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Old 03-13-2018, 08:47 PM   #1
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2001 Solaris T-2975 Tore size

Hello all, picked up a nice, albeit dirty 2001 Sunline Solaris T-2975 TT. Bought it as a starter trailer for me and the family. It has passenger car tires on it now and read this is usually a no-no so was wondering what is the correct tire size? Also can I go up to a certain size to gain some ground clearance. Also what pressures are they supposed to be run at. The “owners manual” doesn’t offer much in the way of this information.
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Old 03-14-2018, 02:04 PM   #2
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Hi Minidoc,

Welcome to Sunline Owners Club and congrats on your new Sunny.

Yes you are correct, P rated car tires are a no no on trailers.

I looked up the 2001, T-2975 and it is a 7,000# GVWR camper. Can you look on the tires that are on there now, what size are they? 14" or 15"? In 2001 they might be either. I do not know what exact year they stopped using the 14" but by 2004 they were on 15" as the smallest.

There is a VIN tag on the front left side of the camper. It may call out the exact tire size that Sunline put on it. But... unless someone put UV treatment on the sticker it may be so faded you cannot read it.

If they are 14" rims, the size would be ST205 75/R14's load range C, 50psi max at 1,760# rating.

If they are on 15" rims, the size would be ST205 75/R15's load range C, 50psi max at 1,820# rating.

Rims, the rims need to be zero offset or the rim/tire my rub the camper. Not knowing what the prior owners mounted on there, if they used the original rims, then life is good and just change tires. If they have some kind of offset rim, that can be a problem.

The rims on the 15" tire would be 15" x 5" wide, 5 holes on 4 1/2" centers, zero offset. I just bought 4 of these myself last spring for my 2004 T-1950 as they where rusted out. https://www.etrailer.com/Tires-and-W...r/AM20422.html

If you are wanting a tire brand recommendation here are 2 that I have used with acceptable results on ST trailer tires. You are wanting a ST (Special Trailer) tire regardless of brand and ideally it is a radial tire, not a bias tire. The spare tire needs to match the 4 good ones on the camper. The link will have the correct tread/style and type of tire.

Maxxis ST radial M8008 ST Radial M8008 | Maxxis Tires USA

Carlisle ST radial trail HD https://www.carlislebrandtires.com/o...adial-trail-hd

Hope this helps

John
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Old 03-14-2018, 02:16 PM   #3
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Quote:
Originally Posted by MINIDOC View Post
Also can I go up to a certain size to gain some ground clearance. Also what pressures are they supposed to be run at. The “owners manual” doesn’t offer much in the way of this information.
Hi again,

The tire pressure on trailer tires is to run them at max cold side wall pressure. (it is stamped on the sidewall of the tire) They need all that pressure to carry the load of the camper and keep them cool.

To gain more ground clearance, you do what is called and axle under over flip. Meaning you move the axle tube from under the springs to on top of the springs. This lifts the entire camper. Many of our forum members have done this on the low rider campers. Dexter axle sells a kit with U bolts and extra axle seats to do the lift.

The way the suspension is made on these campers, you really cannot go to the next size tire and have all the correct bump clearances (tire to underside of fender well). So they due the nick named "axle flip"

Here are "some" of the posts on axle flipping.... You need to deal with the entry step and possible a new weight distribution hitch shank so the camper tow level after doing the flip. While there always seems to be a lot of discussion on, do I do a flip? I do not recall anyone stating the had to ever go back to no flip.

Dexter Axle Over-Under Conversion Kit

axle flip decision

Did the axle flip!

Axle flip

Flip My Axle #2753

1st Mods. Axle Flip & Maxxairs

Doing the flip!

flipping axles!

Hope this helps

John
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Current Sunlines: 2004 T310SR - Fern Blue, 2004 T1950 - Fern Blue, 2004 T2475 - Nutmeg
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

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