Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-14-2013, 05:12 PM   #51 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,474
Thanked 2,949 Times in 1,843 Posts
Here's an interesting article on these kinds of tires:

Interstitial Ad - Modern Tire Dealer

__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
The Following User Says Thank You to NeilBlanchard For This Useful Post:
sheepdog 44 (11-14-2013)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-14-2013, 07:22 PM   #52 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,525 Times in 1,126 Posts
BIG bicycle tires!
  Reply With Quote
Old 11-14-2013, 07:43 PM   #53 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,474
Thanked 2,949 Times in 1,843 Posts
The VW XL1, the BMW i3,, and the Edison2 VLC use tall (large diameter) narrow tires. That seems to point to the efficiency advantage. Oliver Kuttner mentioned this kind of tire in the video I posted on the Edison2 thread.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 11-14-2013, 09:49 PM   #54 (permalink)
Master Ecomadman
 
arcosine's Avatar
 
Join Date: Nov 2010
Location: Chicago area
Posts: 1,149

sc1 - '98 saturn sc1
Team Saturn
90 day: 43.17 mpg (US)

Airplane Bike - '11 home built Carp line Tour

rans - '97 rans tailwind

tractor - '66 International Cub cadet 129

2002 Space Odyssey - '02 Honda Odyssey EX-L
90 day: 28.25 mpg (US)

red bug - '00 VW beetle TDI

big tractor - '66 ford 3400

red vw - '00 VW new beetle TDI
90 day: 58.42 mpg (US)

RV - '88 Winnebago LeSharo
90 day: 16.67 mpg (US)
Thanks: 20
Thanked 332 Times in 225 Posts
Id like a set on my Saturn.
__________________
- Tony

  Reply With Quote
Old 11-15-2013, 01:32 PM   #55 (permalink)
NightKnight
 
NachtRitter's Avatar
 
Join Date: Dec 2008
Location: Placerville, CA
Posts: 1,594

RippinRoo - '05 Subaru Legacy Wagon 2.5 GT
Subaru
90 day: 21.16 mpg (US)

Helga - '00 Volkswagen Jetta TDI
TEAM VW AUDI Group
Diesel
90 day: 53.91 mpg (US)

Olga - '03 Volkswagen Jetta Wagon
90 day: 46.24 mpg (US)
Thanks: 303
Thanked 311 Times in 186 Posts
Quote:
Originally Posted by NeilBlanchard View Post
Here's an interesting article on these kinds of tires:

Interstitial Ad - Modern Tire Dealer
Interesting statement from that article:
Quote:
By optimizing the structure of tires and using the most appropriate materials, Bridgestone achieved a rolling resistance coefficient 30% lower than conventional tire sizes such as 175/65R15.
  Reply With Quote
Old 11-15-2013, 01:43 PM   #56 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 25,856
Thanks: 7,278
Thanked 8,116 Times in 6,656 Posts
When I saw you had bumped the thread, I hoped there would be pricing, but I'll settle for 'in production'.

Quote:
Bridgestone Corp.ís Ecopia ologic tire, size 155/55R19, has a larger vertical diameter and increased air pressure to limit changes in the contact patch. Introduced as the Large and Narrow concept tire, it is now in production, the company reports.




What happened? The prototype has a diameter ~3.5x the width while the 'production tire is ~6.5x. and it looks like a 'cheater slick'. Among the claimed benefits are lower road noise and better anti-hydroplaning. With that [lack of] circumferential grooves?

==>Red Model A Ford wire wheels on a '61 VW panel van.
  Reply With Quote
Old 11-15-2013, 02:34 PM   #57 (permalink)
Master Ecomadman
 
arcosine's Avatar
 
Join Date: Nov 2010
Location: Chicago area
Posts: 1,149

sc1 - '98 saturn sc1
Team Saturn
90 day: 43.17 mpg (US)

Airplane Bike - '11 home built Carp line Tour

rans - '97 rans tailwind

tractor - '66 International Cub cadet 129

2002 Space Odyssey - '02 Honda Odyssey EX-L
90 day: 28.25 mpg (US)

red bug - '00 VW beetle TDI

big tractor - '66 ford 3400

red vw - '00 VW new beetle TDI
90 day: 58.42 mpg (US)

RV - '88 Winnebago LeSharo
90 day: 16.67 mpg (US)
Thanks: 20
Thanked 332 Times in 225 Posts
Quote:
Originally Posted by freebeard View Post
When I saw you had bumped the thread, I hoped there would be pricing, but I'll settle for 'in production'.

What happened? The prototype has a diameter ~3.5x the width while the 'production tire is ~6.5x. and it looks like a 'cheater slick'. Among the claimed benefits are lower road noise and better anti-hydroplaning. With that [lack of] circumferential grooves?

==>Red Model A Ford wire wheels on a '61 VW panel van.
Skinny tires don't hydroplane because there is no plane to hydro on. It goes by the square of the width, a tire twice as wide displaces twice the amount of water twice the distance, so the force pushing the tire off the pavement is 4 times.
__________________
- Tony

  Reply With Quote
The Following User Says Thank You to arcosine For This Useful Post:
niky (11-16-2013)
Old 11-15-2013, 05:35 PM   #58 (permalink)
.
 
Join Date: Dec 2011
Location: Salt Lake valley Utah
Posts: 922
Thanks: 114
Thanked 396 Times in 223 Posts
Yes, as a user of relatively skinny tires i very much miss running through puddles at speed and getting a nice splash.

I'm glad something is coming of this. Tires are a big deal to getting good mpg and maximizing the useful power from a very small engine.
__________________
I try to be helpful. I'm not an expert.
  Reply With Quote
Old 11-16-2013, 12:31 AM   #59 (permalink)
Master EcoModder
 
Join Date: Aug 2010
Location: Philippines
Posts: 2,173
Thanks: 1,739
Thanked 589 Times in 401 Posts
Quote:
Originally Posted by arcosine View Post
there is no plane to hydro on
So help me, that got a chuckle. Have to remember that the next time I write an article on tires...

Skinny tires absolutely rock in the pouring rain. Did a slalom test in a few factory pick-ups, and the variant on the skinniest tires did pretty well, despite being shod in long-wearing ungrippy van meats... while higher end variants wearing wider "HT" tires took more effort to navigate the wet course. And we didn't even have enough water to form standing puddles. the higher pressure on the contact patches was enough to make the difference.
  Reply With Quote
Old 11-16-2013, 04:39 AM   #60 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 25,856
Thanks: 7,278
Thanked 8,116 Times in 6,656 Posts
Quote:
Skinny tires don't hydroplane because there is no plane to hydro on. It goes by the square of the width, a tire twice as wide displaces twice the amount of water twice the distance, so the force pushing the tire off the pavement is 4 times.
Where does the extra water come from? My memory of research in the 70s [citiation needed] is that the only thing that made any difference was high air pressure and large circumferential grooves to carry the water past the tread.

Quote:
And we didn't even have enough water to form standing puddles. the higher pressure on the contact patches was enough to make the difference.
Damp pavement then. VW Beetles drive the speedometer from the left front wheel. When you hit standing water and the speedo needle drops toward zero, you know your hydroplaning. For years I ran 145-15 on the front and 165-15 on the back. But you really find out, downhill in the mountains, there's more brakes than tires. Now it's 165-50-15 in front.

I've got a little brass caliper I've been holding up to the screen, and I've concluded the early picture is a 7" width on 19", and the Ecopia branded tire is about 4 1/4", so pretty close to 155mm.

Load and speed ratings?

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com