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996T: Run 295x35x18 on the back with 235x40x18 front?

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YOUR RESEARCH996T: Run 295x35x18 on the back with 235x40x18 front?

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Use slightly higher 35 profile

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I understand the standard size for the back on the 996T is 295x30x18, so can I use the slightly higher 35 profile on the back of a 996T or are there rubbing/rolling circumference issues with them?:dont know:
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996T: Run 295x35x18 on the back with 235x40x18 front?

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Leading evidence: 'Use slightly higher 35 profile' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use slightly higher 35 profile' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Use slightly higher 35 profile

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed · Original poster
I understand the standard size for the back on the 996T is 295x30x18, so can I use the slightly higher 35 profile on the back of a 996T or are there rubbing/rolling circumference issues with them?:dont know:
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996T: Run 295x35x18 on the back with 235x40x18 front?

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POST 1 / ORIGINAL POSTEROriginal post

Hi all, picked up a set of very nice 997 OEM C2 wheels in 8.5J and 10.5J x 18 which have nearly new Pilot Sport 4s on the back in 295x35x18 on the back pair. I understand the standard size for the back on the 996T is 295x30x18, so can I use the slightly higher 35 profile on the back of a 996T or are there rubbing/rolling circumference issues with them?:dont know: Front will be 235x40x18. Thanks! :thumb:

POST 2Original post

Here's the result of a tyre-size calculator: FITMENT NOT RECOMMENDED! The percentage change is 4.65% and the circumference change is 29.5mm.

POST 3Original post

The most import thing is whether the circumference is the same front and rear or not. MC

POST 4 / ORIGINAL POSTEROriginal post

Ok thanks, looks like I need to sell the tyres on. :thumb:

POST 5 / ORIGINAL POSTEROriginal post

Now for sale. http://911uk.com/viewtopic.php?p=1550793#1550793

POST 6 / ORIGINAL POSTEROriginal post

Thanks. :thumb: Anyone know what the threshold is for the change in circumference for the back vs the front? I just realised the front tyres are also slightly the wrong profile for 996 - the standard is 225 40 18, the ones on the wheels are 235 40 18. So, the fronts have a 1.2% greater rolling circumference and the rears have a 4.7% greater rolling circumference, giving a net comparative increase in the rear rolling circumference of 3.5%. Is that within tolerance? :dont know: All calculations done here: https://www.tyresizecalculator.com/tyre-wheel-calculators/tire-size-calculator-tire-dimensions

POST 7Original post

My understanding is that it's not recommended to exceed a 2% difference front to rear.... MF

POST 8Original post

:agree: With the rears being larger than the front. MC

POST 9 / ORIGINAL POSTEROriginal post

Thanks for the advice, guys. :thumb:

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