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you know what's funny

Posted by: frank on 2002-11-15 16:52:31
Account #: 442

In Reply to: A study investigating the effective inertial weight of wheels. Warning: technical in nature. posted by Toy_Guy on 2002-11-15 12:38:48

people are very curious and critical of wheel weight

but hardly anyone asks what different brands of the same size tire weighs

funny, considering the tire typically weighs more than 25 lbs, in a 17 or 18 inch size

2000 S4 6 speed Santorin/Blue-Black
ABT
mtm catback/ Tanoga SS
Pirelli PZero's (not Rosso's)
Canuck lower grills/
"the Real Foglight mod"

Trust NO One

Real S4's have Alcantara

"if it's not Santorin, it's crrrap!" :P
Fvck PETA

Thread:

A study investigating the effective inertial weight of wheels. Warning: technical in nature. - Toy_Guy 2002-11-15 12:38:48 (8215 views)

Craig 0wnz j000!! - Xr8edS4 2002-11-16 08:09:26 (942 views)

I just edited my post to add some clarification. - Toy_Guy 2002-11-16 06:04:34 (830 views)

you know what's funny - frank 2002-11-15 16:52:31 (1085 views)

The only variable with a wheel is the weight (within a given size) - this is not the case with tires - Mirror|rorriM 2002-11-15 22:20:29 (1000 views)

Actually - squidix9 2002-11-16 21:43:13 (1568 views)

Those look mean ; ) - Singletrack 2002-11-17 16:25:40 (816 views)

That's what - squidix9 2002-11-18 05:37:05 (659 views)

That's a cool site, couldn't find the video though. - Singletrack 2002-11-18 07:17:19 (648 views)

Rat's - squidix9 2002-11-19 06:04:46 (623 views)

Yeah I saw the pics - totally nuts. How did you get into ice racing? - Singletrack 2002-11-19 06:59:43 (691 views)

I got into ice racing because - squidix9 2002-11-19 13:18:56 (733 views)

Very cool man, thanks for all the info : ) - Singletrack 2002-11-19 14:35:36 (495 views)

Other than being F*&^&!g cold winter is cool for racing - squidix9 2002-11-19 20:12:02 (548 views)

I looked into this. Toyo TS-1 is the lightest in a given size. Bridgestone S0-3 is real heavy. - PhoenixS4 2002-11-15 17:08:59 (1694 views)

And don;t forget, a 235 is about a pound heavier than a 225. - PhoenixS4 2002-11-15 17:39:23 (626 views)

but - BSOD 2002-11-15 17:07:09 (660 views)

Good point. I speced out my winter vs summer weight about a month ago and - Singletrack 2002-11-15 17:00:48 (790 views)

werd, and tires are cheaper than bling bling rims - frank 2002-11-15 17:02:27 (1247 views)

unless you're sensible... OZ SL's are light and well priced. - S4 from GT 2002-11-16 01:22:13 (934 views)

A little flawed on rotational inertia. You have to chop the wheel in a thin pizza slice... - Audiboy 2002-11-15 15:24:12 (1256 views)

I think that's what the modern world calls 'Calculus' ;-) - Mirror|rorriM 2002-11-15 22:16:30 (705 views)

woah...old man of the internet...aim# 9!?! and I though I;d been here a while - SwampGTI 2002-11-15 17:04:20 (710 views)

oops, nevermind, I just read George reply. - Audiboy 2002-11-15 15:26:39 (678 views)

Nice analysis ... - sj6spslvrS4sdn 2002-11-15 15:12:22 (642 views)

Sounds about right to me. I have always gone by 1lb unsprung equals around 3 times sprung. - Singletrack 2002-11-15 14:08:09 (613 views)

Is this in Engrish? - Ben AKA NUHuskyfan 2002-11-15 14:02:20 (582 views)

Don't forget the Moment of Inertia for the Brake rotors, etc... ;) - reefer_bob 2002-11-15 13:58:37 (802 views)

I think saving 16 lbs. on brake rotors felt like it saved me 19.2 lbs. based on this... - LCP 2002-11-15 15:34:14 (727 views)

I run - squidix9 2002-11-15 13:50:04 (749 views)

What size is the OZ forged wheel and what does it look like? - PhoenixS4 2002-11-15 14:08:55 (1086 views)

I've got a bunch of 15X7's and 15X8's - squidix9 2002-11-15 21:23:46 (988 views)

The analysis is valid for no loss of traction. A burnout has different dynamics. - Toy_Guy 2002-11-15 13:59:20 (574 views)

True, but my point is the ability to - squidix9 2002-11-15 21:19:23 (637 views)

OK!!! All fixed up with the sub/superscripts added in. - Toy_Guy 2002-11-15 13:44:17 (744 views)

You're a swell guy. =) - LCP 2002-11-15 15:21:38 (627 views)

I would stress in the beginning its a 10 lb reduction PER wheel/tire just to clarify - Stealth4 2002-11-15 13:34:39 (618 views)

So ultralight tires is where the smart money's at!! - RichmondS4 2002-11-15 13:28:41 (777 views)

so my effective weight loss, if i bought lighter wheels, doesn't justify my effective wallet burn. - Mr. Piggie(mike01s4) 2002-11-15 13:12:22 (821 views)

...and that's why manufacturers don't do it either... - LCP 2002-11-15 13:14:57 (832 views)

No - making the wheels *heavier* can aid fuel economy - Mirror|rorriM 2002-11-15 14:10:04 (766 views)

I think that's a stretch - stiles_s 2002-11-15 14:48:35 (652 views)

I know it's a stretch...it really depends on what the EPA uses for their test - Mirror|rorriM 2002-11-15 15:02:10 (564 views)

for mfg'ers, cost of a heavy/stong wheel << cost of a light/strong wheel - BSOD 2002-11-15 13:45:48 (729 views)

Please edit your post to include subscripts. It's permitted HTML. See Forum FAQ. - LCP 2002-11-15 12:56:39 (558 views)

why dont you do it :) - Stealth4 2002-11-15 13:15:25 (690 views)

Toy Guy did enough as it is! - Mr. Piggie(mike01s4) 2002-11-15 13:09:43 (637 views)

Thats close, but not quite right... - George @ BostonAudi 2002-11-15 12:55:16 (1013 views)

By pretending the mass was all at the radius of the wheel/tire, he gave the best case scenario - Mirror|rorriM 2002-11-15 14:05:19 (677 views)

Exactly, Jeff. I'm glad you follow the simple physics! - Toy_Guy 2002-11-15 14:15:39 (539 views)

I think the internet tuning business would die if we started scanning the books on our shelves :-) - Mirror|rorriM 2002-11-15 14:17:38 (543 views)

George, why don't you try reading my post in entirety before commenting? - Toy_Guy 2002-11-15 13:45:37 (633 views)

I read the entire post. Twice now... - George @ BostonAudi 2002-11-15 13:59:03 (731 views)

It's sound. - Mirror|rorriM 2002-11-15 14:16:11 (724 views)

Agree. I was thinking of acceleration and braking, not constant velocity when I posted above. - Audiboy 2002-11-15 15:33:13 (580 views)

The same math applies, regardless of acceleration - Mirror|rorriM 2002-11-15 22:22:48 (554 views)

Well, I'll back out in disagreement... - George @ BostonAudi 2002-11-15 14:29:56 (648 views)

Sorry, my terminology was misleading - Mirror|rorriM 2002-11-15 14:40:29 (604 views)

"how the car is driven" == AWD vs 2WD, not driver skill :) - George @ BostonAudi 2002-11-15 14:00:59 (1033 views)

That only affects dyno numbers, not the actual #s put down on the pavement - Mirror|rorriM 2002-11-15 14:11:18 (604 views)

george, he's calculating it as if all the weight was all the way - BiTurboBoy 2002-11-15 13:02:39 (775 views)

Right... I've always seen approx 4x equivalence... - George @ BostonAudi 2002-11-15 13:04:43 (781 views)

damn, engineering is hard to read without subscripts.... - BiTurboBoy 2002-11-15 12:45:02 (689 views)

You could be totally wrong and I would have no clue, but it sounds good =) - 2k2S4 2002-11-15 12:41:09 (557 views)

I read it on the internet.... ;-) - Mirror|rorriM 2002-11-15 14:18:17 (575 views)

It's not wrong, trust me :-) - Toy_Guy 2002-11-15 12:43:49 (642 views)

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