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speedsatya · 11th May 2005, 01:20

previously i.e when there were only a few cars in the market ,what actually used to happen was that whenever anyone went for alloy rims ,they used to put wide tires as well.
but there was never an upsize which had the same overall diameter(OD) as the oe tires.
so with wider tires and increased OD,the speedo reading would change.as a result the odo would also change.
with increased OD,the speedo will show lesser speeds than actual.so when u r actually doing 100kph maybe the speedo will show 90kph.so when u have actually travelled 100kms ,the odometer will show 90kms.

now becasue of this lesser readings,everyone used to say that its because of the MAG WHEELS or alloy rims.hence the theory abt lesser FE.

u can safely go alloy rims.in addition to improving the looks,they also help in better braking efficiency.also the unsprung weight is reduced.the problem of bent rims is solved.

when u fit wider tires,try to keep the OD close to the OE tires.wider tires will slightly reduce the FE but give better handling.

FE does not reduce because of the rims.

read this http://www.chris-longhurst.com/carbi...yre_bible.html

also the right rim size is also important

http://www.tongseng.com.hk/Page/Product/G3.html

11th May 2005, 01:20	#8 (permalink)
speedsatya BANNED Join Date: May 2004 Location: bangalore Posts: 1,882	previously i.e when there were only a few cars in the market ,what actually used to happen was that whenever anyone went for alloy rims ,they used to put wide tires as well. but there was never an upsize which had the same overall diameter(OD) as the oe tires. so with wider tires and increased OD,the speedo reading would change.as a result the odo would also change. with increased OD,the speedo will show lesser speeds than actual.so when u r actually doing 100kph maybe the speedo will show 90kph.so when u have actually travelled 100kms ,the odometer will show 90kms. now becasue of this lesser readings,everyone used to say that its because of the MAG WHEELS or alloy rims.hence the theory abt lesser FE. u can safely go alloy rims.in addition to improving the looks,they also help in better braking efficiency.also the unsprung weight is reduced.the problem of bent rims is solved. when u fit wider tires,try to keep the OD close to the OE tires.wider tires will slightly reduce the FE but give better handling. FE does not reduce because of the rims. read this http://www.chris-longhurst.com/carbi...yre_bible.html also the right rim size is also important http://www.tongseng.com.hk/Page/Product/G3.html Last edited by speedsatya : 11th May 2005 at 01:22.