I've been working on a scale drawing of an F1 car and noticed a problem with the scale of the wheel rim diameter to tyre diameter. I had been using the front wheel from the following image as a placeholder. When I compared the tyre diameter to wheel rim diameter, it transpired that the wheel had a relative scale of around 16.5 inches, which is far to big for F1:
![Image](http://www.the-blueprints.com/blueprints-depot-restricted/cars/williams/williams_fw16_brazil_gp-22536.jpg)
I compared a few more images of wheels and tyres such as the following on the Mercedes W06. These both gave a wheel rim diameter of almost 14.2 inches:
![Image](http://images.adrivo.com/images/950/q_80/sw_adrivo/se_sutton/0646142.jpg)
![Image](http://www.formule1.nl/media/uploads/media_images/2015-02-03/racepictures_1422965503.19.jpg)
The following image of the Williams FW16 gave a wheel rim diameter of 14.8 inches:
![Image](http://www.wallpaperup.com/uploads/wallpapers/2013/08/17/134930/511c31c8f5987dfafe731833854b2d12.jpg)