Biggest Tire Possible on Stock Suspension and Setup

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Huck Finn

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Have 265 /55/20s on mine, no rub what so ever, stock suspension, wheels off newer suburban, nice wide look.Speedo only 4 mph off, actually going 4 faster than reading. Have 255 65 17 on my 96 and Speedo still accurate.
 

BigBadRegCab

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I ran 35/12.5/15 with full crank and minor trimming to the bumper no rub on my 88. It had OK power. Would I do it again? Hell no. I'd run 285/75/16 with no crank or minor cranking. BTW I also have 3.42
I was thinking about doing this exact thing accept I don't know what my gear ratio is, it's a 96 Chevy 5.0L 4x4 not the Z71
 

shovelbill

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I was thinking about doing this exact thing accept I don't know what my gear ratio is, it's a 96 Chevy 5.0L 4x4 not the Z71

mark your tire with chalk at the 12 o'clock position.....put a mark on the driveshaft, horizontally......jack up the rear, put it in neutral, turn the tire ONE complete revolution and count how many time the driveshaft mark turns......about 3 3/4 turns is 3.73's, a bit less than 3 1/2 turns is 3.42's.....etc.........this works for the stock size tires. if not stock tire then it will give you you EFFECTIVE gear ratio.
 

magimerlin

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I was thinking about doing this exact thing accept I don't know what my gear ratio is, it's a 96 Chevy 5.0L 4x4 not the Z71
Do you still have the sticker with the rpo codes?? If so the codes will tell you what gear ratio you have......

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BigBadRegCab

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mark your tire with chalk at the 12 o'clock position.....put a mark on the driveshaft, horizontally......jack up the rear, put it in neutral, turn the tire ONE complete revolution and count how many time the driveshaft mark turns......about 3 3/4 turns is 3.73's, a bit less than 3 1/2 turns is 3.42's.....etc.........this works for the stock size tires. if not stock tire then it will give you you EFFECTIVE gear ratio.
Ok thank you
 
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