Tire issue

bms44 · Apr 21, 2017

Hey guys, first post here.

I just bought a 2004 Ram 1500 and it came with 295/60R20 tires. When checking the sticker on the door and by VIN lookup its showing that the size should be 245/70/R17.

My question, if I wanted to get new tires down the road can I go back to a lower tire size to save some gas or would the previous owner have modified the truck to run these big tires?

If I wanted to use the same rim I could just use smaller 20" tires I think?

Thanks for any help!

stimpy433 · Apr 21, 2017

the 295/60R20 are approx. 33.9" tall while the 245/70R17 is only approx. 30.5" tall. (may vary slightly by tire brand). That's almost 3.5" difference so either your speedo is wrong or it's been changed for the bigger setup.

A 265/50R20 would be 30.4" which would be awful lose to the 17" 30.5" and you could still keep the 20" rims.

quietpeen · Apr 21, 2017

You can switch back to the stock size and 17" rims if you want. 295/60/20 is not a stock size so it's not something that could be programmed by the dealer as far as I know, so the only way to do it on that truck is with a tuner like superchips.

The stock size for 20 inch wheels was 275/60/20 which is a shorter tire 33" tall if you wanted to switch to that

bms44 · Apr 21, 2017

quietpeen said:
You can switch back to the stock size and 17" rims if you want. 295/60/20 is not a stock size so it's not something that could be programmed by the dealer as far as I know, so the only way to do it on that truck is with a tuner like superchips.

The stock size for 20 inch wheels was 275/60/20 which is a shorter tire 33" tall if you wanted to switch to that

Liking the price of stock 20's much better.

Is there a way to tell if the Speedo has been adjusted to a certain tire size?

quietpeen · Apr 22, 2017

I seriously doubt it has been adjusted

If you have a portable garmin or other nav. Unit they usually display how fast you are going and you can see if your truck speedo matches the nav.

Tire issue

bms44

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stimpy433

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quietpeen

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bms44

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quietpeen

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