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Tires size & towing

tkkz71
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tkkz71 Enthusiast

tkkz71

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I just purchased a used 2022 RST. It has 5.3 10spd trans 3.23 gear with 13,000 miles on it. According to the window sticker, the truck originally came with 18 inch wheels. Someone put the 20” black rims with Toyo Open Country A/T3 P295/55R20  tires on it. My question is this, how much will these tires have an effect on mpg and performance both normal driving and towing? (My truck does not have DFM from the factory) 

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newdude Senior Enthusiast

newdude

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Yes.  Spinning more weight, wider contact patch and your speedo is probably off unless the PO used something to correct it.  About 2mph off.  

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tkkz71 Enthusiast

tkkz71

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51 minutes ago, newdude said:

Yes.  Spinning more weight, wider contact patch and your speedo is probably off unless the PO used something to correct it.  About 2mph off.  

Thank you for response 

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