Advice for rear winter tire pressure

ChipB · 12-21-2011, 08:29 AM

I put my winter tires on about two weeks ago - Blizzak LM60 run flats - and inflated them per the instructions on the door sticker to 42 PSI (rear). This is the 2nd season on these tires, and they only have about 2000 miles on them. Transitioning from summer to winter tires always takes some adjustment, but I'm really concerned at how slippery these tires are, especially in the wet - I feel like I'm riding on tires with the consistency of hocky pucks. Just this morning it's about 40 degrees, roads are damp, and twice I spun the rear tires merely starting up from a stop light. I didn't floor it - just wanted to move off in a reasonably brisk way. I'm thinking that even though BMW says to go to 42 PSI perhaps I should back off a bit - to perhaps 36 PSI or so. Any thoughts or experience with this issue? BTW - I know that run-flats are always a bit "harsh," but I have no complaints about the ride or handling of the stock summer run-flats.

gunnerxq · 12-21-2011, 12:11 PM

The same happened to me yesterday. I think its because its not cold enough outside so our tires are too soft. Once it 32 or below I seem to have more grip.

ZZZZ · 12-21-2011, 12:13 PM

I run mine at 36PSI in the winter all the way around for this very reason.

12-21-2011, 08:29 AM	#1
ChipB First Lieutenant 54 Rep 373 Posts Drives: 2015 M4 'vert, 2014 X5 Join Date: Nov 2010 Location: Naperville, IL iTrader: (0)	Advice for rear winter tire pressure I put my winter tires on about two weeks ago - Blizzak LM60 run flats - and inflated them per the instructions on the door sticker to 42 PSI (rear). This is the 2nd season on these tires, and they only have about 2000 miles on them. Transitioning from summer to winter tires always takes some adjustment, but I'm really concerned at how slippery these tires are, especially in the wet - I feel like I'm riding on tires with the consistency of hocky pucks. Just this morning it's about 40 degrees, roads are damp, and twice I spun the rear tires merely starting up from a stop light. I didn't floor it - just wanted to move off in a reasonably brisk way. I'm thinking that even though BMW says to go to 42 PSI perhaps I should back off a bit - to perhaps 36 PSI or so. Any thoughts or experience with this issue? BTW - I know that run-flats are always a bit "harsh," but I have no complaints about the ride or handling of the stock summer run-flats. __________________ F83 M4 convertible, F15 X5 xDrive35i Previous: E93 335i, E36 328iC, E28 528e, E21 320i Last edited by ChipB; 12-21-2011 at 08:35 AM..
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12-21-2011, 12:11 PM	#2
gunnerxq Lieutenant Colonel 213 Rep 1,780 Posts Drives: e90 "325i" Join Date: Sep 2010 Location: New York iTrader: (1)	The same happened to me yesterday. I think its because its not cold enough outside so our tires are too soft. Once it 32 or below I seem to have more grip. __________________ Koni special active red, eibach pro-kit springs, Remus exhaust, stage 3 intake manifold,Stage 2 AA tune, BMW Short shift kit. Silicon intake pipe. M3 control arms front, M3 rear. ECS trailing arm with whiteline bushings. Purple powerflex subframe bushings. Yellow power flex upper shock mounts. Single mass flywheel OE weight.
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12-21-2011, 12:13 PM	#3
ZZZZ Captain 50 Rep 753 Posts Drives: Z4 3.0i winterbeater Join Date: Nov 2010 Location: Toronto, Ontario iTrader: (1)	I run mine at 36PSI in the winter all the way around for this very reason.
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