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Old 03-16-2010, 12:52 AM   #151
Tony_SS
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Re: lowered shortbeds on stock wheels?

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Originally Posted by SCOTI View Post
But if the materials are different (15x8" steelie vs. 20x8" aluminum wheel) there is a mathmatical difference. To me that has to be calculated & not just assumed.
Yes, the mathematical difference is that the weight of the wheel (rotational mass) is moved out 2.5" further from the center. Even if the materials are different, it does not matter in regards to rotational mass and moment of inertia. Like the engineer said, its where the weight is.

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.. but since most wheels concentrate the bulk of their weight along the outside (the hoops that hold the tire), MOI calculated at the outside edge is a decent approximation.

Last edited by Tony_SS; 03-16-2010 at 12:55 AM.
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Old 03-16-2010, 09:10 AM   #152
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Re: lowered shortbeds on stock wheels?

Wow this is very informative. Thanks Scott, and Tony.

I don't know any facts or anything. However, on my old 94 Sierra after we installed the 20's I did notice a difference in accelerating from a stop. It wasn't anything signicant, but just enough you could tell a difference from the stock 15" wheels with the overall height being about the same.
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Old 07-12-2010, 01:50 PM   #153
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Re: lowered shortbeds on stock wheels?

lots of good tech. info here and love all the rallies too.
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Old 12-14-2011, 01:23 PM   #154
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Re: lowered shortbeds on stock wheels?

ttt
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Old 12-14-2011, 03:42 PM   #155
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Re: lowered shortbeds on stock wheels?

Here is my Red head!
8 in rallys.
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Old 12-14-2011, 05:45 PM   #156
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Re: lowered shortbeds on stock wheels?

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Stock wheels never go out of style...nice to see so many trucks with 'em....
Rarely do I like a truck with 20"+ wheels....

Here's my pile.....

I agree with ya (No offense to anyone who likes them..) and your truck looks awesome
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Old 12-20-2011, 02:29 PM   #157
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Re: lowered shortbeds on stock wheels?

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Here is my Red head!
8 in rallys.
Looks nice man!
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Old 12-20-2011, 02:33 PM   #158
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Re: lowered shortbeds on stock wheels?

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Looks nice man!
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many thanks John!
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Old 12-21-2011, 02:28 AM   #159
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Re: lowered shortbeds on stock wheels?

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Old 12-21-2011, 06:51 PM   #160
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Re: lowered shortbeds on stock wheels?

I love rallys. looks great
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Old 12-21-2011, 07:28 PM   #161
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Re: lowered shortbeds on stock wheels?

What the heck... I'll never pass up a chance to post pics of my '79 GMC. 15x8's up front, and 15x10's on the rear.


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Old 12-21-2011, 07:45 PM   #162
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Re: lowered shortbeds on stock wheels?

wow nice truck
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Old 12-21-2011, 07:47 PM   #163
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Re: lowered shortbeds on stock wheels?

Love that color combo on the 73-80 trucks! Looks sweet!
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Old 12-21-2011, 08:47 PM   #164
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Re: lowered shortbeds on stock wheels?

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wow nice truck
Thanks!
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Old 12-21-2011, 10:45 PM   #165
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Re: lowered shortbeds on stock wheels?

the blazer version
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Old 12-21-2011, 10:50 PM   #166
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Thumbs up Re: lowered shortbeds on stock wheels?

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the blazer version
NICE!
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Old 02-23-2012, 04:32 PM   #167
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Re: lowered shortbeds on stock wheels?

Just bought so dont be too hard on it yet lol.

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Old 02-23-2012, 04:43 PM   #168
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Re: lowered shortbeds on stock wheels?

That truck is beautiful, maxh. Don't change a thing (okay, maybe the mirrors)!
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Old 02-23-2012, 04:55 PM   #169
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Re: lowered shortbeds on stock wheels?

Needs a few changes... mudflap delete, new rear bumper, and Im thinking factory trim..
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Old 02-23-2012, 09:09 PM   #170
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Re: lowered shortbeds on stock wheels?

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Needs a few changes... mudflap delete, new rear bumper, and Im thinking factory trim..
you read my mind, btw nice trucks!
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Old 02-23-2012, 09:12 PM   #171
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Re: lowered shortbeds on stock wheels?

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Originally Posted by ymerej71 View Post
What the heck... I'll never pass up a chance to post pics of my '79 GMC. 15x8's up front, and 15x10's on the rear.


Whats the drop/tire size on this beauty?
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Old 02-26-2012, 02:00 PM   #172
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Re: lowered shortbeds on stock wheels?

Before the wheel upgrade, my 83
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Old 02-26-2012, 05:14 PM   #173
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Re: lowered shortbeds on stock wheels?

I dont think my dog likes my truck!Name:  user16097_pic1061_1227171498.jpg
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Old 02-26-2012, 05:34 PM   #174
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Re: lowered shortbeds on stock wheels?

My Mom bought one of those brand new back in the day!!! Gave it to me but I couldn't back it back to Hickory in time to stop me dad from saling it to someone who fled the country shortly after! Truck showed up at a Garage place who contacted them and stated if they payed the storage fees they could have it back! The truck is still at this place, I think!!!

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4/6 notched flipped 15x8 1" spacer
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Old 02-26-2012, 11:53 PM   #175
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Re: lowered shortbeds on stock wheels?

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not the best pic for this topic but the red & white one is lowered on rallys
[IMG][/IMG]
Anyone kno wheel size n drop of this yellow one
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