Quote:
Originally Posted by bheinen74
2 weeks ago, I picked up the set of 4 Michelin X-Ice used on craigs, size is 215/60/16
According to my miata tire calc, they are going to be about ~3% taller
this past weekend, I picked up the set of 4 above RX-7 rims.
Ordered set of bulge acorn lugnuts but they won't be here til this weekend.
Took ONE wheel and tire to a service station monday, and the service guy mounted up the one.
Will have to test fit when the lugnuts get here. BTW, these Michelins, must be a little oversized from what Miata tire calc says. will jsut have to see.
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It sounds like it will be 5.2% harder on your transmission.
Original Fitment Proposed Fitment
width 225 mm width 215 mm
aspect ratio 50 % aspect ratio 60 %
wheel diameter 16 in wheel diameter 16 in
offset 50 mm offset 50 mm
original diam. 24.86 in proposed diam. 26.16 in
Potential Fitments: Geometry Calculations:
tire aspect wheel change in ride height 16.5 mm
width ratio diam inwards add'l width req'd -5.0 mm
245 40 17 outwards add'l width req'd -5.0 mm
255 30 18 add'l total tire height 33.0 mm
265 20 19 add'l vert clearance req'd 16.5 mm
Instructions: additional rolling diameter 103.7 mm
Change values in boxed cells change in drive ratio 5.2 %
to see effects of tire fitment
changes. Unboxed cells show Speed Calculations:
resulting geometry. Hold the speedometer reading actual speed
cursor over inputs or results to 120 kph or mph 126.3 kph or mph
view associated pop-up help. desired speed speedometer reading