THE WHEEL
STEP 1.

Create a New part and rename it Wheel.
STEP 2.
In Model Environment click on Revolve icon and on Front Plane sketch the profile as shown, then revolve it around vertical axis.

STEP 3.
Apply rounds:

STEP 4.
Add rubber appearance:

The Part looks like this:

THE RUBBER BUSH I
STEP 1.

Create a New part and rename it Rubber Bush 1.
STEP 2.
In Model Environment click on Revolve icon and on Front Plane sketch the profile as shown, then revolve it around vertical axis.

STEP 3.
Apply rounds:

STEP 4.
Add rubber appearance:

The Part looks like this:

THE RUBBER BUSH II
STEP 1.

Create a New part and rename it Rubber Bush 2.
STEP 2.
In Model Environment click on Revolve icon and on Front Plane sketch the profile as shown, then revolve it around vertical axis.

STEP 3.
Apply rounds:

STEP 4.
Add rubber appearance:

The Part looks like this:

THE PIVOT
STEP 1.

Create a New part and rename it Pivot.
STEP 2.
In Model Environment click on Extrude icon and on Top Plane sketch the profile as shown, then extrude it 10mm as solid :

STEP 3.
Click on Extrude icon and sketch a circle of Ø17mm on a flat surface and extrud it 2mm upwards.

STEP 4.
Apply round on the bottom

STEP 5.
Shell the part

STEP 6.
Apply rounds

STEP 7.
Add rubber appearance:

The Part looks like this:

This design work is also available as video version on my YouTube channel as embedded below:
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