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Old 11-11-2008, 03:34 PM   #18 (permalink)
BlackDeuceCoupe
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BDC's Honda CiViC HX/Si - '98 Honda CiViC HX/Si (HX Shell/Si Swap)
90 day: 40.56 mpg (US)
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Quote:
Originally Posted by jamesqf View Post
[L]arge rims & thin tires. Which weighs more? That is, if you keep the same tire diameter, can you save weight/inertia by going to a larger, lightweight wheel?
The general consensus, in the Honda community, is metal is more important than rubber, e.g. metal weighs more than rubber - but I think it all depends on the tire!

A pound of lead and a pound of feathers weigh the same, you know?

Using my ride as an example:
  • 185/65-14
  • 195/55-15
  • 195/50-16
  • 205/40-17
...are basically the same diameter.

There is no question that larger diameter rims weigh more, even in best-case scenarios!

Enkei ES-Tarmac:
  • 14x6 (8.7 lbs)
  • 15x6.5 (10.7)
  • 16x7 (13.7)
  • 17x7.5 (14.8)

I would *guess* that less sidewall means less weight, but...

I don't *think* that would offset the additional weight/inertia of the heavier rim.

Once again, it all depends on the tire, but...

It's counterintuitive to *believe* larger tires weigh less than smaller ones...
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