1, 2. Substitute wheels machined from mild steel before and after fitting the delrin insulating bush.
The tyre profile is cut with a Gauge 3 form tool.
The bush is bored to 4.0 mm dia. which reduces slightly as it is pressed into the wheel.
3. Original MTH wheel with rubber traction tyre.
Other tyre tyre widths and profiles can be provided - Gauge One Fine, Standard or Scale 32 to suit other track standards.