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Old 04-09-2015, 10:40 AM   #1
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Sport 295 wheel upgrade - 15"

Anybody ever try upgrading their 14" wheels to a 15" setup on the SP295 or 296?

We just had a blowout on two year old Maxxis 14" C rated tires on a 4 hour return trip. Drivers side front tire blew up with minor damage to the camper. After having a blowout a few years ago on a different camper I was pretty anal about setting this camper up with what I thought were the best tires I could find. I also check pressures before every tow and keep the speed down to 65. I see no reason why a 2yr old tires should have blown with no obvious damage to the tire prior - no curbing, no big pot holes, covered during storage, etc.

I really think a C rated tire is borderline for this size camper. Fully loaded on a CAT I am at 6500-6800# depending on what trip we take. I had around 9 trips on these tires.

I know Kuhmo offers a D rated 14" now and may go that route but thought my options would really open up going to a 15" size. Just seems a bit tight under the camper and dont want to run into clearance issues.

So anyone done it? If so, what tire and size?
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Old 04-09-2015, 08:10 PM   #2
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Clearance between the tires could be a problem. Start by finding out the overall inflated diameter of each to check clearance between and clearance to the camper.
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Old 04-09-2015, 08:50 PM   #3
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That is my main worry, especially if the axles start articulating over a rough site. I thought I read somewhere that 2" was the min required clearance but now I cant find that reference anywhere.
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Old 05-18-2015, 10:08 AM   #4
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For those wondering, 15" wheels do fit as do much larger tires!

See photo. 15x7 trailer wheels mounted with LT Goodyear Wrangler HT in Load Range D - 215/75-15. The spacing is tight around the trim and back wall but I can get my fingers in the gap of both.

I now have an extra 1200# in load capacity in my tires and no goofy speed restrictions. I normally keep at 65mph anyway but I like to have the margin of safety. Read lots of praise for these tires for trailers so we'll see how it goes. Tread depth is quite deep so I hope they dont start chunking during tight turns.

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Old 05-19-2015, 09:32 AM   #5
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That is the exact upgrade I want to do...
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Old 06-01-2015, 02:36 PM   #6
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Quote:
Originally Posted by CHD Dad View Post
For those wondering, 15" wheels do fit as do much larger tires!

See photo. 15x7 trailer wheels mounted with LT Goodyear Wrangler HT in Load Range D - 215/75-15. The spacing is tight around the trim and back wall but I can get my fingers in the gap of both.

I now have an extra 1200# in load capacity in my tires and no goofy speed restrictions. I normally keep at 65mph anyway but I like to have the margin of safety. Read lots of praise for these tires for trailers so we'll see how it goes. Tread depth is quite deep so I hope they dont start chunking during tight turns.

How much clearance do you have between the tire and the wheel well?
The inside clearance?
thank you!
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Old 06-01-2015, 04:36 PM   #7
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How much clearance do you have between the tire and the wheel well?
The inside clearance?
thank you!
On the inside clearance I would say maybe an inch. Sorry camper isnt parked here right now. I could get my fingers in there but not much more than that. Plenty of room above the tires.

I dont anticipate much side to side flex or movement. If the tire moves that much I have bigger problems to deal with!
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Old 06-01-2015, 10:59 PM   #8
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On the inside clearance I would say maybe an inch. Sorry camper isnt parked here right now. I could get my fingers in there but not much more than that. Plenty of room above the tires.

I dont anticipate much side to side flex or movement. If the tire moves that much I have bigger problems to deal with!
Thanks!
That's about what I have w the 14in wheels now... Really looking forward to upgrading, mine is a 2011 and have been looking for an excuse to do it.
It's really been a great rig my only pet peeve is the tires. I'd love the D rated 15s.
Where did you get them if you don't mind me asking?
Db
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Old 06-02-2015, 10:45 AM   #9
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Originally Posted by brownie289 View Post
Thanks!
That's about what I have w the 14in wheels now... Really looking forward to upgrading, mine is a 2011 and have been looking for an excuse to do it.
It's really been a great rig my only pet peeve is the tires. I'd love the D rated 15s.
Where did you get them if you don't mind me asking?
Db
I ended up buying them locally from a small local tire shop. I had heard good things about them and they got really close to Tire Racks price on both the wheels and tires so just used them.

Keep in mind if you do this - buy FIVE so you have a spare! They look at you funny when you order until you explain why you need 5 wheels and tires. The spare mounted right up where the old one sat.

I cant remember exact numbers but I think with all 5 mounted and balanced with metal valve stems (so I can use TPMS sensors) ran a little under $1300 out the door. I know the wheels were $95/ea plus freight.
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