[kpzen]

Originally Posted by binz

If someone wanted fe,then why would they put 215 section 14'' tires?

Binz
Read all the posts.
I mentioned that size because LBM had put up a point mentioning those sizes.
U can consider any size other than 215 also.

[iraghava]

Originally Posted by low_bass_makker

I am saying if both have 215 low and high profile will they have different FE ?

Originally Posted by low_bass_makker

I think both the tyre will have same FE. With a difference of less than 1 % in distance traveled.

No, they will not have the same FE by any means. What you're discounting is that the weight of the tyre in 18" will be significantly more than the tyre in 14". Reasons being different construction, compound & design. Also, remember that having the same OD means that the tyre has overall the same size as the stock tyre so the car's systems do not get fooled by the upsize, that does NOT mean that the weight or rolling resistance is the same.

What an 18" tyre will do is increase the unsprung mass/rolling resistance (due to a heavier tyre & alloy wheel) and thus increase the load on your engine & drive train which will lead to decreased FE.

Originally Posted by binz

If someone wanted fe,then why would they put 215 section 14'' tires?

Ask LBM, he posed the question, he should be able to answer that best.

Originally Posted by rider60

so for my viva crdi, will it be good enough if i go in for 60 profile and 205 width on the same rim size that is R13 or 195/65-R13 compared to the stock 175/70-R13?

Rider - My sincere question & advice to you: Why do you insist on keep on asking the same question(s) again & again?? You've asked the same questions (maybe worded differently) quite a few times before & each time the reply of the experts has been the same. Why do you keep on insisting on starting new threads or posting in different ones for the same question???

If you don't agree or trust with what the experts here recommend then please go ahead & do what you feel like & post the true results here, maybe some of us will get to learn something we'd not discovered till now. But for everyone's sake, please wasting precious server space, bandwidth & other people's personal time (and yours too) by asking the same questions.

They have been replied to in detail earlier & if you have any further queries please use that thread itself rather than starting a new thread for it.

[rider60]

point taken iragava! no more queries on the same anymore, and thank you for following me so closely and the advices! thanks a ton!

[TDR]

Be sure to let us know what you bought, rider60!

As this will surely help other members who own the same car as you do.

TDR

[rider60]

Originally Posted by TDR

Be sure to let us know what you bought, rider60!

As this will surely help other members who own the same car as you do.

TDR

when i do i surely will let you guys know!

[sanjay_delhi]

High performance car / tyre users do not calculate the fuel efficiency, but the vehicle manufacturers do - specially in Europe. For this Most of the European tyre manufacturers produce tyres with low rolling resistance, and this, tyres are produced with Silica in place of Carbon black, and for this reason they are more expensive than regular tyres. If you use these tyres the difference in the cost is taken care by the fuel efficiency of the tyres. These tyres are marked "Energy"on the side wall and are produced as per the Euro 4 norms. which includes low noise and better grip. Try to buy tyres that are produced in Europe, brands like Pirelli and Michelin for better fuel efficiency, life and grip. The tyres performance will take care of the cost difference.

[iraghava]

Actually, it's not just the European brands. Yokohama has been producing Silica based tyres for a long time & now even MRF has brought out a new tyre which is Silica based.

[low_bass_makker]

Originally Posted by iraghava

What an 18" tyre will do is increase the unsprung mass/rolling resistance (due to a heavier tyre & alloy wheel) and thus increase the load on your engine & drive train which will lead to decreased FE.

How much weight difference any figures ?

[kpzen]

Originally Posted by low_bass_makker

How much weight difference any figures ?

Read this
http://www.team-bhp.com/forum/tyre-a...yre-combo.html

[TDR]

Actually, it's not just the European brands. Yokohama has been producing Silica based tyres for a long time & now even MRF has brought out a new tyre which is Silica based.

As did Toyo, like my new 350's!

TDR

[low_bass_makker]

Originally Posted by kpzen

Read this
http://www.team-bhp.com/forum/tyre-a...yre-combo.html

No major info there. Any more details.

[Rama Naveen]

Guys I have upgraded tyres from 175/65,R14. To 175/70,R14.
New ones are Yokohama Earth1 tyres.
Old tyres recommended pressure is 35 front and 32 rear.
Please can some one suggest should I increase or keep the same pressure for high profile tyres???