Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-02-2008, 08:02 AM   #1 (permalink)
EcoModding Apprentice
 
OfficeLinebacker's Avatar
 
Join Date: Apr 2008
Location: Maryland
Posts: 113
Thanks: 0
Thanked 1 Time in 1 Post
All the donuts you could want!

I went to a used tire place yesterday and asked if they had any donuts. The owner let my son and I to "donut alley." It's basically a big truck and a trailer full of donuts. We dug through the stuff for about an hour and came up with about six 14" donuts with 4-bolt 100mm pattern. Two of them were exact matches so we bought them for $25/ea. The asking price was $35/ea but the owner was cool.

So anyway if you look around, you can find these deals!

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-02-2008, 08:40 AM   #2 (permalink)
EcoModding Newbie
 
Join Date: Apr 2008
Location: Southern Ontario
Posts: 284

Parachute - '03 Chevrolet Tracker LX
90 day: 28.55 mpg (US)

Peon - '95 Plymouth Neon Highline baby!
90 day: 31.39 mpg (US)

Slocus Wagon - '06 Ford Focus SE
Thanks: 0
Thanked 2 Times in 2 Posts
I assume you are going to put the donuts on your car? I all for abusing the safety margins of tire design but I think you may attract some unwanted attention from the police. Also I would do some wet road stopping tests.

I have found that trailer tires have no where near the winter traction of even crappy all season tires and maybe donuts are the same?

I am interested in seeing the difference in rolling resistence though, I would assume donuts are better but by how much?
Ian
__________________


  Reply With Quote
Old 09-02-2008, 10:31 AM   #3 (permalink)
EcoModding Apprentice
 
OfficeLinebacker's Avatar
 
Join Date: Apr 2008
Location: Maryland
Posts: 113
Thanks: 0
Thanked 1 Time in 1 Post
The rolling resistance is probably marginally better, but the aero affects are where it's at.

Trust me, the cops around here don't care.
  Reply With Quote
Old 09-02-2008, 02:03 PM   #4 (permalink)
Red
Master EcoModder
 
Red's Avatar
 
Join Date: Mar 2008
Location: SF Bay Area
Posts: 713
Thanks: 1
Thanked 8 Times in 8 Posts
Are you looking to reuse the rim or the whole doughnut? While they do have a lower RR and contact patch, they still weren't designed for long term use or high speed. Not to rain on your parade or anything
  Reply With Quote
Old 09-02-2008, 03:21 PM   #5 (permalink)
EcoModding Lurker
 
Join Date: Aug 2008
Location: Virginia
Posts: 87

Brown Bus - '98 GMC Sonoma X-Cab SLS
90 day: 31.37 mpg (US)
Thanks: 0
Thanked 2 Times in 2 Posts
Once I had a car where the (alloy) spare rim was considered disposeable. Sports car, Ford wanted to save weight. The rim was so light, it wasn't designed to outlive the spare. A limited mileage tire AND rim...
__________________
Meh Truck
  Reply With Quote
Old 09-02-2008, 03:59 PM   #6 (permalink)
EcoModding Lurker
 
Join Date: Aug 2008
Location: Maryland
Posts: 92

Taurus - '99 Ford Taurus SE
90 day: 17.89 mpg (US)

Windstar1 - '97 Ford Windstar Cargo
90 day: 16.99 mpg (US)

Vulcan - '97 Kawasaki Vulcan 750
90 day: 45.96 mpg (US)

Suzuki - '09 Suzuki SX4 Technology AWD
90 day: 24.62 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
aw i thought he meant donuts like jelly filled.
  Reply With Quote
Old 09-02-2008, 04:45 PM   #7 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 81 Times in 53 Posts
I would like to focus solely on the safety aspect of running small spare tires in the back. More precisely on the probabillity of a sudden and unexpected blowout from what would be normal use for regular tires. I don't care about traction, I don't care about wear, I don't care about sudden failure from hitting a pot hole, I can compensate through the way I drive to account for that. All I care about is a which point will it unexpectedly fail if I drive on the highway at 50 mph. Assuming the spares are relatively new, say less than 4 years, or even brand new.

How are those tires constructed? Are they significantly structurally different than regular tires?
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 09-02-2008, 06:08 PM   #8 (permalink)
Master EcoModder
 
Join Date: Jun 2008
Location: NorCal
Posts: 451
Thanks: 1
Thanked 40 Times in 26 Posts
Space saver spares, if that's what you're talking about, have a very limited mileage lifetime.

I don't think you'd be happy using them as everyday tires, even if they were free.
  Reply With Quote
Old 09-02-2008, 06:12 PM   #9 (permalink)
EcoModding Apprentice
 
OfficeLinebacker's Avatar
 
Join Date: Apr 2008
Location: Maryland
Posts: 113
Thanks: 0
Thanked 1 Time in 1 Post
I haven't put the donuts on the car so no danger there. The trailer we dug through has several tires only in it. The owner of the place said sometimes they replace the actual tire on the donut (presumably quite rarely). I didn't look closely but the tires appeared of normal The vast majority of the donuts were new or like-new. Owner cited trade in for full sized spare as primary reason to dispose of donut.
  Reply With Quote
Old 09-02-2008, 06:22 PM   #10 (permalink)
EcoModding Apprentice
 
OfficeLinebacker's Avatar
 
Join Date: Apr 2008
Location: Maryland
Posts: 113
Thanks: 0
Thanked 1 Time in 1 Post
I think that the main issue is heat dissipation. There's not much rubber to absorb the heat, that's the limiting factor when it comes to speed ratings, is heat dissipation and resistance.

That, and the width of the tread is like half the stock width. The thing is smaller so it turns faster at any given speed so you can assume the tread life, is less than half. Add in that it's not designed to last and make your own assumptions.

That all said, we all know of cars we've seen where the people have driven around on the spare for weeks with no ill effects other than to their reputation. Also, I am sure different brands of rubber and different manuf. of rims make a big difference. The ones I picked out are Firestones, which have a reputation for great tread life.

I also admit that I wonder just how bad the car would oversteer with the donuts on the rear. Given that the car pushes like a dump truck in stock trim, and has a rear sway bar about the diameter of a #2 pencil, it'd be fun to drift with it. Of course that's completely counter to what we're trying to accomplish here, but I am a contrarian among contrarians. Don't flame me!


Last edited by OfficeLinebacker; 09-02-2008 at 06:23 PM.. Reason: couched last pp more in the hypothetical
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
what TYPE of tire is the most fuel efficient? blackjackel EcoModding Central 13 06-29-2008 10:11 PM
wtb: spare tire donuts, MN or WI 125/80 R13" Ryland For Sale 1 06-28-2008 01:16 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com