Home » Public Forums » GMCnet » follow up tire question
| follow up tire question [message #249913] |
Sat, 17 May 2014 11:01  |
chasingsummer
Messages: 434
Registered: May 2011
Location: asheboro, nc
Karma: 0
|
Senior Member |
|
|
$400 dollars later I have 2 new tires, I put in middle for time beinging since all my jacks were already in use.
I inquired to air pressure on new tires, technician said he aired up to 80, claims he would never run less than 70 psi.
I know this may be a rehash, but 80 sounds like a lot. Meanwhile I am not a tire person, so all input is appreciated.
thanks to everyone,
bgk
brian
asheboro, nc
75 eleganza, 74 build
119k miles and counting,
DOG HOUSE
|
|
|
|
|
|
|
|
| Re: follow up tire question [message #249921 is a reply to message #249913] |
Sat, 17 May 2014 13:01  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
chasingsummer wrote on Sat, 17 May 2014 10:01$400 dollars later I have 2 new tires, I put in middle for time beinging since all my jacks were already in use.
I inquired to air pressure on new tires, technician said he aired up to 80, claims he would never run less than 70 psi.
I know this may be a rehash, but 80 sounds like a lot. Meanwhile I am not a tire person, so all input is appreciated.
thanks to everyone,
bgk
80 psi is overkill for these coaches. Ideally you will have actual wheel weight data but most folks don't. For an average 26ft coach, 65 psi is a good pressure.
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
| Re: [GMCnet] follow up tire question [message #249926 is a reply to message #249921] |
Sat, 17 May 2014 13:27 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
|
Senior Member |
|
|
I am with Bob on tire pressure. I have always run my tires pressure at 65 psig. Running it at 80 will rattle your fillings going down the road. I have had all my coach weighed over the years at GMCMI conventions. Even my 30 foot stretch does not over load my tires as each tire is 2 to 3 hundred pounds under the max rating. I have run the rears at 60# in the past, but standardized on 65#.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
On May 17, 2014, at 2:01 PM, Bob de Kruyff wrote:
> chasingsummer wrote on Sat, 17 May 2014 10:01
>> $400 dollars later I have 2 new tires, I put in middle for time beinging since all my jacks were already in use.
>> I inquired to air pressure on new tires, technician said he aired up to 80, claims he would never run less than 70 psi.
>> I know this may be a rehash, but 80 sounds like a lot. Meanwhile I am not a tire person, so all input is appreciated.
>> thanks to everyone,
>> bgk
>
> 80 psi is overkill for these coaches. Ideally you will have actual wheel weight data but most folks don't. For an average 26ft coach, 65 psi is a good
> pressure.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
|
|
|
|
| Re: [GMCnet] follow up tire question [message #249950 is a reply to message #249913] |
Sat, 17 May 2014 18:18 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Brian,
In Double Trouble I run 65 in the front and 60 in both rears.
$400 for two tires sounds a bit expensive; what brand of tires did you buy?
Regards,
Rob M.
-----Original Message-----
From: brian
$400 dollars later I have 2 new tires, I put in middle for time beinging since all my jacks were already in use.
I inquired to air pressure on new tires, technician said he aired up to 80, claims he would never run less than 70 psi.
I know this may be a rehash, but 80 sounds like a lot. Meanwhile I am not a tire person, so all input is appreciated.
thanks to everyone,
bgk
--
brian
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
| Re: [GMCnet] follow up tire question [message #249972 is a reply to message #249950] |
Sat, 17 May 2014 19:44 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
|
Senior Member |
|
|
Rob
Tire prices gave gone up a lot in the last two years or so. The BF Giodrich tires that a lot of us use are now over $200 each with installation and balance.
Emery Stora
> On May 17, 2014, at 5:18 PM, Robert Mueller wrote:
>
> Brian,
>
> In Double Trouble I run 65 in the front and 60 in both rears.
>
> $400 for two tires sounds a bit expensive; what brand of tires did you buy?
>
> Regards,
> Rob M.
>
>
> -----Original Message-----
> From: brian
>
> $400 dollars later I have 2 new tires, I put in middle for time beinging since all my jacks were already in use.
> I inquired to air pressure on new tires, technician said he aired up to 80, claims he would never run less than 70 psi.
> I know this may be a rehash, but 80 sounds like a lot. Meanwhile I am not a tire person, so all input is appreciated.
> thanks to everyone,
> bgk
> --
> brian
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] follow up tire question [message #249974 is a reply to message #249972] |
Sat, 17 May 2014 19:59 |
scott cowden
Messages: 170
Registered: February 2004
Karma: 0
|
Senior Member |
|
|
My Florida adventure in late April this year included replacing two 4 year old tires that had belt failures. ( they didn't seem to like the 90+ deg temps maybe)
Two firestone Transforce HT 225/75-16 LR E's= $404 installed at Tire Mart.
Wouldn't have been my first choice in a tire but were literally the only option in the whole town.
Scott
'74 x-Glacier
Newmarket ON
Sent from my iPhone
> On May 17, 2014, at 8:44 PM, "Emery Stora" wrote:
>
> Rob
> Tire prices gave gone up a lot in the last two years or so. The BF Giodrich tires that a lot of us use are now over $200 each with installation and balance.
>
> Emery Stora
>
>> On May 17, 2014, at 5:18 PM, Robert Mueller wrote:
>>
>> Brian,
>>
>> In Double Trouble I run 65 in the front and 60 in both rears.
>>
>> $400 for two tires sounds a bit expensive; what brand of tires did you buy?
>>
>> Regards,
>> Rob M.
>>
>>
>> -----Original Message-----
>> From: brian
>>
>> $400 dollars later I have 2 new tires, I put in middle for time beinging since all my jacks were already in use.
>> I inquired to air pressure on new tires, technician said he aired up to 80, claims he would never run less than 70 psi.
>> I know this may be a rehash, but 80 sounds like a lot. Meanwhile I am not a tire person, so all input is appreciated.
>> thanks to everyone,
>> bgk
>> --
>> brian
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] follow up tire question [message #249978 is a reply to message #249974] |
Sat, 17 May 2014 20:05 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
""My Florida adventure in late April this year included replacing two 4 year old tires that had belt failures. ( they didn't seem to like the 90+ deg temps maybe)
Two firestone Transforce HT 225/75-16 LR E's= $404 installed at Tire Mart.
Wouldn't have been my first choice in a tire but were literally the only option in the whole town.
Scott
'74 x-Glacier
Newmarket ON""
The problem with all of this is that people have failures with 1 year as well. We can't let that taint the issue of what a reasonable life for a tire may be.
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
| Re: [GMCnet] follow up tire question [message #249982 is a reply to message #249974] |
Sat, 17 May 2014 20:27 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
|
Senior Member |
|
|
I had to replace one of my new recalled Michelin tire due to a side wall
blow-out. Michelin came through and replaced it without costing any money
but the paper work showed a price of $225 for the tire.
On Sat, May 17, 2014 at 6:59 PM, scott cowden wrote:
> My Florida adventure in late April this year included replacing two 4 year
> old tires that had belt failures. ( they didn't seem to like the 90+ deg
> temps maybe)
>
> Two firestone Transforce HT 225/75-16 LR E's= $404 installed at Tire Mart.
>
> Wouldn't have been my first choice in a tire but were literally the only
> option in the whole town.
>
> Scott
> '74 x-Glacier
> Newmarket ON
>
>
> Sent from my iPhone
>
>> On May 17, 2014, at 8:44 PM, "Emery Stora" wrote:
>>
>> Rob
>> Tire prices gave gone up a lot in the last two years or so. The BF
> Giodrich tires that a lot of us use are now over $200 each with
> installation and balance.
>>
>> Emery Stora
>>
>>> On May 17, 2014, at 5:18 PM, Robert Mueller
> wrote:
>>>
>>> Brian,
>>>
>>> In Double Trouble I run 65 in the front and 60 in both rears.
>>>
>>> $400 for two tires sounds a bit expensive; what brand of tires did you
> buy?
>>>
>>> Regards,
>>> Rob M.
>>>
>>>
>>> -----Original Message-----
>>> From: brian
>>>
>>> $400 dollars later I have 2 new tires, I put in middle for time
> beinging since all my jacks were already in use.
>>> I inquired to air pressure on new tires, technician said he aired up to
> 80, claims he would never run less than 70 psi.
>>> I know this may be a rehash, but 80 sounds like a lot. Meanwhile I am
> not a tire person, so all input is appreciated.
>>> thanks to everyone,
>>> bgk
>>> --
>>> brian
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
|
|
|
|
| Re: follow up tire question [message #249984 is a reply to message #249913] |
Sat, 17 May 2014 20:58 |
cbryan
Messages: 451
Registered: May 2012
Location: Ennis, Texas
Karma: 3
|
Senior Member |
|
|
Brian,
Tire pressure is one of those third rail issues. Touch it and you are in a world of hurt. There are two dangers with recently manufactured tires. One is overinflation, giving you Gene Fisher's "reduced tire patch" or the size of the area of the tire in contact with the road, therefore less traction. Some percentage. I guess there's gross overinflation like 100 pounds per square inch (psi) which in itself would give blowouts. The other is underinflation, often less than 65 psi, often spoken about, and the limits vary, being set by the load on the tire, hence the protracted scientific discussion about tire pressures in this forum history. It's been so long since the GMC Motorhome has been manufactured and changes in tire types and rim types that you can't just go with manufacturer's recommendations. unless they coincide with your own beliefs. The ride quality is another factor. Fuel mileage is yet another factor, though it is hardly ever brought up here. In general, underinflation or history of underinflation is a big factor in blowouts, old, aged-out tires is secondary, and road hazard takes a distant third, I think.
Having endured blowouts on one-ton passenger vans, I now go with what the sticker on the door frame says so far as inflation is concerned. They now run 245/75R16 with recommended 80 cold psi rear and 45 cold psi front. 1999 Dodge Ram 15 passenger van. I am not dreaming this. I just looked at a picture of the sticker. Rears are always what blow out on these. Almost always, that is. You have to be vigilant at quick change oil places to avoid having them put 32 psi in them. The resulting ride is fantastic for a while. Then even if you "catch it" and inflate it to spec, you have already likely damaged the tire if you have gone any distance loaded. Light truck tires are more like truck tires than passenger car tires, that is to say more unforgiving of underinflation and age of the tire since manufacture, regardless of tread depth remaining. So, if you were to inflate them in between overinflated and underinflated, you would have a good margin of error. Like your tire man says, 70 cold psi so that if you run a long way without checking air pressure or a long time more likely, you won't be as likely courting disaster. A blowout is an expensive proposition unless you are personally adept at fiberglass repair. I don't see much of any ride deficits from running the rears at 80 psi on those vans. Changing a tire next to semi trailers going by a couple of feet away in a drizzling rain with a van load of youth football players rocking, having a great time unsupervised makes it easier to check air pressure next time. We made it to the football game. Got beat. YMMV, and in this case almost certainly will. I was much younger then. I had noticed curious part-circular cracks around the tire sidewalls earlier. I figured no problem, they were Michelins, plenty of tread left. Hello, the carcass was letting go. Live & learn. Whatever you decide on, check it religiously. New tires after five years since tire manufacture. Some push this a little. I don't. It may be because I'm snakebit with the number of failures I have experienced. I certainly don't wish to contradict those with more experience and knowledge than I and I see on another thread that very experienced and knowledgeable engineers will now go as long as ten years. They could be right. Probably are, since Bob DeK. runs a truck lease business. For purposes of the advice given, he has more experience than I and I bow to more experience and education than I have. This discussion isn't completely germane due to the different vehicles, but the tires are comparable. It was a 16.5 tire that blew out in the 1975 Dodge Van headed to the football game. I report this dumb move in hopes it will prevent similar experiences.
Carey from Ennis, Texas
78 Royale, 500 Cadillac, Rance Baxter EFI.
[Updated on: Sat, 17 May 2014 22:12] Report message to a moderator |
|
|
|
| Re: follow up tire question [message #250835 is a reply to message #249913] |
Wed, 28 May 2014 16:36 |
bwevers
Messages: 597
Registered: October 2010
Location: San Jose
Karma: 5
|
Senior Member |
|
|
I just replaced my 10 year old Firestones with 6 new ones.
Hopefully this will reduce my chances of a blow-out.
Transforce LT225/75R16 load range E: $908 + tax at Cali Tire in San Jose, out the door.
The tire manufacture date is 2nd week of 2014.
4 of my old tires from the rear were in visibly good condition with no cracks and little tread wear.
I always checked inflation pressure before driving.
The tire shop owner will resell my old tires. 
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
|
|
|
|
Goto Forum:
Current Time: Sat Oct 05 15:01:24 CDT 2024
Total time taken to generate the page: 0.01791 seconds
|
GMCforum
Search
Help
Register
Login
Home
