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205/40R18 Tires

205/40R18 tires have a diameter of 24.5", a section width of 8.1", and a wheel diameter of 18". The circumference is 76.8" and they have 825 revolutions per mile.
Generally they are approved to be mounted on 7-8" wide wheels.
Specs may vary by manufacturer. learn more
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205/40R18 Tire Front
8.1"
24.5"
205/40R18 Tire Side
18 Inch Wheel
Circumference
76.8"
18"
3.2"
825 Revs/Mile
205/40R18
Diameter : 24.5"
Width : 8.1"
Wheel : 18" x 7-8"
Sidewall : 3.2"
Circum. : 76.8"
Revs/Mile : 825

Upsizing Wheels or Tires?

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Nitto Tires
Nitto NT NeoGen 205/40R18
NT NeoGen
All Season | 86W XL
Avg. $131.00
 Ultra High Performance 
$70 REBATE
Bridgestone Tires
Bridgestone Potenza S007A 205/40R18
Potenza S007A
Summer | 86Y XL
Avg. $149.00
 Ultimate Performance 
$70 REBATE
Pirelli Tires
Pirelli P Zero 205/40R18
P Zero
Summer | 86Y XL
Avg. $180.67
 Supreme Performance 
Michelin Tires
Michelin Pilot Sport A/S 3 Plus 205/40R18
Pilot Sport A/S 3 Plus
All Season | 86W XL
Avg. $184.00
 Ultra High Performance 
45K Miles
Pirelli Tires
Pirelli Cinturato P7 Run Flat 205/40R18
Cinturato P7 Run Flat
Summer | 86W XL (RunFlat)
Avg. $194.00
 Ultra High Performance 
Dunlop Tires
Dunlop Sport Maxx RT RunOnFlat 205/40R18
Sport Maxx RT RunOnFlat
Summer | 86W XL (RunFlat)
Avg. $240.00
 Supreme Performance 
Pirelli Tires
Pirelli Winter Sottozero 3 Run Flat 205/40R18
Winter Sottozero 3 Run Flat
Winter | 86V XL (RunFlat)
Avg. $277.00
 Performance 
Bridgestone Tires
Bridgestone Potenza RE050A RFT 205/40R18
Potenza RE050A RFT
Summer | 82W SL (RunFlat)
Avg. $346.00
 Supreme Performance