Slottolution slotcar chassis fits to the body of the Tamiya Porsche 911 / 993 GT2, for example item 24175.
18D motors fits: Motor diameter max. 25mm, flat-diameter max. 19mm, lenght max. 37mm, diameter flange max. 6,5mm, distance screws 11-13mm
For example: Slotdevil 4020, Johnson 20543 etc.
If you want to use a different motor, please have a look into my shop.
Distance between front- and rear-axle: 94,5mm
Height of the chassis is adjustable +/-2mm
Showed front wheels have outer diameter of 27 mm and width (all) 14mm
(Tamyia wheels of Kit 24175)
Showed rear wheels have outer diameter of 28mm and width (all) 16mm
(Ortmann 11B tyres with Sigma wheels)
For question please watch linked Youtube video or write me a mail.