Omega Owners Forum
Chat Area => General Discussion Area => Topic started by: wakeyomega on 30 March 2008, 21:24:23
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Hi all
I have a flyer from costco with a special offer (20% off) on Michelin 'energy saver' tyres (they say that they save on fuel) They also say that when fitted at a Costco centre they fill them with Nitrogen ("improves handling, fuel effeciency and tyre life").
I've no idea if 20% off is a good price because I don't know what the normal retail price at costco is yet, BUT.....
1. Has anybody any experience with these tyres? If so, do they really save you fuel?
2. I've never heard of Nitrogen filled - any experience out there?
3. Does anyone else use Costco for tyre supply? If so, any good?
Thanks Pat
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nitrogen??? not sure about that :-?
prob just another money makeing scam scheme :-X
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All I know is that nitrogen filled tyres are not prones to anything but minimal effect of expansion through heat which can lead to more even tyre wear if the geometry is perfect etc etc.
As to the claims of energy saving I dont have a scooby!!
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Hi all
I have a flyer from costco with a special offer (20% off) on Michelin 'energy saver' tyres (they say that they save on fuel) They also say that when fitted at a Costco centre they fill them with Nitrogen ("improves handling, fuel effeciency and tyre life").
I've no idea if 20% off is a good price because I don't know what the normal retail price at costco is yet, BUT.....
1. Has anybody any experience with these tyres? If so, do they really save you fuel?
2. I've never heard of Nitrogen filled - any experience out there?
3. Does anyone else use Costco for tyre supply? If so, any good?
Thanks Pat
The main gases in air are nitrogen, 78%. Oxygen, 21%, others, 1%. Among the others are carbon dioxide, about 0.03%, noble gases, about 0.9% and varying amounts of water vapour depending on the weather.
Sounds like you should ask them how pure their nitrogen charged tyres are.
How are you going to pump them up again?
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flipi eck albertross, are u a rocket man. and yes how do you refill the tyres, not at the local forcourt ?
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according to some blurb I read nitrogen molecules are larger than oxygen so less prone to seeping through the construction of the tyre :-/ good point about how do you blow them up.
Costco used to be really good on tyre prices a few years ago but I have found they seem to be less competitve nowadays.It allways pays to shop around for special offers etc :y it's made so easy now with the internet
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I take it you wish to use the overly hard and stupidly expensive Michelins on your wheel barrow.....as they dont suit cars if you drive with any spirit!
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Hi all
I have a flyer from costco with a special offer (20% off) on Michelin 'energy saver' tyres (they say that they save on fuel) They also say that when fitted at a Costco centre they fill them with Nitrogen ("improves handling, fuel effeciency and tyre life").
I've no idea if 20% off is a good price because I don't know what the normal retail price at costco is yet, BUT.....
1. Has anybody any experience with these tyres? If so, do they really save you fuel?
2. I've never heard of Nitrogen filled - any experience out there?
3. Does anyone else use Costco for tyre supply? If so, any good?
Thanks Pat
The main gases in air are nitrogen, 78%. Oxygen, 21%, others, 1%. Among the others are carbon dioxide, about 0.03%, noble gases, about 0.9% and varying amounts of water vapour depending on the weather.
Sounds like you should ask them how pure their nitrogen charged tyres are.
How are you going to pump them up again?
steady now ;D ;D ;D ;D
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How are you going to pump them up again?
Costco will apparently fill them up for you. I asked. Not much use if you live a distance from your nearest Costco though.
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I needed a new front tyre a while ago and thought i would replace like for like. Rang round and was quoted between £140 to £170 for a Michelin. Thought i would try Costco as i had used them before on my Carlton i had at the time. Costco at MK didn't have the tyre i needed in stock and the only tyre they had in my size could only be fitted as a pair, i was told, so both would need to be changed. Price was £117+vat. Didn't bother and went over road to tyre fittersand paid £125 all in for a Continental. Don't know if Costco was trying to pull proverbial wool over eyes but needed tyre done that evening as i was going to Liverpool next day. E-Tyres are worth a try as well. Good branded tyres at a good price. Would have used them instead of Costco but could'nt get tyre until next day.
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flipi eck albertross, are u a rocket man. and yes how do you refill the tyres, not at the local forcourt ?
Nope, a Diver who's qualified to use "enriched air", which is basically air with less nitrogen and more oxygen and that lasts you longer.
More exact details are:
- Nitrogen (N2): 78.1%
- Oxygen (O2): 20.29%
- Carbon dioxide (CO2): 0.03%
- Water vapour: 0.4%
- Inert gas: 0.95%
- Dust particles, sulphur oxides, nitrogen oxides, etc.: variable
according to some blurb I read nitrogen molecules are larger than oxygen so less prone to seeping through the construction of the tyre :-/ good point about how do you blow them up.
Costco used to be really good on tyre prices a few years ago but I have found they seem to be less competitve nowadays.It allways pays to shop around for special offers etc :y it's made so easy now with the internet
Yes, but not much, as a quick comparison, we can use the covalent radius defined as 1/2 the distance between to identical covalently bonding nuclei. This is measured in picometers (1 pm= 1x 10-12 m). Nitrogen's covalent radius is 73pm so the length of a nitrogen molecule ought to be 4 X 75pm or 300 pm. A molecule of oxygen ought to be just a shade smaller 4 X 73pm or 292pm. So an oxygen molecule ought to be a little less than 3% smaller than a nitrogen molecule.
Diving, gotta be safe! :y
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flipi eck albertross, are u a rocket man. and yes how do you refill the tyres, not at the local forcourt ?
Nope, a Diver who's qualified to use "enriched air", which is basically air with less nitrogen and more oxygen and that lasts you longer.
More exact details are:
- Nitrogen (N2): 78.1%
- Oxygen (O2): 20.29%
- Carbon dioxide (CO2): 0.03%
- Water vapour: 0.4%
- Inert gas: 0.95%
- Dust particles, sulphur oxides, nitrogen oxides, etc.: variable
according to some blurb I read nitrogen molecules are larger than oxygen so less prone to seeping through the construction of the tyre :-/ good point about how do you blow them up.
Costco used to be really good on tyre prices a few years ago but I have found they seem to be less competitve nowadays.It allways pays to shop around for special offers etc :y it's made so easy now with the internet
Yes, but not much, as a quick comparison, we can use the covalent radius defined as 1/2 the distance between to identical covalently bonding nuclei. This is measured in picometers (1 pm= 1x 10-12 m). Nitrogen's covalent radius is 73pm so the length of a nitrogen molecule ought to be 4 X 75pm or 300 pm. A molecule of oxygen ought to be just a shade smaller 4 X 73pm or 292pm. So an oxygen molecule ought to be a little less than 3% smaller than a nitrogen molecule.
Diving, gotta be safe! :y
:o :o :o :o :o :o :o :o :o :o
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I use Costco, but not for tyres, as they only sell Michelin, and I wouldn't put them on a push bike.
Nitrogen is supposed to keep more even pressure over temperature.
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I would have thought that it would be smaller than 4 times given they travel around as O2 and N2. Wouldn't 4 times give the size of two atoms sat next to each other...
Having said that, its been a few years since A level chemistry!
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Having said that, its been a few years since A level chemistry!
I bet it's been even longer for me since 'O' level Chemistry!
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;D
Nah, I'm cheating ( a bit); I do dive and I do use enriched air, so I do know the constituent parts of air and thier proportions, but the covalency b0ll0x was pinched from a site which deals with this Nitrogen in tyres m'larkey in detail: (sadly enough I do understand it and know why too, but they aren't my words)
http://theforcethat.blogspot.com/2007/02/nitrogen-for-tires.html
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;D
Nah, I'm cheating ( a bit); I do dive and I do use enriched air, so I do know the constituent parts of air and thier proportions, but the covalency b0ll0x was pinched from a site which deals with this Nitrogen in tyres m'larkey in detail: (sadly enough I do understand it and know why too, but they aren't my words)
http://theforcethat.blogspot.com/2007/02/nitrogen-for-tires.html
not such a smart arse then dude !! ;D ;D
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and nitrogen is more for high performance tyres bit of a gimmick really and stay away from rock hard michelins !! :y
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so your not a rocket sientist, thats a shame ;) alby
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Military aircraft tyres are inflated using Nitrogen as standard .... :)
Nitrogen is used for safety reasons and to ensure that tyres are always at a constant pressure. Compressed air, the traditional medium for inflating car tyres, contains both oxygen (21%) and nitrogen (78%). and varying amounts of water vapour.
The rubber tyre is like a membrane, through which oxygen permeates three times faster than the nitrogen. The result is that the oxygen slowly leaks out through the rubber walls, and the under-inflation leads to higher tyre wear with a consequent decrease in safety.
The increased temperature stability is an important factor, as the tyres are at about -43 C when at altitude, and quickly heat to around +80 C on a "normal" landing. A "high energy" landing (short strip, heavy weight or high speed emergency) will attain even higher temperatures.. as will a rejected (aborted) take-off.
HTH
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so your not a rocket sientist, thats a shame ;) alby
It was good while it lasted ::)
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;D ;D ;D ;D
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I use Costco, but not for tyres, as they only sell Michelin, and I wouldn't put them on a push bike.
Nitrogen is supposed to keep more even pressure over temperature.
When I had my 600 they were the best motor bike tyres on hte market, radials
Racing forced the tyre companies hand - certain classes said road tyres - road tyres got grippier