RPM to MPH Chart

[pete.triumph]

• Here is a useful link for comparing different tyres size
• 
  
• Metric (TRX) Tires Information Section

U.S. (English) Tires Comparison Section.


U.S. (English) Tires Comparison Section
Original Equipment Tire After Market Tire
Side Wall Height (inch): Side Wall Height (inch):
Width (inch): Width (inch):
Diameter (inch): Diameter (inch):
Tire + Wheel Radius (inch): Tire + Wheel Radius (inch):
Circum. (inch): Circum. (inch):
% Diff:
Revs per mile: Revs per mile:
Revs per km: Revs per km:
Speedo Reading: New Speedo Reading:
New Speedo Reading = The speed the car will need to go (with the after market tires on) to be traveling at the same speed if the car had the orginal tires on.

 

[Bedifferent]

FYI....Just in case anyone is interested, I have created a chart for the RPMs at a given MPH. I have based this chart on the information members have provided me in this thread as well as others. The most accurate post I found indicated 2500 RPM at 62 MPH as indicated by a GPS. I have found GPS speed to be very accurate. so using those numbers I came up with the formula ...RPM = MPH/.0248. This appears to be the closest to the actual RPM for a given speed. Thanks everyone for all the input.

 

[Steel]

Gear Speed Data Entry
Original Equipment Tire Specifications
Tire Width in (mm):
Aspect Ratio:
Rim Diameter in (inch):
Transmission Gear Ratio:
Differential Ratio:
To calculate the speed click the Show Speed button. The results of the calculations appear in the Gear Speed Results.


Gear Speed Results
Engine Speed (RPM) Speed (KP/H) in backets is bridgstone 240/55 16
rpm---------1ST----------2ND-----------3RD----------4TH-----------5TH
8000 ---107-(111)---160-(166)---218-(226)---269-(279)---324-(336)--PONTERS
7000-----93-(97)-----140-(146)---190-(198)---236-(244)---283 (294) ME
6500-----87-(90)-----130-(135)----177-(183)---219-(227)---263 (273) STOCK
1000-----13-(14)------20-(21)-------27-(28)-----34-(35)------40 (42)

I took the liberty of converting it to MPH for us Yanks.

Gear Speed Results
Engine Speed (RPM)Speed (MPH) in backets is bridgstone 240/55 16
rpm---------1ST----------2ND-----------3RD----------4TH-----------5TH
8000 ---66-(69)---99-(103)---135-(140)---167-(173)---201-(209)--PONTERS
7000-----58-(60)-----87-(91)---118-(123)---147-(152)---176 (183) ME
6500-----54-(56)-----81-(84)----110-(114)---136-(141)---163 (170) STOCK
1000-----8-(9)------12-(13)-------17-(17)-----21-(22)------25 -(26)