Tire diameter and rear gears?

04-03-2001, 04:54 AM

Guys Im running 15X10s on the rear with 285/60 27.7inch DOTs on them and stock rear gears.Im wanting to go with P305/60s that are 29.3 inches tall what rear gear should I go with to keep the same Ratio Im running now.4.30s 4.56s or what.Oh and what is the stock size tire 30inches tall?Thanks guys.

------------------
Marcus Harrison
95Lightning
TeamPowerdyne
NLOC#495

04-03-2001, 05:59 AM

stock tires are 30in tall. id say that you would be closer to 430 than 456. go to sn95.com. they have all kinds of gearhead formulas including effective gear ratio. later paul.

04-03-2001, 10:19 AM

Ooo! Ooo! Ooo! MATH!

It's a linear relationship, so it would be 0(larger tire diameter/smaller tire diameter) * smaller tire ratio = larger tire ratio.

So, (29.3/27.7)*4.10 = 4.34. Therefore, 4.30s.

I'm such a nerd.

------------------
Later!
Jeff S.
President, NLOC

#74 in '95 - 11.92@115.2
#582 in '00 - 13.36@101.75 (Swanson chip ONLY)

04-03-2001, 10:39 AM

Like, who didn't know that formula?

------------------
Sam Sells NLOC#617
Powerdyned
'95 #1325
13.555@101.38

www.zing.com/album/?id=4293572361

04-03-2001, 11:34 AM

I think I slept through that part of class... in the dorm, not class.

John

04-03-2001, 01:13 PM

Thanks Jeff LOL.

04-03-2001, 01:16 PM

Yeah but what's the derivative???

------------------
Curt
'93 Red Lightning #4232
http://www.geocities.com/lightning_struck93/index.html

04-03-2001, 03:58 PM

Quote:

<font face="Verdana, Arial" size="2">Originally posted by Lightning Struck:
Yeah but what's the derivative???

</font>

Forget the derivative.....how about some diffy-q?!?

Still having nightmares over that!

Later,

------------------
- Kevin
Black '94 #907

04-03-2001, 04:54 AM	#1 (permalink)
Litng1 Guest Posts: n/a View this user's gallery iTrader: / %	Tire diameter and rear gears? Guys Im running 15X10s on the rear with 285/60 27.7inch DOTs on them and stock rear gears.Im wanting to go with P305/60s that are 29.3 inches tall what rear gear should I go with to keep the same Ratio Im running now.4.30s 4.56s or what.Oh and what is the stock size tire 30inches tall?Thanks guys. ------------------ Marcus Harrison 95Lightning TeamPowerdyne NLOC#495

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04-03-2001, 05:59 AM	#2 (permalink)
LIGHTNING2FAST Guest Posts: n/a View this user's gallery iTrader: / %	stock tires are 30in tall. id say that you would be closer to 430 than 456. go to sn95.com. they have all kinds of gearhead formulas including effective gear ratio. later paul.

04-03-2001, 10:19 AM	#3 (permalink)
Jeff S Guest Posts: n/a View this user's gallery iTrader: / %	Ooo! Ooo! Ooo! MATH! It's a linear relationship, so it would be 0(larger tire diameter/smaller tire diameter) * smaller tire ratio = larger tire ratio. So, (29.3/27.7)4.10 = 4.34. Therefore, 4.30s. I'm such a nerd. ------------------ Later! Jeff S. President, NLOC #74 in '95 - 11.92@115.2* #582 in '00 - 13.36@101.75 (Swanson chip ONLY)

04-03-2001, 10:39 AM	#4 (permalink)
Litl Sam Guest Posts: n/a View this user's gallery iTrader: / %	Like, who didn't know that formula? ------------------ Sam Sells NLOC#617 Powerdyned '95 #1325 13.555@101.38 www.zing.com/album/?id=4293572361

04-03-2001, 11:34 AM	#5 (permalink)
TraumaPirate Guest Posts: n/a View this user's gallery iTrader: / %	I think I slept through that part of class... in the dorm, not class. John

04-03-2001, 01:13 PM	#6 (permalink)
Litng1 Guest Posts: n/a View this user's gallery iTrader: / %	Thanks Jeff LOL.

04-03-2001, 01:16 PM	#7 (permalink)
Lightning Struck Guest Posts: n/a View this user's gallery iTrader: / %	Yeah but what's the derivative??? ------------------ Curt '93 Red Lightning #4232 http://www.geocities.com/lightning_struck93/index.html