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Runflats improve performance?
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02-15-2013, 04:47 AM | #23 |
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Yes at city speeds I was shocked at the smoothness of the run flats.
I was sure I would hate them. They are great for the design at those speeds. However, as many have stated, when I get above 80mph on a curve the hopping of the back wheels especially is a pain. The car holds, and I dig with acceleration to see if they will break lose. So far up to 100mph they hold. I can only imagine the dw's have less hop with the more smoothness and equal or better performance. Get what you like. The only risk is a flat. imho.
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02-15-2013, 09:03 AM | #24 |
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Runflats are not better than non-runflats... at all. It may FEEL faster because of the stiff (sporty) ride.. but it's not even in the same league as a good non-rft. I've tracked them both.
Characteristics: RFT: bumpy on corner entry, slides way too easily, jumps over slight road imbalances, OMG TRAMLINING - don't hit a pothole.. or else.. EXPENSIVE as all hell Non-RFT: softer, sidewall flex means more tread on the ground to grip, WAY MORE grip, feels slower but is way faster, will save your rims when you hit a pothole, way more predictable mid-corner and exit, easier to correct oversteer. Bottom line is that the RFT's feel like the car is on stone wheels.
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02-15-2013, 10:05 AM | #25 |
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Because of the stiffer sidewall, RFT won't roll under the car and has more rubber to the ground. This maximizes the traction. However, in the wet, soft tire is quicker:
Sport Auto: Handling dry (2770 m track): B-stone RFT: 1,17,0 min B-stone Std: 1.19,4 min PS2 RFT: 1.17,4 PS2 Std: 1.17,8 min Handling wet (2300 m track) B-stone RFT: 1.49,3 min B-stone Std: 1.44,7 min PS2 RFT: 1.44,2 PS2 Std: 1.42,5 min |
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02-15-2013, 11:41 AM | #26 | |
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Negative! Tire is a component of the entire suspension system. The example above shows only the results on this one particular vehicle. A different vehicle with different suspension system could have completely different results for these tires. |
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02-16-2013, 12:06 AM | #27 |
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Just ditched my RFTs(B-Stone) for all-season ZE912 Falkens and the ride feels better, went flatout today and the car felt faster since each tire only weighs 25lbs compared to the 30ish pounds the RFTs weigh.
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02-19-2013, 05:48 PM | #30 | |
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Now, for this summer, I've just ordered some 19" Morr VS8.2 wheels and Michelin Pilot Super Sport tires (non-RF). I spend a lot of time with racers and all of them have changed out to non-RF. I'm expecting some performance gains based on the grip of the tire and the overall weight savings. I might get more comfort on the non-RF, but I am going from a 17" to 19" wheel, so I've got much shorter sidewalls coming. However, I'm saving over 7lbs per wheel!!!! 4lbs on the rim and 3lbs on the tire! That my friends, coupled with the grip from the Pilot SS, should provide a very nice improvement. This was not a cheap investment at over $7k for the new rims and both sets of tires (sold my OEM all seasons for $300), but your wheels/tires are the MOST important item on your vehicle when it comes to the combination of performance and safety, so don't cheap out! |
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02-19-2013, 06:49 PM | #31 | ||
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Quote:
I think will go to Apex ARC-8 18" but only as wide as will fit without changes. Will probably do the same tires as you. But may get a donut spare for long trips.
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