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C81

Rims for SMA C81 in Easy-to-Read Graphs

Average rim size per years

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Quick notes on SMA C81 rims

    • Average rim diameter: 14 in. (356 mm)
    • Average rim width: 4.5 in. (114 mm)
    • Max speed on original rims: 109 mph (175 km/h)
    • Load to one rim: 283 kg (623 lbs)
    • Rim diameter to car height: 25%
    • Power in 1 mm of rim width: 1.01 hp/mm (0.74 kW/mm)
    • Summary width of rims: 18 in. (457 mm)
    • Rim circumference: 44 in. per wheel (1118 mm)
    • Rimsley rating: 2 / 10

Original 2006 SMA C81 rim size

  • 1.8 — 4.5 in. width and 14 in. diameter

    Possible tire width

  • 1.8 — 145 mm min and 175 mm max

    • Disc diameter to power ratio

  • 1.8 — 8 hp per 1 in. (6 kW/in)

    Vehicle Rim width and diameter Rim diameter to torque Rim width to diameter ratio Total rims circumference Total rims width
    1.8 4.5J x 14
    (114 x 356 mm)     		2.3 mm to 1 Nm 32.1% 176 in.
    (4470 mm)     		18 in.
    (457 mm)
    Vehicle 1.8
    Rim width and diameter 4.5J x 14
    (114 x 356 mm)
    Rim diameter to torque 2.3 mm to 1 Nm
    Rim width to diameter ratio 32.1%
    Total rims circumference 176 in.
    (4470 mm)
    Total rims width 18 in.
    (457 mm)