What size are these?? | Ford Explorer Forums - Serious Explorations

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What size are these??

I found this listing on craigslist. I currently have 255/70 r16 which are stock tires. Can someone tell me if these are smaller or bigger than what I have and if they will fit?

Set of 4 Mastercraft Courser A/T tires 245/75-R16 with about 30K miles on them. $100
 



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The first # is the tread width in mm. So your current tires are 255 mm wide. These tires at 245 mm are narrower by 1 cm.
The second # is the sidewall height as a ratio of the tread width. So, your current tires are 70% of 255 mm tall ( 0.7 x 255 mm = 178.5 mm). The new tires are 75% of 245 mm tall ( 0.75 x 245 mm = 183.75 mm).
Your current tires are 10 mm wider then the Mastercrafts and 5.25 mm shorter.
So, to answer your question the Mastercrafts are BOTH smaller and bigger then your current tire, depending upon which axis your measuring, x or y.
 






little x is dead on, Relatively speaking tho, they will be pretty close to the same size.
 






I'm thinking for 100 bucks and 30 miles of driving they will be worth it! Especially if they are just about the same size. I just don't want them to look smaller!!!I want to go larger but this is what I can handle at this time. Would these throw my spedo off at all?
 












The difference is not very much between the 2 tires...

I'm thinking for 100 bucks and 30 miles of driving they will be worth it! Especially if they are just about the same size. I just don't want them to look smaller!!!I want to go larger but this is what I can handle at this time. Would these throw my spedo off at all?

Stock Tire - 255/70R16 >Search Tires Tire 1 - 245/75R16 >Search Tires
Section Width: 10.03 in 255 mm
Section Width: 9.64 in 245 mm

Rim Diameter: 16 in 406.4 mm
Rim Diameter: 16 in 406.4 mm

Rim Width Range: 6.5 - 8 in
Rim Width Range: 6.5 - 7.5 in

Overall Diameter: 30.05 in 763.27 mm
Overall Diameter: 30.46 in 773.68 mm

Sidewall Height: 7.02 in 178.30 mm
Sidewall Height: 7.23 in 183.64 mm

Radius: 15.02 in 381.50 mm
Radius: 15.23 in 386.84 mm

Circumference: 94.40 in 2397.7 mm
Circumference: 95.69 in 2430.5 mm

Revs per Mile: 692.1
Revs per Mile: 682.8

Actual Speed: 60 mph 100 km/h
Speedometer1: 59.1 mph 98.6 km/h

Speedometer Difference: - Speedometer Difference: 1.362% too slow
Diameter Difference: - Diameter Difference: 1.35%
 






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