Go Back   EcoModder Forum > AltModding > Alternative Transportation
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-05-2010, 05:23 AM   #11 (permalink)
Custom User Title
 
Join Date: Jul 2008
Location: Bozeman, MT
Posts: 248

Daily Driver - '02 Pontiac Grand Prix SE
90 day: 18.45 mpg (US)
Thanks: 1
Thanked 6 Times in 5 Posts
The article is for biking, mountain biking. This isn't pavement, it's dirt or sand or rocks. I run 30psi on my tubeless setup when going down, but 35-38psi going up. I'll take a little tire spin for the reduction in RR. There is a noticeable difference in effort required. The last epic trail I ran I had the tires around 32psi going down, and up high the rocks were rough, made for a very bouncy ride. I let a bit out after almost hitting the deck and a few trees, ride improved. I didn't check the exact pressure, but whatever it was the tires didn't bounce as much. When I reached the hardpack lower down (The trail was a 7300-9600-6700ft, EPIC) I pumped a few pounds back in, back to around 33psi. Handled nicely, no washboard so the higher pressure may have helped me run faster.

I don't apply mountain biking logic to driving my car. The two react and handle much too differently to be equated.

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-05-2010, 12:17 PM   #12 (permalink)
mostly harmless
 
Join Date: Oct 2009
Location: Central AR
Posts: 77

Herman - '06 Chevrolet HHR 2LT
90 day: 28.89 mpg (US)
Thanks: 19
Thanked 5 Times in 5 Posts
I'll toss in here, too. It's all about the surface. A lower pressure tire will more readily conform to an irregular surface, and won't blow a lot of energy skittering and bouncing around. This is only on rough surfaces, and on smooth roads, higher pressures rule.
The bike I tried all this on is a Kona Jake-the-Snake that I commuted on for a few years, and I ended up using Michelin Axial Pro 700x23c tires for the majority of that time.
Now, since I'm a bit older and fatter, I needed tires with a bit better weight-carrying ability, and a smoother ride, so I've gone over to Panaracer Pasela TGs, running about 80psi (as opposed to the former 110). It's slower, yes, but I'm finding myself in less and less of a hurry these days anyway.
  Reply With Quote
Old 01-05-2010, 02:30 PM   #13 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
I'm not so sure anyone tried to equate mountain biking and associated tire care to FE?


__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Top 5 most fuel efficient tires (Lowest Rolling resistance: LRR) blackjackel General Efficiency Discussion 144 01-25-2016 11:39 PM
Proposed braking test: comparing tire pressure @ 50 psi vs 35 brucepick EcoModding Central 55 06-11-2011 08:29 PM
The Mechanism Behind Flow Separation LostCause Aerodynamics 46 07-15-2010 07:38 AM
Tire pressure (of winter tires) tasdrouille General Efficiency Discussion 20 08-12-2009 01:38 AM
Valve stem caps that blink when your pressure is low SVOboy EcoModding Central 1 12-23-2007 03:57 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