Join Truck Conversion Today
Reply
 
LinkBack Thread Tools Display Modes
 
Old 03-29-2019, 05:13 PM   #1
Senior Member
 
Join Date: Jun 2012
Location: Spotsylvania
Posts: 365
Default New Steer tires: Three questions

What is the current conventional wisdom about steer tire age? Mine show very little wear, and have no sidewall dry rot that I can see, but I think they are 6yrs old. Is it time to replace them anyway?

Anyone running the Michelin X Coach HL Zs? I was just wondering how the extra weight capacity might affect ride.

Lastly, when Michelin gives a tire 3-stars instead of 5 for fuel efficiency, does that mean that they are 40% less fuel efficient?!
__________________

__________________
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450
petrel is offline   Reply With Quote
Old 03-30-2019, 05:18 AM   #2
Senior Member
 
hoodoo valley's Avatar
 
Join Date: Feb 2019
Location: priest river
Posts: 122
Default

Watching this thread.
__________________

hoodoo valley is offline   Reply With Quote
Old 03-30-2019, 11:26 PM   #3
Member
 
Join Date: Aug 2011
Location: Coaldale
Posts: 81
Default

Last summer I had to replace the Michelin XZA2 Energy 295/80R22.5 that the dealer put on my coach when I bought it 6yrs ago due to dry rot(only have about 10,000miles on them. The dealer chain my employer uses had some Continental HSR2 that they were willing to sell me for $200/tire due to stopping carrying Continental (reg $700cdn, I am in Canada), now I am NOT a fan of either the dealer chain or Continental tires in general, but I figured that since they were so cheap and I put so few miles on my coach that I would take a chance on them. Made it 2miles and took them back, front end shook so bad that the dishes in the cupboard rattled and you could visually see the front of the coach moving up and down, tried rebalancing, no go, ordered up some Michelin X Coach HL Z's (approx $800cdn each) once they were on, no more vibration, balanced out easier too. Lesson learned. Don't buy cheap steer tires and don't deal with people/businesses you don't like. Talked to the tire shop I normally deal with and told him what happened and he said "doesn't surprise me" and showed me his price on the Michelins (notably cheaper). He has access to pretty much every brand out there and unless the customer is adamant about being cheap he highly suggests Michelin and/or Toyo for motorcoaches, trucks are different. He says off-shore stuff is hit and miss, I personally had good luck in the past with Double Coin drives and trailer tires in the past but that was mostly non-pavement use.


As far as the extra weight capacity you probably need it, my Haulmark/Coronado is just over 15,000lb on the steer axle. I am sure your Renegade is up there too. If you don't need the extra capacity check with Michelin and based on your tires and axle weight they can tell you what pressure you can safely run and in theory get a softer ride.


From what I have read/been told, on the "Fuel efficient Rated" tires the top ones might save you 8-10% on fuel over regular tires (in other words if you are getting 10mpg(I am close to 8 with mine, so the number gap is even smaller) and a top rated fuel efficient tire "might" get you 11mpg and a mid rated tire might get you 5% better mpg or 10.5mpg) so unless you drive 100,000miles a year you probably won't notice the difference, long haul truckers would.
__________________
2007 Haulmark 3329DS, Freightliner Coronado Chassis, 515hp Detroit, Meritor Freedomline 12speed Autoshift, 10kw Generator, In-motion Satellite.
porky69 is offline   Reply With Quote
Old 04-01-2019, 07:10 AM   #4
Senior Member
 
Join Date: Jun 2012
Location: Spotsylvania
Posts: 365
Default

Thanks for your insights!
__________________
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450
petrel is offline   Reply With Quote
Old 04-01-2019, 12:03 PM   #5
Senior Member
 
bushpilot's Avatar
 
Join Date: Jul 2011
Location: Tomball
Posts: 1,414
Default

I had XZE2's on the front - iirc they were about 20 weeks from 5 yrs old - WHEN IT BLEW....and caused $11k in damage.....we store inside (enclosed/private garage, no climate control)....I keep a close eye on tire pressure, temp & sidewalls for fracturing....I had NO sign of any aging.

im lucky I didnt damage the wheel.
__________________
Don R.
'04 Haulmark (M42386) 42', 2 slide, 10kw - Pictures
'04 F350 CrewCab Longbed 4x4, 50g aux tank & gear vendors dbl over
bushpilot is offline   Reply With Quote
Old 04-03-2019, 08:42 AM   #6
Senior Member
 
Join Date: Jun 2012
Location: Spotsylvania
Posts: 365
Default

Ok, I'm sold! The date code on mine is 3013...yikes!

Just ordered two Michelin X Coach HL Zs Hopefully getting them mounted tomorrow.
__________________
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450
petrel is offline   Reply With Quote
Old 04-04-2019, 11:29 AM   #7
Senior Member
 
Join Date: Jun 2012
Location: Spotsylvania
Posts: 365
Default

Ok tire Gurus, please help me out with this: Went to dealer today and the tires had a date code of 3017! Over a year old already. The salesman apologized and is trying to find "fresher" tires.

I did some research and called another dealer. He stated that there was no way anyone at the Michelin distributor would go to the trouble of checking the date code before shipping the tire to him. "Besides, the tires are warranted from the time of installation, not from the time of manufacture!" He went on to say that they routinely mount tires over a year old, but that does not affect the warranty!

I asked him if the rubber in the tires simply did not degrade while in storage. He said not unless they were sitting in a window!

I'm gonna call Michelin. In the meantime, I'd welcome your thoughts on the topic.
__________________
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450
petrel is offline   Reply With Quote
Old 04-05-2019, 09:01 AM   #8
Senior Member
 
Join Date: Jun 2012
Location: Spotsylvania
Posts: 365
Default

The nice lady at Michelin said that the tires have a maximum shelf life of three years. She went on to say that tires manufactured prior to 2017 have a 5 year warranty. Tires manufactured in 2017 and after have a 7 year warranty.

It is just a prorated tire warranty, which hardly seems relevant in a steer tire situation. I haven't read a single thread about tires giving any warning of failure that would allow you to take advantage of the warranty. If one does fail, the $800.00 or considerably less you might get from the warranty would be small solace after living through a blow-out.

My search continues for "fresh" steer tires!
__________________
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450
petrel is offline   Reply With Quote
Old 04-05-2019, 09:33 AM   #9
Senior Member
 
solo318's Avatar
 
Join Date: Jul 2015
Location: Central Florida
Posts: 124
Default

The wear and tear in tires comes from 3 main things.

1. Use. The constant flexing as the tire rotates (and twists) slowly weakens the belts in the sidewall.
2. UV. The UV from the sun breaks down the rubber and causes the erosion in the sidewall.
3. The air. Each tire has chemicals that are part of the "formula" these chemicals dissolve over time with exposure to the outside environment. This is the most common cause of "dry rot"




the tire warehouses are climate controlled and uv stable. The tires could sit there for years and not erode or dry rot. The real wear and tear on a steer tire is the twisting motion. The twisting is an even bigger issue with our long wheelbase trucks. This obviously doesn't start until the tire is mounted and driven.
Properly stored the UV and the evaporation process don't start until the tire is mounted.
Tire companies produce tires in batches. You might not find a "fresher" tire until they run a new batch of that particular model/size. The manufacture date is important to keep track of, but the in service date is the one most fleets base their maintenance off of.
I'm not telling you when to replace your steers, but just laying out the information that was given to me when I worked for the fleets. (20 years ago )
solo318 is offline   Reply With Quote
Old 04-05-2019, 10:08 AM   #10
Senior Member
 
Join Date: Jun 2012
Location: Spotsylvania
Posts: 365
Default

Thank you very much for your insights. I was buying into the logic of the rubber's suspended animation while in storage, until Michelin said they drew the line at 3 years of storage. That would mean that the tires I was offered were already over half way through their shelf life. If they do not deteriorate in storage, why draw the line on shelf life?

I must admit that this has been an interesting exercise. Two dealers are actively trying to find me fresher tires. One refuses to look and dismisses the storage issue. Michelin themselves seem to come down right in the middle.

I'll see if the last dealer near me comes through today. After that I may start shopping other brands.
__________________

__________________
2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd
2001 Ford Excursion PSD
2017 Ford F450
petrel is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.3

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 11:25 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×