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BMW 3-Series (E90 E92) Forum
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Should I buy these
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01-09-2015, 08:47 PM | #1 |
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Should I buy these
I've had my eye on these for a while but wanted a second opinion before pulling the trigger
Tyres look stretched but might just be the pics What do you think... bargain or dud?? ![]() http://www.ebay.com.au/itm/271731454...84.m1423.l2648 |
01-09-2015, 09:07 PM | #3 |
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01-09-2015, 09:54 PM | #4 |
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Haha I had been looking at them as well, and the main reason I haven't is Id have to buy a new set of rear tyres straight away.
You will definitely have less performance and it will be less safe than stock sizes (will affect speed reading also) but it would be ok, just depends if you could live with it ? Edit : You could keep the 245's and use them in the future as fronts (though they may go off by then ...) |
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01-09-2015, 09:58 PM | #5 | |
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Im on 19s so would the speedo still need adjusting? |
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01-09-2015, 10:02 PM | #6 |
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The tyres would be stretched but the front and rear wheel sizes are within the allowable range for the respective tyre widths.
It depends if stretched is your thing. I'm pretty sure that, technically, you're not allowed to run a narrower tyre than the narrowest that is specified on the tyre plaque/label. You might need to research this further. I don't know why anyone would run narrower anyway. Make sure the hub centre bore is 72.56mm (usually specified as 72.5 or 72.6). Some BMW wheels have the same PCD but have larger HCB (74.1mm), which can cause wheel vibrations. Commodores have smaller HCBs but the aftermarket wheels that are designed for them generally have larger HCBs. |
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01-09-2015, 10:18 PM | #7 | |
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![]() Its a minimal difference, but different. At 100kmh you will really be doing ~103kmh, but they are narrower and taller, better for straight line (longer per gear) but worse for performance. |
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01-09-2015, 10:21 PM | #8 |
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It won't throw the speedo off by much at all, since it's stretched the sidewall will have less height. Correct size would be 255/265/ 30/19.
In general, a slightly stretched tyre will give you more response when cornering due to less sidewall flex. A correct fitting size tyre will give you more grip, less feel. |
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01-09-2015, 10:26 PM | #9 |
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That would be correct if it was the correct profile, in this case it is a 35 profile on the rear so it has an 8% taller sidewall and will have more flex and worse response.
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01-09-2015, 10:39 PM | #10 |
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Keep in mind each tyre manufacturer may have 30 profile tyres, but it still varys in height.
For example, a Conti SportContact 3 sits a little taller than the Pirelli P7 in the same size |
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01-09-2015, 10:56 PM | #11 | |
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Socket I wouldn't run these on my car for the reasons I have mentioned, but the overall variance is not enough to cause an issue for daily driving. |
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01-09-2015, 11:29 PM | #13 | |
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01-10-2015, 12:46 AM | #15 |
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01-10-2015, 12:47 AM | #16 |
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The rims are 8.5 fronts and 9.5 rears
Could I use the rims but replace the rubber with 245 on the fronts and 265 on the rear? or are the rims a bit narrow? ![]() |
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01-10-2015, 12:49 AM | #17 | |
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http://www.wheelcalc.com/ |
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01-10-2015, 01:09 AM | #18 |
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Socket, just get tyres that fit properly, its not worth the few hundred bucks saving for something that is the only thing between your car and the road.
IMO, the GT-CX wheels from Jason at EuroDivision look similar to these (if this is the sort of wheel you want) with a sale price of $989 (if the end of year sale still on). Jason can also get tyres from a shop down the road from him, where he gets them at wholesale cost. I rang around to compare tyre prices and his price for the tyres i went with was below cost of some places i called. (they was 2014 stock too). |
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01-10-2015, 01:12 AM | #19 | |
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Thanks Harmsy, Great idea mate... seems the call on this one is dud ![]() |
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01-10-2015, 02:02 AM | #20 | |
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check this calculator it is far more conclusive and detailed. http://tire-size-conversion.com/tire-size-calculator/ a 255/30 has a 13% lower profile than the 245/35 , I was calculating off a 265/30 which is what I would use personally. Socket I would keep the fronts as is and replace the 245's to the correct size , but 245 on the front isn't that far off either (just that they are on the rear rims so more messing about) |
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01-10-2015, 02:04 AM | #21 |
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01-10-2015, 02:09 AM | #22 | |
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Thanks guys Sounds like not exactly the perfect set up Also the issue of rubbing if I put em on my lowered car Right now my current set up doesn't rub, but it might if I fit higher profiles on it. Now I like rubbing but not on my wheel arches ![]() |
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