The goatleg tire guide illustrates dozens of LEGO tires by actual size, providing part numbers for Bricklink, Brick Owl, Rebrickable and LDraw. Line illustrations rendered from LDraw files clearly show the tread patterns and comparative sizes of tires.
The guide has 13 pages of illustrations and can be purchased as a digital PDF or print publication from Magcloud.
Printed editions are $5 and include a copy of the digital edition. The digital edition alone is $2. (To use the digital version on a device, set the zoom so the outline of the 2×4 brick on the cover matches an actual brick. To print the digital file yourself, print the first page and adjust the margins and zoom level in your printer settings.))