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Run-flat, self-sealing, PAX tires for Minivans

1466 messages,  Last post on Mar 09, 2010 at 7:25 AM

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What is this discussion about? Toyota Sienna, Honda Odyssey, Ford Freestar, Mercury Monterey, Tires, Wheels, Van


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#1291 of 1466
NY Times PAX Announcement by actualsize
Jun 25, 2008 (8:31 am)
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Replying to: shipo (Jun 25, 2008 8:09 am)

I didn't see anyone post this story about Michelin throwing-in the towel on PAX.
 
Talk about lame duck ...
 
NY Times, April 20, 2008
 
#1292 of 1466
Re: NY Times PAX Announcement [actualsize] by shipo
Jun 25, 2008 (11:51 am)
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Replying to: actualsize (Jun 25, 2008 8:31 am)

I loved the last line of the article that stated:
 
Honda recommends that owners who have the PAX system not change to conventional wheels. Chris Martin, a Honda spokesman, said the Touring model’s suspension was tuned for the PAX tires and switching to conventional wheels “would compromise the ride and handling.”
 
I find that especially funny as the owners that I've talked to that have made the switch have universally stated that the "ride and handling" improved once the heavy PAX wheel and tire assembly was replaced by a conventional setup weighing less than two-thirds of the weight.
 
Hmmm, maybe by "compromise" they mean any deviation from OEM, good or bad.
 
Best Regards,
Shipo
#1293 of 1466
Re: NY Times PAX Announcement [shipo] by actualsize
Jun 25, 2008 (1:10 pm)
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Replying to: shipo (Jun 25, 2008 11:51 am)

PAX Odys DO have a unique front stab bar (larger) and different front damper settings (well, the part number is different) but nothing is different in the back. It can't amount to much, and the bigger front stab bar, if anything, would increase understeer a bit--safer for the average driver.
 
In reality, any time you change a tire away from the OE, PAX or not, run-flat or not--even if you retain the same size--you are messing up the balance a little because the tires are tuned along with the springs and shocks to work together as a system.
 
But people make tire changes all the time--they almost never buy exact OE replacements, and many times they change wheels, too--without heed, and the world has not come to an end. They buy aftermarket shocks, off-brand replacement brake pads, a different exhaust. So what?
 
This statement form Honda, therefore, while technically containing a granule of truth, is just a bit disingenuous. "Change" is more accurate than "compromise" and while I can see how the corporation might be unwilling to publicly endorse such a move, the difference can't amount to very much. Actually, I'd love to do a test myself.
#1294 of 1466
Re: NY Times PAX Announcement [actualsize] by shipo
Jun 25, 2008 (5:04 pm)
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Replying to: actualsize (Jun 25, 2008 1:10 pm)

I'm fairly active on a number of BMW boards, and there are any number of owners who've swapped out their RFTs for GFTs (of the same size of course), and then reported before and after track times. In every case that I've read so far, a measurable reduction in lap times was the result. That and the cars became much more compliant for day-to-day driving in spite of the "Run-Flat tuned suspension".
 
I've yet to talk to an Odyssey owner who tracked his or her van prior to a wheel and tire swap (not terribly surprising), so I cannot report on measured improvements. That said, they've all reported a much better ride and much more precise handling. Go figure.
 
Best Regards,
Shipo
#1295 of 1466
Re: NY Times PAX Announcement [shipo] by actualsize
Jun 27, 2008 (9:56 am)
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Replying to: shipo (Jun 25, 2008 5:04 pm)

I'm not surprised. RFTs fitted to BMWs are the standard, stiff-sidewall variety. They have little compliance, they're slightly heavier, they're skittish (especially if the road has imperfections, i.e. a real road,) and all the suspension tuning in the world won't overcome the basic liability incurred by fitting cement-like tires. Damage control is all that run-flat tuned suspension is.
 
Same is true of an Odyssey, but in a slightly different vein. Sure the PAX ring made it possible to retain softish-sidewalls, but the humungous unsprung mass of a PAX at each corner required more damping in the struts to keep them on the ground and forced the use of tie-rod ends with bulbous mass dampers on them. Damage control again, but for high unsprung mass instead of stiff tires.
 
Run-flat tires of any kind impose engineering compromises that no ride engineer wants to make.
#1296 of 1466
Depax kit by rv65
Jun 27, 2008 (5:32 pm)
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Collegehillshonda is working on a depax kit. Can be modular so you add what you want. The bad thing is that 05-06 models have a different type of lugnut while the 07-08 models have the traditional kind. The 07 and up lugnuts do retrofit a 2005-2006 model but it will take about 20 of them. Thats if you want an MDX wheel or an 08 non pax touring wheel.
#1297 of 1466
Honda PAX/Michelin Class Action Lawsuit by gary_mag
Jul 07, 2008 (4:40 pm)
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Replying to: smlycat (Apr 04, 2008 7:00 am)

Can someone please send me the contact information to join this class action lawsuit?
 
I am a Honda Odyssey 2005 owner and now needing to purchase a second set of PAX tires, with no options to purchase any other aftermarket tires -- this is ridiculous.
 
Thanks,
 
Gary
#1298 of 1466
Re: Honda PAX/Michelin Class Action Lawsuit [gary_mag] by shipo
Jul 07, 2008 (6:10 pm)
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Replying to: gary_mag (Jul 07, 2008 4:40 pm)

Rumor has it that College Hills Honda has developed (or is developing) a PAX swap-out kit, complete with wheels, TPMS sensors and tires. You might want to give them a call.
 
http://www.collegehillshonda.com/
 
Best Regards,
Shipo
#1299 of 1466
Re: NY Times PAX Announcement [shipo] by dmayes
Jul 12, 2008 (8:07 am)
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Replying to: shipo (Jun 25, 2008 5:04 pm)

I just swapped out my PAX system tires on my 2005 Honda Odyssey Touring for conventional tires and rims. I replaced them with 16" rims and Goodyear Assurance Comfortred tires, size 235/65R16". Ordered from TireRack.com, cost me $804.00 plus shipping, had them installed a couple of days ago for $115 at NTB. The TPMS system was transferred to the new rims and is working properly. I love the ride. The van drives much smoother. I did notice a slight difference in the feel of the steering. It's a smoother, maybe lighter feel, not to sure yet. Handling I think is better. I'll keep you posted, since its only been a couple of days. I am so happy I made the switch, I am no longer in bondage with Honda tires.
#1300 of 1466
Re: NY Times PAX Announcement [dmayes] by shipo
Jul 12, 2008 (9:07 am)
Reply

Replying to: dmayes (Jul 12, 2008 8:07 am)

Congratulations on the successful "upgrade". That said, I guess you didn't get the memo, Honda says that by doing what you did, you're van is going to suffer in both the ride and the handling deparment. Personally I don't believe a word of that.
 
Best Regards,
Shipo

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