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barkl0r · 05-15-2011, 11:58 AM

I wonder if you have tried going to larger diameter for lower cruising RPMS?

Is there a benefit? Is it worth the cost?

I have 14" steel wheels on a Ford Focus 1.8tddi and I am considering picking up a set of 15" alloy wheels.

I will see what has been done to my car - I know often when the larger rims go on they try to match the overall rolling diameter by using a lower profile tyre, but what if you just learned the speed offset and kept the extra size to lower lower cruising RPMS?

I am aware that the mph readout will be different.

I am aware that the car will be less torquey feeling as the larger diameter makes it harder to transfer the power. (in crude terms).

Appreciate any thoughts!

Plenty of time to think this over - just put a new set on. 185/65/14

I must add that the guys at Ivan Kerr Tyres in Carrick have been amazing to deal with. I had a ballache (to put it mildly) with a busted rim, it's replacement and the 3rd replacement! Anyway, 3 days of faffing and it is sorted. They put up with a wild load of tyre changes and didn't charge me more than the cost of a new tyre and fitting. Brilliant! (they also didn't mock my car smelling like a chippie!)

05-15-2011, 11:58 AM	#1 (permalink)
barkl0r EcoModding Lurker Join Date: Apr 2011 Location: Carrickfergus, N Ireland Posts: 24 Thanks: 4 Thanked 0 Times in 0 Posts	Larger wheels for MPG? I wonder if you have tried going to larger diameter for lower cruising RPMS? Is there a benefit? Is it worth the cost? I have 14" steel wheels on a Ford Focus 1.8tddi and I am considering picking up a set of 15" alloy wheels. I will see what has been done to my car - I know often when the larger rims go on they try to match the overall rolling diameter by using a lower profile tyre, but what if you just learned the speed offset and kept the extra size to lower lower cruising RPMS? I am aware that the mph readout will be different. I am aware that the car will be less torquey feeling as the larger diameter makes it harder to transfer the power. (in crude terms). Appreciate any thoughts! Plenty of time to think this over - just put a new set on. 185/65/14 I must add that the guys at Ivan Kerr Tyres in Carrick have been amazing to deal with. I had a ballache (to put it mildly) with a busted rim, it's replacement and the 3rd replacement! Anyway, 3 days of faffing and it is sorted. They put up with a wild load of tyre changes and didn't charge me more than the cost of a new tyre and fitting. Brilliant! (they also didn't mock my car smelling like a chippie!) __________________ Editor - www.brassmusician.com Personal - www.michaelbarkley.com Veg oil, 2000 Ford Focus 1.8 Tddi.