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Old 12-03-2019, 02:37 PM
henkinc henkinc is offline
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Location: Virgina
Join Date: Feb 2018
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Mein Auto: 335xi and Porsche S Cab
tire pressures for NON RF on 335X1/340Xi

My Michelin AS3+ all seasons are great. 225/45 18s. Handling is quite nice with adaptive suspension in sport mode on 2014 335Xi. But I thought the recommended (cold) 32 F/38 R was way too disparate even with the OEM Run Flats and certainly now.

I am happy with 33-34 F/37-38 R which helps with turn in and there is absolutely no concern with the tail breaking loose. Strange BMW is so cautious by recommending such a disparity favoring such higher Rear tire pressure.

What do you guys run?

2014 335Xi MT, adaptive suspension, Dinan stage 1, ER CP
2010 Porsche 997 series 2 S cabriolet, MT
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Old 12-03-2019, 02:42 PM
luigi524td luigi524td is online now
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Mein Auto: '17 540xDrive; '98 Z3 2.8
I've always run @ BMW recommended inflation pressures +3psi ... Your specific BMW & installed original equipment tire sizes should be your guide. Slight over-inflation is OK ... the inflation difference F to R determined by BMW engineering is OK with me. That's what we pay the big bucks for!
My opinions are free - you'll get exactly what you pay for!
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Old 12-03-2019, 08:10 PM
TXBonedaddy TXBonedaddy is offline
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Mein Auto: bd avalanche
+1 on the +3. Runflats on my staggered setup (225/40/19 + 255/35/19) were good at recommended 35/38. Same pressures felt a little squishy on my new non rf. 38/41 is perfect.

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