Dear N Scale Modelers. Many of you many not be aware but Fox Valley Models also makes great Brass Insulated Replacement replacement wheel sets for most popular N Scale Trucks. Here is some close up images and a list below of the part numbers for ordering the Wheel Sets.
N Scale Brass Wheel Sets from Foxvalley Models

These are sample wheelsets to show the wheels and axles in detail. The
finished wheels will have both wheels blackened. Below are a few images to
show our wheels in different trucks.

Fox Valley Models Wheelsets (rear axle) in InterMountain truck with IRC metal wheelsets.

Fox Valley Models Wheels (front) in MT truck with MT low profile wheel.

Fox Valley Models Wheels (front) in Atlas truck with Atlas plastic wheel.
Notes:
First Two Digits = Wheel Size
Last Two Digits = Axle Length
Wheel Sets that end in Stock Number "01" = .540 axle - Fits Micro Trains Trucks
Wheel Sets that end in Stock Number "02" = .553 axle - Fits Intermountain Trucks
Wheel Sets that end in Stock Number "03" = .563 axle - Fits Intermountain Trucks