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Old 07-23-2016, 01:32 PM   #1
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Move to larger tire size??

I have a 2016 Forester 3011DS, which comes with 16in tires.

Was wondering if anyone has upgraded their tires and wheels to a larger size and what (if any) effect it had on handling, performance, ride, etc etc. ???

Research (google is my friend) says that I most likely want to stay with same wheels but can go up in size by 1in (to 17's). Should increase ride and handling without much change in performance (or sppedo).

Wonder what others have found out.
All comments and suggestions appreciated.
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Old 07-23-2016, 01:41 PM   #2
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Quote:
Originally Posted by Oregon View Post
I have a 2016 Forester 3011DS, which comes with 16in tires.

Was wondering if anyone has upgraded their tires and wheels to a larger size and what (if any) effect it had on handling, performance, ride, etc etc. ???

Research (google is my friend) says that I most likely want to stay with same wheels but can go up in size by 1in (to 17's). Should increase ride and handling without much change in performance (or sppedo).

Wonder what others have found out.
All comments and suggestions appreciated.
Your #1 concern is Can you go up in size and have equal or greater load capacity. I am guessing you have something like LT235/85R16 LR-E

What are your measured load on F & R axles?

What performance do you not like with current tires?
What is your current Cold Inflation pressure

I have a number of posts on my blog on tire size and how to change.

Don't know how you "stay with same wheels but can go up in size by 1in (to 17's)"

Speedo is directly affected by tire OD.

I bet the web sites you were looking at were talking about changing size for passenger tires not LT tires.
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Old 07-23-2016, 02:47 PM   #3
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As long as your tire overall diameter doesn't change, your speedo will be correct. Saying that, to keep the same od, you will have less sidewall.
Thus making for a stiffer ride.


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Old 07-23-2016, 03:00 PM   #4
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I would throw a suggestion out there. Rickson Wheel 17.5" wheels. Not cheap, but the way I would go.

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Old 07-23-2016, 08:02 PM   #5
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Originally Posted by Kenny kustom View Post
As long as your tire overall diameter doesn't change, your speedo will be correct. Saying that, to keep the same od, you will have less sidewall.
Thus making for a stiffer ride.


2016 Sabre 36QBOK
2015 Ram 3500 CUMMINS
Same OD but bigger wheel = less load capacity. I am guessing you are near the max already
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Old 07-24-2016, 05:29 PM   #6
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I would steer clear of cast aluminum wheels. They will be heavier and as the other op stated, will likely not be able to carry the same load.

17 inch forged Alcoa wheels will hold more weight per wheel than the current steel wheels and the net weight gain should be negligible. A forged aluminum wheel will drop unsprung weight when holding the same size and will normally allow you to go up one wheel size without a large weight penalty and a reduction in CCC. Every pound you add in unsprung wheel weight will drop your CCC by 4 pounds. Aluminum wheels have been reported to give a smoother ride thanks to their trueness. I looked at a wheel swap myself, sticking with the same size wheel. A same size swap would net an 85 lb drop in unsprung weight. Going up an inch in size added a few pounds per wheel but the added material in the tires needed to carry the same weight would cause another bump in unsprung weight for the aluminum wheel / tire combo. The replacement inner steel wheels will add some weight on top of the added rubber weight. IMO increasing the rim size just wasn't worth the potential loss in 100 - 200 lbs of CCC.

If you're planning on upping the brakes, spring packs, axles etc to punch up the CCC capacity to the old E550 stats then the rim swap would make some sense. Of course that would be the cheap part of the work at that point



The major down sides to a forged aluminum wheel are:

A lack of wheel selection

Cost (1200 - 1600 for a set of 4 16" wheels)

Added thickness of the rims prevents using 4 on the back due to a lack of wheel stud length, wheel well

Aluminum tends to fracture instead of bend. If you smack a curb hard enough to bend a steel wheel you might end up destroying the aluminum wheel. The steel wheel can be repaired, the aluminum wheel will likely need to be replaced.
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Old 07-24-2016, 09:12 PM   #7
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Quote:
Originally Posted by Tireman9 View Post
Same OD but bigger wheel = less load capacity. I am guessing you are near the max already

Not necessarily.
I could put 19.5's on my ram, and jump up a fair bit in load capacity with g rated tired.



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Old 07-25-2016, 08:09 AM   #8
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I have the same unit and just found out I have air shocks. This may help your ride. My unit appears to bottom out on large bumps.
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Old 07-25-2016, 04:36 PM   #9
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Section Height

I'm a big believer in section height. That is the distance from the ground to the rim. That rubber and air gives you a cushion as you drive down the road. I've never seen a reason for larger rims, but love more clearance and cushion.
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Old 07-25-2016, 04:37 PM   #10
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Also, I find 16" tires to be a little cheaper.
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