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Old 09-13-2010, 10:26 PM   #1
LWG
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Cool Upgrade from 15" wheels to 16" wheels

I have a 2005 Wild Cat with rear bunk beds 30 ft with 15 in 6 lug wheels. 225-78-15 tires. I want to upgrade for safty reasons to 16 in wheels. 235-85-16.tires. Can this be done ? has anyone done this? Please advise
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Old 09-13-2010, 10:30 PM   #2
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You really need to do some home work. Find the overall diameter of your existing tires and find a comparable sized 16 inch tire. You will be fine. Places like this,Trailer Tires and Wheels ,
have all sorts of packages that are complete bolt on.
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Old 09-14-2010, 09:45 AM   #3
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Think you 450 Donn for your reply.Yes I don't have the figures in front of me now But the tires I have on now that came from F.R. was rated about 2300 lb. The 16 in tires I looked at were rated about 3400 lbs.Before I buy the new tires and wheels and they will not fit I wondered if some else tried to do this. The tires are 6 in apart with the 16in tire they would be 3in apart.
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Old 09-14-2010, 10:16 AM   #4
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The tires are 6 in apart with the 16in tire they would be 3in apart.
If you're OK on the wheel backspacing and tire section width (i.e., no interference on the inside or outside of the tires), then 3" is more than enough clearance between the tires. You could even go down to 1.5" to 2.0" if you needed to and still be OK.

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Old 09-14-2010, 11:12 AM   #5
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Thank you Rusty JC I am gaining more confidance in this endiver.
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Old 09-14-2010, 11:25 AM   #6
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If you talk to Scott at TrailerTiresandWheels.com, he can help you come up with a wheel/tire package that will work for you. Earlier this year, I went from LT235/85R-16G (3750 lbs @ 110 PSIG) wheels and tires to 215/75R-17.5J (4805 lbs @ 120 PSIG) wheels and tires on our 5th wheel, and the service I received from this company was excellent.

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Old 09-14-2010, 10:52 PM   #7
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This Tire size calculator will tell you exactly what each tire size change makes from OEM size. It will be of great help making your decision.
FYI, 1.5" between tandem tires is the absolute minimum clearance. Tires "grow" when they get hot and are running at highway speeds, causing them to become a larger diameter @ centerline. This according to A&R truck repair shop of Chamberlain, SD, that installed longer springs on my back axle to accomodate larger tires and maintain that 1.5".
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Old 09-15-2010, 02:50 PM   #8
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Oh, one other thing...it goes without saying (but I'll say it anyway ) - check your vertical clearance above the tire with the suspension at full jounce (compression) to be sure you have sufficient clearance for a larger diameter tire. It would be a bummer to have a tire go through the floor of a slideout if you hit a speed bump.

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Old 09-15-2010, 02:51 PM   #9
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While you are making a change in your tires go up two tire ratings. Get tires heavy enough to carry 3000 to 4000 pounds more than your trailer weighs. I have a 5th that weighs 15,000 # . I was offered E rated tires. I bought the option of G rated tires. After two blowouts in my 4th year of ownership and being a full timer who travels, I went from 16" to 17.5" tires and J rated. The G rated would carry 15,000 #. The J rated will carry 19,000 #. The 17.5" are a slightly smaller diameter tire than the 16".

IMHO most trailer tires are not heavy enough to carry the loads put upon them. I would have bought heavier if I could have found them to fit.

New tires and rims- $2800.00
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Old 09-24-2010, 03:40 PM   #10
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You really need to do some home work. Find the overall diameter of your existing tires and find a comparable sized 16 inch tire. You will be fine. Places like this,Trailer Tires and Wheels ,
have all sorts of packages that are complete bolt on.

I did the upgrade your thinking about , It is a great idea nd will end all your tire issue . My Dad has dont the same to his 5th after he saw how well it worked out for mine. The trailer is more statble at high speeds you done have the 65 mph tire max speed limit with LT truck tires ( dont get trailer tires that are made in China they are all JUNK ) . You dont get much differnace in the number the side wall says it can carry but you need to know there is a 20% safety marging bulit into any tires that are passenger rated or LT tires. Trailer tires are rated at the MAX they can carry and zero safety margins. so a tire thats a "trailer only tire" rated at 3700 lbs is the same as a truck tire that has a 3200 lb rateing. granted you cant run more weight than is listed on the side walls but I would have no worries running a LT tire at 3000+ lb on a 3200 rating because its still 20% by design . Due to the limitations of size I have 225/75/16" load range E truck tires in place of my 225/75/15" load range E trailer tires. It was mostly fender clearance issues that held me to the smaller shorter tires , these are roughy 1" taller and maybe a 1/2" wider. Size in with vary with manufactures by as much as 1" in both directions so spend the time and figure on the worst case if you blow a tire and can only get brand X ! I found the best deal on BF Goodrich commercial TA radials , 225/75/R16 LR E where only $123 per tire local . THey have a nice deep highway tread that will last 30,000+ miles and they are made here in the USA so you know production standards are HIGH and consistant. If your trailer doesnt have shocks on all wheels I would suggest you check in to see if you can add the Dexter kits to your trailer it also makes a nice improvement in ride for both the trailer and truck.

Eastern Marine down in NJ is a good company to get rims from to do your conversion, painted wheels are around $55 each plus shipping
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Old 09-26-2010, 01:14 PM   #11
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Thank you xc-mark and all. I have found a set of wheels for $42.95 each and free shipping.My local dealer said he would try to put the 235/85/16 on but if not enough room he thought the 225/75/16 would fit just fine. So I have some one that would work with me.Again I thank all of you for your input Thank you .
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