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09-18-2012, 12:36 AM | #24 |
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I've been researching tire sizes for my 19" setup. The recommended up size is 245/35 front and 275/30 rear. They are slightly smaller diameter than stock. Assuming 19" wheels are same weight as stock, you'll loose weight because 19" tired weight less than 18" tires.
I think the choice between 18 or 19 depends on what is most important to the owner. Look, performance, ride , tire selection, etc.... |
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09-18-2012, 03:32 AM | #25 | |
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09-18-2012, 06:43 AM | #27 | |
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I am debating if I should use stock size and adjust aspect ratio for my next purchase. The diameter is exactly the same for the rear and just a tag over for the front. Here are the data I compiled. Front 225/45/18 225/40/19 Difference Sidewall Height: 3.99 3.54 -0.45 Section Width: 8.86 8.86 0.00 Overall Diameter: 25.97 26.09 0.12 Circumference: 81.59 81.95 0.36 Revs per mile: 776.52 773.12 -3.4 If you speedometer reads 65. You're going approximately 65.29 Front 225/45/18 245/35/19 Difference Sidewall Height: 3.99 3.38 -0.61 Section Width: 8.86 9.65 0.79 Overall Diameter: 25.97 25.75 -0.22 Circumference: 81.59 80.9 -0.69 Revs per mile: 776.52 783.17 6.65 If you speedometer reads 65. You're going approximately 64.45 Rear 255/40/18 255/35/19 Difference Sidewall Height: 4.02 3.51 -0.51 Section Width: 10.04 10.04 0.00 Overall Diameter: 26.03 26.03 0.00 Circumference: 81.78 81.77 -0.01 Revs per mile: 774.76 774.88 0.12 If you speedometer reads 65. You're going approximately 64.99 Rear 255/40/18 255/35/19 Difference Sidewall Height: 4.02 3.51 -0.51 Section Width: 10.04 10.04 0.00 Overall Diameter: 26.03 26.03 0.00 Circumference: 81.78 81.77 -0.01 Revs per mile: 774.76 774.88 0.12 If you speedometer reads 65. You're going approximately 64.99 Rear 255/40/18 275/30/19 Difference Sidewall Height: 4.02 3.25 -0.77 Section Width: 10.04 10.83 0.79 Overall Diameter: 26.03 26.03 -0.53 Circumference: 81.78 81.77 -1.68 Revs per mile: 774.76 774.88 16.27 If you speedometer reads 65. You're going approximately 63.66 |
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09-18-2012, 09:35 AM | #28 |
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09-18-2012, 01:34 PM | #30 |
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WHS ^
Track variety tires are built for sticky and low mile wear-(read lighter material use). Street tires get exponentially heavier the higher their wear rating I've found. Forget about runflats.....they are almost a chunk of steel and rubber with their sidewalls |
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09-18-2012, 05:14 PM | #31 |
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nah, all these puns suck. Thats why I didn't bother
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09-18-2012, 05:26 PM | #32 |
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09-19-2012, 02:18 PM | #33 | |
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Let the search begin and cheers to all who replied |
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09-19-2012, 02:53 PM | #34 | |
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i didn't want to lower it at all(driveways are already an issue at stock height), so i opted to fill that wheel gap as much as possible...with 19's. you're overthinking it. no one ever gets 19's and says "they're too big", but you may get 18's and think "i could've gone bigger".
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09-19-2012, 03:23 PM | #35 |
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midn12ght, your car looks great with those wheels... I think the main take away from this thread is that, if you choose your wheels and tires carefully, you can have your cake and eat it too! That is, you can step up to 19' rims and realize the improvement in appearance with no increase in weight or tire diameter and therefore no deterioration in performance as is often incorrectly attributed to larger size rims.
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09-19-2012, 03:37 PM | #36 | |
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09-19-2012, 04:01 PM | #37 |
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i also like to add in brakes, to this equation... mine were lighter on every corner, both rotor and caliper.... add in lighter nuts/stud.... unsprung wise i lost a decent amount going to the 19" csl over the stock units.....
however i also now have a set of 18s which is use for the track.... again i notice no difference if im honest.
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09-19-2012, 04:27 PM | #38 |
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Here's a quick pic with 19s just to help OP splurge
note: my usual # is 3, as that's my birth month, as well as my lucky #. However, during this track event, the hosts were offering free time trials, which meant free additional track/seat time. So I said to myself "HELL YEAH!" and got whatever number they assigned to me; which happened to be #166. note2: also, I ran over something on the way down to SoCal for that track day, and therefore my front bumper underpanel was knocked somewhat loose at the time. It has since been patched up. note3: at the time that this particular pic was taken, I was just coming out of a left-hander and starting the main straight @ Buttonwillow. note4: the red thing up front is the transponder that we used for time trials and lap timing. I attached it to my tow hook since I knew I wasn't going to spin out and therefore wouldn't need a tow note5: an E46 M3 totally bit it that day and wrecked his car decently well. He didn't have a tow hook (silly him, should've come to me for one lol!), so they towed his car and dragged it over cement with flat/blown/non-existing tires which ultimately ruined his nice track wheels...youch. Last edited by mfanatic325; 09-19-2012 at 04:37 PM.. |
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09-19-2012, 05:07 PM | #39 |
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There's no 'cake and eat it too' scenario. There will always be a compromise.
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09-19-2012, 05:49 PM | #40 |
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09-21-2012, 07:57 AM | #41 |
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Now you're really splitting hairs... My point is that with proper specification the tradeoff can be minimized to the point where the difference in performance is completely unnoticeable to the driver and virtually unmeasurable. Of course, a lot depends on the application (street, track mixed). In any case, the key is careful specification of the 19" wheel/tire combination. There are some who argue that properly spec'd 19" wheel/tire combinations outperform the 18" alternative because other positive characteristics more than offset the relatively insignificant negatives. Of course, the devil is in the details... it all depends on specifically which wheel/tire combinations are being compared. Point is, broad generalizations about the pros and cons of 18' vs 19" wheels/tires are meaningless and if a person prefers the look of 19" rims, they should not feel they have to pay some huge price in performance to make the change.
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