F30s – SHAVED TO 8mm – probably not possible, the internal RIB channel inside the tire is 5mm wide, leaving 1.5mm on each side.
John is a crafty guy so maybe that *IS* possible ….
Some Tire and Wheel Ideas:
http://slot.it/wp-content/uploads/2020/02/A-parte-SLOT.IT_2020-_Slot_IT-POLICAR-accessories-REV-18-02-2020-OK-WEB.pdf
REAR TIRES
Slot.IT PT1088-C1 (8mm wide, 16.8 Dia/Tall; C1 compound)
https://www.nsrslot.it/assets/download/NSR%20catalogo%202021_web.pdf
NSR 8w X 17od Supergrip (shore-28?) NSR-5204; Ultragrip (shore-22?) NSR-5205
NSR 8w X 18od Supergrip NSR-5227; Ultra 5228
NSR 8w X 19.5od Supergrip NSR-5248; Ultra 5249
** Ultragrips ??may?? be Too-sticky for the Rally (not enough drift)
REAR WHEELS
Slot.IT W15808225A/WH1050-AL (8mm wide, 15.8 Rim Dia/Tall) Alloy/alum; 2.5mm Hub)
Slot.IT W15808215A/PA24-ALS (8mm wide, 15.8 Rim Dia/Tall) Alloy/alum; 1.5mm Hub)
Slot.IT W16508215A/PA43-ALS (8mm wide, 16.5 Rim Dia/Tall) Alloy/alum; 1.5mm Hub)
Slot.IT W17308215A/WH1110-AL (8mm wide, 17.3 Rim Dia/Tall) Alloy/alum; 1.5mm Hub)
Slot.IT W17308225A/WH1048-AL (8mm wide, 17.3 Rim Dia/Tall) Alloy/alum; 2.5mm Hub)
FRONT WHEELS
Slot.IT W14308015A/PA33-ALS (8mm wide, 14.3 Rim Dia/Tall) Alloy/alum; 1.5mm Hub)
FRONT TIRES
Slot.IT PT19/1096 (8mm wide, 14.2 Dia/Tall; Z1 ZERO-GRIP compound)
"... get on your bad motor scooter and ride!"
Sammy with Montrose