Tire Calculator (Offset&Speed)

Category	Price	Seller	Device
Utilities	$0.99	Satoshi Mori	iPhone, iPad, iPod

Have you experienced worrying with matching when purchasing or diverting in an auction? This application calculates change amount with easy operation!

iPhone 4s to iPhone 8 and X compatible
Also optimized for iPad


[Function]
① Wheel offset calculation (select rim width and inset)
○Inner and outer rim position change amount (inch or mm)
○ Rim width change (inch or mm)
○ Change amount of tread (inch or mm)

② Speedometer ​​error calculation (Select tire size or directly input outer diameter)
Automatic calculation of tire outer diameter before and after replacement
○ Speed ​​error(%) Real speed to meter display
○ Actual speed at 40(mph or km/h) display
　*40 can be changed
○ Actual travel distance when traveling 10000 (mile or km) distance
○ Change in vehicle height (inch or mm)

③ Speedometer error measurement (GPS use)
Actually run the vehicle, compare the GPS measurement value with the speedometer and measure the error
* Results will cause errors depending on the measurement environment.


[Features]
○ Easy-to-understand screen design!
○ Simple and easy operation!
○ Speed ​​error can also be corrected on the vehicle side (It can also be OFF)


[Specification]
Settable range
○ Offset calculation
· Rim width 3.5 J to 16 J
· Inset (offset) (mm) -60 to +70

○ Speed ​​error calculation
· Tire width (mm) 155 to 405
· Profile (%) 20 to 85
· Wheel diameter (inch) 10 to 32
· Tire outer diameter direct input range 100 to 2000(mm) or 5-100(inch)
· Vehicle side error correction (%) -30 to +30

○ Speedometer error measurement
· Measurable speed (km / h or mph) 10 ~ 300


[Notes]
An error arises in the calculation result depending on the wheel brand and the brand of the tire. Be sure to consult experts before actually changing the specifications.
Application creator assumes absolutely no responsibility.