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BarryJB BarryJB is offline
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Join Date: Feb 2004
Location: Elfin Forest, CA
Posts: 332
Car was in shop a bit longer than expected... I'm not sure how you measured your tire's OD... By calculation the Kuhmo Ecsta XS 265/45-16 OD is 25.39in (16 + [2 x 265 x 0.45/25.4]); by measurement I got a tad under 25-1/2in on the horizontal diameter. Ditto the tread width measures within a mm or so of the 265mm nominal value (I got a tad over 10-3/8in). The fronts (225/50-16) also measured out at the nominal values.

The maximum width (i.e., including sidewall bulges) measured out at just less than 10-5/8in (axle height) to a max of ≈11in near contact patch for the 265 on 9-in rims at 33psi, and likewise 10in to 10-1/2in for the 225 (on 7-in rims) at 32psi.

85 Carrera Coupe, OBD-I 993 3.6 conversion w/(ever-increasing list of mods)óclosing in on 425,000 miles. So far, 100,000 on the 3.6. Mad Wasp (Benelli TnT 1130).
Old 10-28-2011, 10:35 PM
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