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Discussion Starter · #1 ·
I loose about between 5 to 7 PSI with the Factory installed Hankook Optimo Tires a month on all 4 Tires. Honestly I never had any Brand that looses that much air. First I thought there is a problem with the sensors and had it checked out by the Dealer but they all work fine. Discount Tires keep filling them up and checked out the tires at my last fill up and can not find anything wrong with the tires. Tires look fine and feel perfect on the Road no problems with the rims either. I am have no clue what is up with the air loss. I hate to take them off since they only got around 8500 Miles on it. Any thoughts?
 

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Not sure what brand tires I have but they are oem run flats and I have to put air on a monthly basis as well. This car(tires) or what ever it is, seems to lose air. Could be the tps sensors?
 

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Discussion Starter · #3 ·
Sensors checked out ok. I was thinking maybe the Valve Caps but they did not have been on too tight either. Next step I will try to wet the rims and see if I loose air between the tire and rims. I mean it is really not a big problem to stop by once a week and put some air into the tires. It is more like scratching my head why it happens.:(
 

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Wow. I have 16 inch runflats coming on mine when they deliver it. Mental note to keep an eye on air pressure. Thanks for the heads-up!
 

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On a new-ish car it is unlikely that corrosion of the wheels at the bead seats is causing air loss - but on the other hand it seems to happen to all older alloy wheels and, as you've eliminated most other things, it might be worth checking.

The reliable check is to find a good tire shop (I've no idea if Discount Tires qualifies as that) and get them to remount the tires using a bead sealant. My experience is that this is a perfect cure for at least 12 months, though it reduces in effectiveness after that. I imagine alloy wheel corrosion may not be a common issue in Arizona, which is why you may need to find a good tire place who know about bead sealing.

But in your case I would be using it to check if that is where the air loss is occurring (I don't believe a visual spray/leak test will detect such a relatively slow air loss). If it stopped the air loss, then I would be going to Mini to get them to pay for refinishing the wheels, since I'm guessing yours are still under warranty.
 

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I have 4 Hankook runflats I would be glad to sell you for a good price. At 6K miles I replaced mine with Goodyears all season performance tires. Also have a spare set of Contis, but think I'll hold on to them for a spare set. In 6K miles, never added air once to the Hankooks.
 

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When this happens to all four wheels there must be something wrong with the way they are mounted to the rim but I can't imagine the factory making this mistake 4 times or even more when they made this mistake with a whole batch or used defective valves. Or are they dealer fitted after delivery of the car at the dealership without you knowing it? I know some dealers keep the premium brands that are factory installed with brands or types of lesser quality. Mine is fitted with Michelin Primacy 3 but I can imagine there's a good profit for them when they would've decided to keep them for themselves and deliver the car with cheaper ones...I would never know.

the Hankook Optimo is not really a performance tyre and is adviced for a moderate style of driving. On many sites defined as a "budget tyre" and in my opinion not really suitable for a MCS or JCW.

I check mine almost weekly for loss of pressure but never had to put some new air in them so far. 3 months old, 6000 km.
 

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Just found out that Hankook thinks otherwise on their website and describes it as a High-performance tire with superb wet/dry handling performance.

Amazing how all tire manufacturers claim they produce the best tires. Marketing is a poweful tool :D

But without making any jokes or being disrespectful towards another man's property I'd ask the dealer to sort it out because loosing too much air is not normal to begin with but is also potentially dangerous, not fuel effective and not very helpful for the lifecycle of the tires.
 

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Discussion Starter · #9 ·
Next time I am at the Dealer I will ask them and let them check it out again. I had some $ 89.00 Toyo Tires on the Abarth a true Budget Tire and a lot softer than the Hankook and they never lost any air. Of Course I had to replace them at 15K but still a great tire for the $$$.
 

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My right side front loses air, and has done from new. The dealer tells me it's a slow puncture, I think it's the valve/stem. I want to replace the wheels with some 18" Team Dynamics Imola Black Alloy Wheels. So once I do that, I can check the current wheels to see what the score is...
 

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Or are they dealer fitted after delivery of the car at the dealership without you knowing it? I know some dealers keep the premium brands that are factory installed with brands or types of lesser quality. Mine is fitted with Michelin Primacy 3 but I can imagine there's a good profit for them when they would've decided to keep them for themselves and deliver the car with cheaper ones...I would never know.

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I'm beginning to wonder about this myself. My '15 had Hankook run flats when it was delivered to me. Thought it a little odd for a european car. Then I looked at the '07 MCS that I traded in. When I made the trade it had an almost new set of Goodyear F1 all seasons on it. Now it's sporting a new set of Hankooks. :eek:
 

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I checked my tires yesterday, and my Pirelli P7 Summer Run Flats were down in the rear about 4 pounds each! The fronts were only down about a pound or so. At least they were consistent both front/rear with respect to air loss.


The weather has gotten much colder recently, but my JCW stays in a relatively warm (not heated) garage. Wondering if this is normal with run flats?


I've not had loss like that on my other cars that sit waaaay much more than the MINI.


John
 
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Reaching almost 9000 kilometers and still a steady 2,6 bar in all 4 tires.

Question to you all: do you rely on the pressure sensors of the car or did you alos double check with an external pressure gauge? Sometimes I start doubtimg the accuracy of all these electronic systems.
 

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Discussion Starter · #15 ·
The last time the Sensor told me my tires have been low and I had them checked at the tire place them sensors have been pretty accurate within 1 pound of what the display said.
 

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Discussion Starter · #16 ·
02, I had the same problem with the P7 on my Abarth they lost about 2 pounds a month front/rear. I am not a fan of the P7 they are a crappy over priced tire.IMHO I had to replace the P7 on the Barth with 10K and I never tracked the car just city and AZ back road driving.:) The Calendar on the other hand is fantastic. :D
 

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I never bother with the in car pressure display. What's the point. You have to be driving to get a reading as as soon as you're driving the pressure I s going up due to the heat of friction. The manual says check temps cold so I use a gauge. In the car the tyres are usually two to three kpa up by the time it's reading though depends which has been in the sun too!
 

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True, when using the sensors the pressure will increase a little during driving when the tires warm up but at when the pressure off all 4 tires goes up by the same values you at least know that the're ok. Is the reading accurate? Only a double check will tell.

On a previous car I had one tire constantly loosing pressure. It was checked several times by the tire specialist with soap and in a waterbatch (with me present) but tire and rim did not show any leaks. The valve was replaced but without result. Even the tire was removed and fitted again but without result. The only solution was to replace the tire with a new one and the problem was gone. We never knew what the problem was.
 

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Discussion Starter · #19 ·
Don,t you miss the old days when we did not have all those gadgets like tire sensors I phones electronic steering etc etc.... we had less too worry about while driving. :D
 

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Amen brother! And life generally was so much simpler! :blush:
 
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