Pendolino wheels question

[Rana Temporia]

I don’t know if anyone knows the answer but I recently got two Hornby Pendolino motor bogies extremely cheaply and I want to swap the wheels with traction tyres for solid wheels to make them self propelled units. I think the bogies are X9711, they are the version with black rather than white gears.

I think the wheel sets on them are X9718 and I wondered if the X9704 wheels have the same diameter axles so that they could be swapped over?

If anyone knows the answer to this it’d be much appreciated. The motor bogies run extremely well and seem to have silly power magnets as they pick everything up around them.

[Going Spare]

The wheelsets in pack X9718M are 1 x tyred and 1 x non-tyred (as opposed to those in original pack X9718 which had 1 tyre on each wheelset) which avoids the uncertainty around axle diameters. While logic says they could well be the same, logic and Hornby do not always go hand-in-hand.