This is turning out more difficult than I had hoped.

Does anyone know where I can get replacement tires for the 2M Viperjet. The ones recommended by Erwin are 85mm but mine are 75mm and I want the same size. Despite several emails he hasn't (or won't) confirm that his 75mm tires fit the rims that I have (that were supplied by Tomahawk) which may or may not be Airtech.