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I'm not cool...
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Discussion Starter #1 (Edited)
anyone have boydcoddington smoothies?

I ordered smoothies today for my black beauty. I got 20's all around instead of the 18-20 combo they have done in the past. bigs -n- littles isn't my thing although I understand the look. :thumbs
I was wondering how many of us are sporting smoothies on our ssRs. would any of you who have them please post what you think of them and picks if possible!
thanks :flag
 

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I too was getting the Smoothies!! I've been trying to find a comperable tire choice for the 20" rims, what did you come up with??

GR
 

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mikepowell: I7m sure it's not enough to be a problem, but increasing the diameter of the front wheels ONLY (instead of increasing both front & rear) has the effect of "tilting" the vehicle back just a bit. That slows down your steering, as well as changing the look of the vehicle.

Because the difference in RADIUS in your case is only 1/2" (1/2 the difference in wheel diameter), and the wheelbase is 116", this particular change is pretty small.

This is also less serious than DEcreasing the diameter of the front wheels versus the back. That would QUICKEN steering, which, taken to an extreme, makes things exciting.

Jim G
 

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Discussion Starter #4
! ?

for ghostrider: I selected eagle HP ultraplus. they come in 295 40 20 (rear size) and 255 35 20 to replace the front. goodyears specs say outside diameter is 27"on both these and the original 255 45 19, so in theory all you change is the side wall height. I ordered them through a friend at big-o, but right now both the RSA's and HP ultra plus have special pricing at tirerack. the RSA's are good all-around tires- I'm saving them for winter, the HP ultraplus are summer tires and last longer! :thumbs
to jim g: does the rim diameter change the geometry as you are saying, or is it the overall tire diameter? I'm hoping to keep the feel of black beauty about the same. another friend works at a go-krazy tire & wheel shop, he was pushing the bling-bling lowpro look. thats fine if you don't drive the truck for work everyday like I do, but thats the fun part! the pic's from yesterday at one of my stops.
I would still like to see a pic or 2, the only one I've seen is at newstalgiawheels website. its the 18-20 (big&little) look and really small. I was afraid there were alot of ssRs with this set-up because of boyds ssR fitment package but I decided since I've only seen 4 ssRs on the road it was a stupid concern.
thanks for the replies! :flag
 

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Mikepowell: The answer is that it is the change in RADIUS, not the diameter, of the TIRE that changes the geometry of your chassis.

I should have pointed out that distinction. I had incorrectly assumed that the tires that would be used with the larger diameter wheels would be similar in profile section to the tires used on the original wheels. As you r posting reminded me, that is not necessarily true. Although the choice in tire profile is not huge, it does exist.

The reason that it is the RADIUS, and not diameter, that is important, is that it is the difference in radius that creates the difference in AXLE height, which in turn creates the difference in chassis ANGLE.

It is the difference in ANGLE of the chassis that causes a change in the steering geometry.

Yes, radius is proportional to diameter, but is only HALF the diameter, so that the difference in axle height created by a 1 inch difference in diameter is only HALF an inch. The steering geometry is unaffected by the OTHER extra half inch of height of tire height within the wheel well!

Jim G
 

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gotta like that good ole boy thankin.
 

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Discussion Starter #8
thanks, Jim!

:thumbs I wasn't sure if I was missing something or if you thought I was changing the dia- I mean radius of the tire. I sorta understood the alignment lesson you were giving me in the first post. with the follow-up I get it well, all the adverse effects of big tires is what I want to avoid.
I'm still hoping for pic's of someones ride sporting smoothies...
:flag
 

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I'm not cool...
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Discussion Starter #9
no smoothies out there?

:confused i figured some of us would have these rims! I was at the autorama in january and saw about 2doz. pairs on the entrants, it almost steered me away from them. hmmm...
krazy :flag
 
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