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Author I've Always Wondered ....
Darkside-Dee
Member
Registered: 20th Jun 08
Location: Newcastle
User status: Offline
25th Feb 09 at 22:07   View User's Profile U2U Member Reply With Quote
how tyre pressure makes a difference to your mpg?

just went and pumped my tyres up for the first time since i got it, my Front driver side wheel was on 22psi should be at 30 according to the book.

cheers
fir3vip3r
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Registered: 14th Jun 06
Location: Stevenage, Hertfordshire
User status: Offline
25th Feb 09 at 22:08   View User's Profile U2U Member Reply With Quote
less rolling resistance when at the correct pressure
Darkside-Dee
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Registered: 20th Jun 08
Location: Newcastle
User status: Offline
25th Feb 09 at 22:09   View User's Profile U2U Member Reply With Quote
ah right, but how does that make your mpg differ?
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
25th Feb 09 at 22:10   View User's Profile U2U Member Reply With Quote
more air makes it more solid meaning less of the tyre tread actually touches the road surface thus making it easier for the engine to move if that makes sense. as there is less friction (might not be the word in looking for) between the tyres and the road.
Darkside-Dee
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Registered: 20th Jun 08
Location: Newcastle
User status: Offline
25th Feb 09 at 22:12   View User's Profile U2U Member Reply With Quote
ah right that makes it more clearer =]

so theres less strain on the engine cos of less friction?

Cheers!
fir3vip3r
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Registered: 14th Jun 06
Location: Stevenage, Hertfordshire
User status: Offline
25th Feb 09 at 22:12   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Darkside-Dee
ah right, but how does that make your mpg differ?


because the engine will have to work harder to make the wheels turn.

id liken it to kicking an underinflated football.

if you hit a properly inflated one softly it will roll a long way, if you hit a deflated one softly it wont travel as far.
youll need to exert more energy to kick the ball the same distance.
mattk
Member
Registered: 27th Feb 06
Location: St. Helens
User status: Offline
25th Feb 09 at 22:13   View User's Profile U2U Member Reply With Quote
Jenko_Sport
Member
Registered: 25th May 06
Location: Stoke-on-Trent
User status: Offline
25th Feb 09 at 22:13   View User's Profile U2U Member Reply With Quote
Deano?
Nic Barnes
Member
Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
25th Feb 09 at 22:14   View User's Profile U2U Member Reply With Quote
well turn a corner with a half deflated tyre, do the same with a tyre on proper pressure. its easier to turn the wheel. also easuer for the engine to turn the wheel aswell kinda thing.

i mean id be suprised if you actually noticed a huge difference in mpg unless previously you were below 20psi and now at 30psi
mattk
Member
Registered: 27th Feb 06
Location: St. Helens
User status: Offline
25th Feb 09 at 22:14   View User's Profile U2U Member Reply With Quote
you ever rode a push bike with a flatty?
Darkside-Dee
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Registered: 20th Jun 08
Location: Newcastle
User status: Offline
25th Feb 09 at 22:17   View User's Profile U2U Member Reply With Quote
yeah, it makes more sense putting it that way

cheers guys! lol
BluKoo
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Registered: 8th Apr 02
Location: Stonehaven (Scotland)
User status: Offline
25th Feb 09 at 22:18   View User's Profile U2U Member Reply With Quote
Put it this way... ever tried cycling a bike with flat tyres?

Edit: bugger, beaten to it.

[Edited on 25-02-2009 by BluKoo]
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
User status: Offline
25th Feb 09 at 22:19   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by BluKoo
Put it this way... ever tried cycling a bike with flat tyres?

Edit: bugger, beaten to it.

[Edited on 25-02-2009 by BluKoo]


by a whole 4 minutes aswell. shame on you
BluKoo
Member
Registered: 8th Apr 02
Location: Stonehaven (Scotland)
User status: Offline
25th Feb 09 at 22:21   View User's Profile U2U Member Reply With Quote
I opened the thread, then carried on doing something, came back and replied
I shall be more attentive next time. Can't have this happening again

 
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