a road hazard. When I called BFG their first question was " what year and make of my vehicle?" When I said they were on my camper I got a lecture on misapplication and LT tires are not recommended and a hazard on campers. Warranty denied. I have heard of others being warranted. I went with 245/75R 16

Firestone Transforce. They were cheaper than the BFG's. I have a new set of Coopers HT3 on my truck. Also cheaper that the BFG's. RV.Net forum has positive reviews of both tires on 5th wheels. Some people have problems with Michelin's cracking and not being covered under a warranty. Others have not had that problem. Ribs are an exception tire but,IMO, an overkill on a fith wheel. Some people like the Duravis. Supposedly near equal to the Ribs but much less in cost.

I have the 330MKS and tires have plenty of room. Previous and current RV have 200# axles. Good Luck.
Any replacement tire - any design - with less load capacity than the OE tires provide is going to get the misapplication flag and zero warranty coverage.
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Old 11-28-2015, 10:31 AM   #6
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I am in the same boat as OP just had my second tire separation on the tow maxs. Curious if anyone has moved up to a 235 85 16 on a 325res and how it worked out.

Thanks, Rick
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Old 11-28-2015, 04:10 PM   #7
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I am in the same boat as OP just had my second tire separation on the tow maxs. Curious if anyone has moved up to a 235 85 16 on a 325res and how it worked out.

Thanks, Rick
What do you mean by "moving up?

There are a lot of different types & load capacities for the basic tire size you have displayed above.

ST235/85R16E Rated at 3640# @ 80 psi
ST235/85R16F Rated at 3960# @ 95 psi
ST235/85R16G Rated at 4050# @ 110 psi

LT235/85R16E Rated at 3042# @ 80 psi
LT235/85R16G Rated at 3750# @ 110 psi (Requires a minimum rim width of 6&1/2")
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Old 11-28-2015, 04:24 PM   #8
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What do you mean by "moving up?

There are a lot of different types & load capacities for the basic tire size you have displayed above.

ST235/85R16E Rated at 3640# @ 80 psi
ST235/85R16F Rated at 3960# @ 95 psi
ST235/85R16G Rated at 4050# @ 110 psi

LT235/85R16E Rated at 3042# @ 80 psi
LT235/85R16G Rated at 3750# @ 110 psi (Requires a minimum rim width of 6&1/2")
I am referring to 80 to 85. I plan on going to a load range f tire.
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Old 11-28-2015, 04:44 PM   #9
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I am referring to 80 to 85. I plan on going to a load range f tire.
The ST235/80R16 does not have a load range F.

ST235/80R16D is rated at 3000# @ 65 psi

ST235/80R16E Can be rated at 3420#, 3500# or 3520# all at 80 psi - different manufacturers have different load capacities assigned to their ST235/80R16E tires. Without specific instructions from the vehicle manufacturer they all default to the 3420# rating by regulations.
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Old 11-29-2015, 02:19 AM   #10
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Quote:
Originally Posted by rhollar View Post
Want to get some input on this subject. Probably going to change out the original 235/80r16 tires to 235/85r16. Has anyone done this change on their 325RES? Or any crusader, wondering if there is enough space between tires. Any advice would be helpful.

Planning on getting either Michelin RIBS or BF Goodrich commercial . Thanks

I had the same size tire and jumped up rims and tires to 17.5" wheels and LR J tires. I actually gained a bit of clearance between the wheels as the 17.5" tire is a shorter sidewall and smaller overall diameter by about 1/2".

I now have something like 4,700 lbs. capacity on each tire.
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