Motorcycle luggage axle loading calculator

Calculate estimated front axle mass and estimated rear axle mass with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use estimated front axle mass and estimated rear axle mass to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Wheelbase (m)
1.5
Baseline front axle load (kg)
100
Baseline rear axle load (kg)
120
Luggage masses (kg)
10,15
Luggage positions behind front contact (m)
1.4,1.8
Estimated front axle mass (kg)
97.666667
Estimated rear axle mass (kg)
147.333333
Front axle unloading (kg, negative means added)
2.333333

Try another scenario

Wheelbase (m)
1.6500000000000001
Baseline front axle load (kg)
100
Baseline rear axle load (kg)
120
Luggage masses (kg)
10,15
Luggage positions behind front contact (m)
1.4,1.8
Estimated front axle mass (kg)
100.151515
Estimated rear axle mass (kg)
144.848485
Front axle unloading (kg, negative means added)
-0.151515
Calculation method

Calculation method

Estimated front axle mass (kg)

Rear added=sum(mass×position)/wheelbase; front added=totalAdded-rearAdded.

Estimated rear axle mass (kg)

Rear added=sum(mass×position)/wheelbase; front added=totalAdded-rearAdded.

Front axle unloading (kg, negative means added)

Rear added=sum(mass×position)/wheelbase; front added=totalAdded-rearAdded.

Symbols and units
a
Wheelbase (m)
b
Baseline front axle load (kg)
c
Baseline rear axle load (kg)
d
Luggage masses (kg)
e
Luggage positions behind front contact (m)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Calculation steps and notation

sum(list) adds all entries in the list.

Assumptions & limits

Assumptions & limits

  • Static motorcycle loading model only, no handling or load-rating approval. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Static motorcycle loading model only, no handling or load-rating approval.
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