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      10-19-2012, 06:06 AM   #1
Drawn05
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Going from 18" to 17"

I have a set of 262 17" 7.0f & 7.5r wheels sitting in my garage. I currently have 261 style with 225/40+255/35 rubber. I was thinking of replacing the 18s with the 17s to see if it improves my 1/4 mile times. I was looking at putting on some toyo r888s but I am not sure if there will be any benefit.

The stock sizes are 225/45R17 but I was thinking of 235/45R17 or would 235/40R17 be better? Any advice appreciated.
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      10-19-2012, 07:30 AM   #2
jb2178
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I'm running 225/45s on my fronts and 235/45s on the rear, star specs, I really like the setup.
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      10-19-2012, 09:23 AM   #3
DRedman45
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if you are really looking at improving the 1/4 time...8.5"+ 17s would be better than the 7.5's...at most 235s are doable, but not much more...and I don't think that will do better than the 261s with 255s

iirc the weights aren't even that far off either
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      10-19-2012, 07:23 PM   #4
Drawn05
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The weight difference with combined wheel and rubber is 2.5kg/5.5lbs lighter per rear and 0.44kg/0.97lbs lighter per front (still have heavy stock rfts).

I just had the Toyo R888 235/40R17 installed anyway so we will see if it is an improvement at the drag strip. It feels so much better on the street and does fell a lot more responsive to acceleration.

It looks way more sleeper-ish as well, which I like.
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      10-20-2012, 12:59 AM   #5
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Well remember, for every 10 lbs of rotating mass is .1 off your ET and for every 100 lbs lost as well. The 17" rim should improve your launch over the 18". If rim size didn't matter then I'm sure the pro's would be running 20", but they're not because they weigh to much and make you loss HP and traction off the line.
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      10-20-2012, 10:43 AM   #6
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Width also has alot to do with it. Better traction = better launch.
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