Disable component's velocity / motion blur.

Hi! I’ve got a car with wheels which, due to the linear nature of motion blur, looks bad at speed. I’ve used Epic’s radial motion blur solution and it looks good in theory (you get a variable for bluriness which I can drive from the car’s velocity). The problem is I want the wheel to look good when it’s moving slowly, so the wheel still needs to rotate. Ideally i’d want to make it so my wheel objects don’t contribute to the velocity pass has anyone worked out how to do this? Ideally there’d be a ‘disable motion blur’ tick box in the component’s settings page.

Thanks in advance!