• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

Rear Gearing, Tire Diameter and RPM's

  • Thread starter Thread starter 65 fastback
  • Start date Start date Jul 5, 2007

65 fastback

Founding Member
Mar 17, 2002
1,347
0
37
Northern VA
Jul 5, 2007
#1
  • Jul 5, 2007
  • #1
Does anyone know the formula for figuring RPM's based on Rear Gear Ratio and Tire Diameter?

Isn't there an online calculator somewhere?

Tim
 
G

Gud T.B. Blown

Member
Dec 9, 2004
583
1
18
Jul 5, 2007
#2
  • Jul 5, 2007
  • #2
65 fastback said:
Does anyone know the formula for figuring RPM's based on Rear Gear Ratio and Tire Diameter?

Isn't there an online calculator somewhere?

Tim
Click to expand...


Here are two: http://www.et-studios.com/motorsports/gears/gears.html
http://mysite.verizon.net/janvdb/vw/Transmission/speed-ratio.html
 

65 fastback

Founding Member
Mar 17, 2002
1,347
0
37
Northern VA
Jul 5, 2007
#3
  • Jul 5, 2007
  • #3
pushrod power said:
Here are two: http://www.et-studios.com/motorsports/gears/gears.html
http://mysite.verizon.net/janvdb/vw/Transmission/speed-ratio.html
Click to expand...

Thanks pushrod.

Tim
 

ultrastang

Founding Member
Feb 26, 2002
1,092
2
37
Arkansas
Jul 5, 2007
#4
  • Jul 5, 2007
  • #4
http://www.ultrastang.com/Rearinfo.asp?Page_ID=3
 
You must log in or register to reply here.

Similar threads

Drivetrain 5th Gear Ratio
  • PonyGTrider
  • Dec 8, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
33
Views
1K
Fox 5.0 Mustang Tech Dec 31, 2025
Qtrhrse23
Q
Fox Xtremely high fuel consumption
  • PonyGTrider
  • Apr 11, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 9 10 11
Replies
213
Views
4K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 9, 2026
PonyGTrider
C
Suggestions for rear diff gears - 1969 Mach 351W 4v
  • cfauvel
  • Apr 8, 2024
  • Classic Mustang Specific Tech
Replies
10
Views
2K
Classic Mustang Specific Tech Jun 27, 2024
cfauvel
C
B
Rear quarter window regulator
  • BADAZZOMBIE08
  • Mar 29, 2026
  • 2005 - 2009 Specific Tech
Replies
0
Views
127
2005 - 2009 Specific Tech Mar 29, 2026
BADAZZOMBIE08
B
T
Newbie looking for some info on speedo gears
  • TDM389
  • Nov 15, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
3
Views
241
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Nov 16, 2025
TDM389
T
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?