Author Topic: Bigger tyres  (Read 1723 times)

November 08, 2016, 08:48:35 AM
Read 1723 times

Philipl

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Hi all
Am driving a 2013 Forester 2.5 CVT. want to change my tyre size and go to 225-65-17
Bridgestone Deuler D 697. Has anyone done this and how is it working? How much does it effect the power and fuel consumption ?

Philip

November 08, 2016, 09:47:50 AM
Reply #1

Stev0

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It should work, but will negatively influence power and your car should be about 1/100km heavier on fuel.
Jeep Commander CRD - GDE Hot Tune
ex Prodrive Xt, X, XT, WRX STI, Outback 3.0R

November 08, 2016, 11:09:18 AM
Reply #2

JoeDijeaux

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It should work, but will negatively influence power and your car should be about 1/100km heavier on fuel.

Would it really affect your fuel consumption? I mean, you're actually going further per revolution of the tyre, so your odometer is showing you've done less miles than you actually did.

Mind you, a bigger tyre would make the speedo more accurate. Mine is out by about 8%.

November 08, 2016, 11:16:04 AM
Reply #3

jbh

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The problem is that the NA engine do not have enough reserve power. If you "lengthen" your ratio by fitting bigger tyres the engine labour more and thus is not as efficient as it should be. Especially if loaded as yours seem to be.  ;D. Vehicle will also struggle when driving up Sani Pass although the CVT is fantastic and should hide symptoms of struggling.
On a turbo model you can get away with bigger tyres if they fit into the wheel arch and boot cavity. If they do not physically fit, you can be sure that you are out of limits.
jbh
Southernmost point of Africa
Ex:2003 Forester XSel Dual Range
Now: 2009 XS Dual Range. LSS sump guard.
Pedders Suspension. Aluminium heavy duty Radiator.

November 08, 2016, 11:40:57 AM
Reply #4

Stev0

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initial rolling resistance is where its at.

AT tire on my Jeep 12l/100km
MT Tires = 18l/100km
Jeep Commander CRD - GDE Hot Tune
ex Prodrive Xt, X, XT, WRX STI, Outback 3.0R

November 15, 2016, 07:01:34 PM
Reply #5

Wynandd

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I've fitted the bigger tyres, also the Bridgestones on my SH, XT. There's no difference in fuel consumption, my speedo is 100% correct, according to the GPS and I've got awesome ground clearance, A/T ability and I'm rid of those ridiculous paper thin Geolandar sidewalls! One bug bear is the squealing around every tight corner at walking speed! Don't know why there should be any difference in fuel consumption, as mine runs lower RPM at the same speed...
Ex - 2007 Subaru Forester XS
Ex - 2008 Subaru Forester XT
Current - 2010 Subaru Forester XT

November 16, 2016, 10:19:36 AM
Reply #6

JoeDijeaux

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I've fitted the bigger tyres, also the Bridgestones on my SH, XT. There's no difference in fuel consumption, my speedo is 100% correct, according to the GPS and I've got awesome ground clearance, A/T ability and I'm rid of those ridiculous paper thin Geolandar sidewalls! One bug bear is the squealing around every tight corner at walking speed! Don't know why there should be any difference in fuel consumption, as mine runs lower RPM at the same speed...

One imagines there would be a bit more load during acceleration, but it should be more than compensated for when you're coasting. Well, that's the theory anyway.

January 06, 2017, 02:58:59 PM
Reply #7

Philipl

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Managed to find new Bridgestone's, done + - 5000km and am very happy, no difference in fuel consumption (have not yet been up to Gauteng, going in April/ May) almost zero tyre noise (much quieter then the original Yokohama) good ground clearance and grip, I'm a very happy chappie.

January 09, 2017, 11:57:35 AM
Reply #8

jbh

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Did you buy the Bridgestone Deuler D 697's as indicated in your first posting?
jbh
Southernmost point of Africa
Ex:2003 Forester XSel Dual Range
Now: 2009 XS Dual Range. LSS sump guard.
Pedders Suspension. Aluminium heavy duty Radiator.

February 07, 2017, 09:10:49 AM
Reply #9

PaulR

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Hi...Sorry for hijacking this thread, but I'm looking for 15" steel rims for my SG. There is a mud terrain tyre available for the forester... ;) ;) ;)
Ex 2007 SG9 XS AT

February 07, 2017, 11:29:17 AM
Reply #10

Bravofox

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Hi...Sorry for hijacking this thread, but I'm looking for 15" steel rims for my SG. There is a mud terrain tyre available for the forester... ;) ;) ;)

As a rule, 15" does not fit on the Forester due to the brake calipers not clearing them.
There may be some mods that can be done or fitting special 15" rally rims, but is it is not a straight forward process...
2015 Outback 3.6R-S
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-ex -2009 SH XT A/T
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February 08, 2017, 03:32:38 PM
Reply #11

Philipl

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Did you buy the Bridgestone Deuler D 697's as indicated in your first posting?
Yes I did and have done some gravel driving and they handled very well, especially the corrugations.


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September 23, 2017, 06:00:31 PM
Reply #12

Frosty

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Man, this sounds great as I
« Last Edit: September 23, 2017, 06:02:13 PM by Frosty »
2014 Subaru Forester 2.0X - Ice Silver

September 24, 2017, 06:24:47 AM
Reply #13

Andrepret

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I am a new owner off a 2009 fozzy 2.5x. I realized today that it is fitted with a bigger tire. 215/70/16. Bf goodrich a/t. How much difference will this make to the speedo. Standard size is 215/65/16.

September 25, 2017, 08:42:21 PM
Reply #14

LoopSoosStroop

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Should be spot on now.

I'll take those BF's if you dont want them...  ;D
2007 XT AT
Midrand - Gauteng