Ideally, axle tubes should sit flush with the wheel faces. If they’re too long, you can trim them back to reduce slack, but don’t cut past that point or the wheels will bind once the end pins are installed.
This product would be a great fit for model car collectors who seek high-quality, customizable diecast wheel and rubber tire sets for their PREMIUM w/ DISK BRAKES (P) 1:64 scale model vehicles.