Stumbled across some FE-related links... - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 11-02-2008, 04:48 AM   #1
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
Post Stumbled across some FE-related links...

I was watching How It's Made and they did a segment on remolded tires. I had never heard of remolded* tires (not recapped tires, that's different), but it reminded me to google for regroovable tires, a designation I've often seen, mainly on the side of school bus tires.

While reading an article on regrooving, I saw links to some other interesting tire questions. The links led to a Q&A column written by a commercial tire expert who represents Goodyear. I was interested, so I kept reading.

I read a couple responses to questions about sidewall irregularities -- when you see the one straight bubble-like thing going from rim to tread, that one is okay, it's just a joint that wasn't manufactured smoothly. I read lots of responses about tire age; the expert representing Goodyear repeatedly says that they're fine as long as there are no visible cords/belts and no cracks deeper than 2/32 of an inch.

I stumbled across this:
Quote:
Fuel mileage and Tire Types
Posted by TROY on October 23, 2006

Q. I have read multiple articles and spoken with multiple tire vendors but haven’t be able to choose an appropriate high mileage long wearing Intermodal fleet tire .

What would you consider the most accurate source for this information .

A. All the major tire companies have fuel efficient tires and all will tell you that theirs are the best. Goodyear recently introduced our line of Fuel Max tires (steer, drive and trailer tires with fuel efficient technology). From a fuel efficiency standpoint, I feel our tires are as good as anyone's. They also will deliver very good treadwear mileage. There is no independent source for this information. If you are serious about running the best, you may want to run an SAE fuel economy test. For more information go to http://www.goodyear.com/truck/whatsn...max/index.html
I wondered what an SAE fuel economy test is. So, back to google. The answer, or at least as much of it as the SAE is willing to give away for free, is here. Later, I found the SAE summary of another test, due to another response.

I found one company's description of how they do the tests. They also had some other interesting links.

I found this blog entry from Consumer Reports about how they test for FE. One thing they wrote that caught my eye:
Quote:
Using a very accurate fuel flow meter, we measure the actual amount fuel used in three strictly controlled tests.
I'd like to know more about that.

I also found lots of links about a snake oil product that claims to have produced FE results with SAE testing. It looks fishy to me. The same site had an article about Ford using nanotech materials to help improve FE.

*Remolded tires: They grind off any remaining tread and grind the sidewall smooth, patch any holes, add new rubber, mold the new tread and sidewall, and vulcanize the whole thing. This differs from recapped or retreaded tires, which have the old tread removed and then new tread glued on, depending on who you ask -- the Tire Retread & Repair Information Bureau says that they are vulcanized and the only difference is if the sidewall gets new rubber or not.

That same industry association strongly advocates never running underinflated.

Edit: I keep finding more in that tire column...shouldn't I be doing something more useful with my time?
Yes, it's okay to use tubes in tubeless tires
__________________

__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 11-02-2008, 05:50 AM   #2
Site Team / Moderator
 
Jay2TheRescue's Avatar
 
Join Date: Sep 2008
Location: Northern Virginia
Posts: 4,657
Country: United States
Location: Northern Virginia
On my 74 Chevy p/u when I put new tires on it, one wheel had a tube in it. I figured it was an easy way to fix a leaking tire, so I opted to not put a tube back in that wheel. That was a mistake. That tire went flat every 7-10 days. I ended up going back to the tire dealer and had them put a tube back in that wheel. There must have been something wrong with that wheel. Anyway I never had any further problems with that tire.

-Jay
__________________

__________________






Jay2TheRescue is online now   Reply With Quote
Old 11-02-2008, 06:05 AM   #3
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
I had a couple tires on a 1997 F350 dually 12' stake body dump (which, BTW, is for sale) that wouldn't hold air so we put tubes in them. Later, when we replaced them, we found that there seemed to have been abrasion between the tube and tire, leaving marks as if they had rubbed off some of the tire's rubber. I'm not sure how to reconcile that experience with the advice in that column, except that those tires were pretty badly beat up regardless of tube usage.
__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 11-02-2008, 04:54 PM   #4
Registered Member
 
GasSavers_RoadWarrior's Avatar
 
Join Date: Feb 2008
Posts: 1,652
Now remoulded tires sound okay, provided the carcass hasn't seen excessive wear and fatigue, the belts could be splitting up if someone ran it round half flat all the time for instance. The other problem with them would be you'd get 4 tires with the same tread, but possibly different internal construction, more or less belts, plies in different directions etc, meaning they might behave different... so if you could get your own tires remoulded that you knew you'd treated right, it might be a good thing, but otherwise, it's something you'd only wanna do to a car you deliver pizzas in round the city all the time or something, not one you take on long trips.
__________________
I remember The RoadWarrior..To understand who he was, you have to go back to another time..the world was powered by the black fuel & the desert sprouted great cities..Gone now, swept away..two mighty warrior tribes went to war & touched off a blaze which engulfed them all. Without fuel, they were nothing..thundering machines sputtered & stopped..Only those mobile enough to scavenge, brutal enough to pillage would survive. The gangs took over the highways, ready to wage war for a tank of juice
GasSavers_RoadWarrior is offline   Reply With Quote
Old 11-02-2008, 06:00 PM   #5
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
Yeah, I think remoulded tires, like recaps/retreads and such, are mainly used on big commercial trucks and most popular in big fleets where you can have your own tires redone and returned to you. I have bought anonymous LT-series recaps for the dumptruck that preceded the one I mention above, though.
__________________
This sig may return, some day.
theholycow 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel cut-off threshold speeds GasSavers_Rotareneg General Maintenance and Repair 10 08-13-2007 06:27 AM
GasSavers.org Stickers Matt Timion Fuelly Web Support and Community News 7 10-12-2006 04:48 PM
FFI GasSavers_MPGmaker Introduce Yourself - New member Welcome 39 05-30-2006 04:31 PM
State of the Union address touches on "oil addiction." Matt Timion General Discussion (Off-Topic) 31 02-06-2006 04:38 PM
Where to get parts? What parts do we need? Matt Timion Electric and Solar powered 11 09-19-2005 09:37 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 03:21 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.