Shoes; I can haz?

[Arctic Fox]

Thin. I would fill it with something [expanding foam?] for solidity. Put full moon caps, wheel well skirts, and who would know they're anorexic tires?



Found here: Car Spare Tire Thin Mini products, buy Car Spare Tire Thin Mini products from alibaba.com

[Arragonis]

Space savers have a speed limit, so maybe not to good.

[euromodder]

Originally Posted by Arragonis

Space savers have a speed limit, so maybe not to good.

Durability is an issue as well.
And when Darin / MetroMPG mesured the rolling distance with 4 space savers, the results were far from impressive : they were obviously not built for low rolling resistance.

Thinness will only gain you so much - bad RR can easily make things worse.

What you want for improved fuel consumption is a light, narrow, low RR, high LI tyre that can be pumped up to high psi.

[mcrews]

NO.
discussed at length.
Search "donut spare"

[racerc2000]

how bout this. run those wheels with motorcycle tires? considering your vehicle is within the weight limits?

but it would not be a cheap option in tires.

[mcrews]

read previous threads to understand issues.
Motorcycle tires do not solve anything.

Can you post some actual testing to support your recommendation?

If you would read some of the existing threads, you will see(as was pointed out to you already) that we try not to 'guess and crapshoot'. We try to post information that can be supported with facts or testing.

1. Can you post a link to the size tire that you 'think' would fit....
2. can you link any other site where this has worked or not work....

[Arctic Fox]

I'd prefer not to suppress ideas, mcrews. There's always a chance that not all variables have been exhausted. I'm currently searching as per your request and I still see options.

racerc2000: I had thought about motorcycles as well, but the problem I find right from the start is finding a rim that 1) a cycle tire can fit on that 2) also fits on my car. Considering I thought about buying a $1500 set of snow tires from Canada, I'd be interested in knowing how much the cost of your idea would compare, too.

My thoughts on mini-spare tires is that they're too soft - it's one reason I thought that maybe by filling it with "something", it would improve performance. Think train wheels.

[mcrews]

There is a difference between surpessing ideas and rehashing topics that can be easily searched and read.

There are two types of forums.
1. where posters just shoot of the cuff and then discuss 'feelings' to no result.
2. where poster provide insight and facts.

In the first one, you can do searches and find the same topic over and over because no one ever uses the search function. (bassicly lazyness)
In the second one (like ecomodder.com) you see thoughtful and reseached answers.
It is reflected in the posts, -longer that 12 words-.
The idea is to stumulate the thought process before posting. googling the net or searching the forum.
You may not notice this, but it is what makes this forum different.
Racer has posted twice and both times he's been reminded of the need to seach and validate.

[racerc2000]

4 donut spare rims should fit motorcycle tires. in most cases motorcycle tires wil be 16" 18" or 20"

16s primarily being rears. and can be had in sizes up to 225 maybe more.
300/35-18 seems to be one of the largest bike tires.....

heres a good place looking for sizes.

Motorcycle Superstore Tire Selector

it would appear there are some very small sizes also. like 150/70-13s

on a very light vehicle these would be ideal as I dont think the sidewalls have much flex being the tirs tread prettymuch goes from rim edge to rim edge. it would also be a good aero tire. but I wonder how handling would be? but it shouldnt matter much as I dont see eco modders trying to speed or cut fast corners etc. as it would defeat the economy purpose

[Sven7]

I don't think the lack of stopping power would be worth it, and furthermore, motorcycle tires are not made to give traction laterally like car tires. On a bike the weight is always pressing straight down on the tire because it leans into turns. On a car the weight is always trying to push them one way or another because the goal is to keep the tire planted at the same angle. I'm not sure of this but it would seem that they are constructed differently to handle the differing loads.

A good hypermiler knows how to maintain momentum through turns, just like a race car driver. Would bike tires undermine this?