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Discussion Starter #1
Im going to be putting some 20s on my truck, and not sure about the tire size, 20 by 8.5 up front and 20 by 10 out back im thinking that 275/35/20 would be good out back and maybe 245/40/20 up front, does anyone think this will be ok or not. thanks
 

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Camaro Owner, S10 Lover.
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148 Posts
Just ask whoever you buy the tires from. Id call a specialty shop, its hard to plus size large rims like that. Plus, not many places will balance 20" rims.

Whatever size, you'll probably pay $250+ for each tire, plus all the other crap.

John
 

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Bagged!

If you want to keep your speedo close to accurate you should do a little math to figure out what size tires you want. Here are some numbers I put together for you.

35% 40% 45% 50% 55% 60% 65% 70% 75%
15 399 349 311 280 254 233 215 200 186
16 363 318 282 254 231 212 195 182 169
17 327 286 254 229 208 191 176 163 152
18 290 254 226 203 185 169 156 145 136
19 254 222 198 178 162 148 137 127 119
20 218 191 169 153 139 127 117 109 102

These numbers assume your truck came with 215/65-15s. If your truck came with some other siz tire let me know and I'll run those for you!

Rick
 

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That didn't work too well!

So post your e-mail address and I'll e-mail you an Excel spreadsheet that will calculate all this stuff for you!

Rick
 

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Discussion Starter #5
Im not woried about keeping my spedo correct, I will be pulling the engine and tranny in the next few months and replacing them with my ATI procharged Lt1 and auto transmiton. I was just wondering if anyone else was runing these size rims and tires and if they looked ok. thanks
 

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lol you better just tubb it lol
245 40 20 with a 20x8.5 will be ok with a 2 inch drop at most after that it will rub on top of the fenders

rear a 275 35 20 will work fine. 20x9.5 with 5.5 bs for that front on a 20x8.5 bs should be like 4.5

stock s10 tire is 205 75 15
in a 17 inch thats a 255 50 17
in 18 inch thats the same as 255 45 18
the 245 40 20 is 27.8 inches tall so its like 3/4 taller than stock tire
 

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www.AcrophobiA.net
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1,325 Posts
i would call jay at sportruck specialties and ask what size tire he ran up front....he just put 20x8.5 in front of his truck and he has 20x10 out back i know he has 275-35 out there cause i bought his old rims off him.......give him a call...310-632-9854
 

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want my #... 911 beotch!!
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up front if they make it a 235/40 would be good, 235/35 would be better but that means a lot of bent rims:bash:
 

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www.AcrophobiA.net
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the things about bigger rims is, a 35 series for like a 20 is thicker than a 35 series for an 18.....if you are bagged i would go with 35.....if not i would go with what mighty said and go with 235/40
 
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