Quote:
Originally Posted by MrBasse
They don't fit. Harbor freight sells mostly 10" tires but they do have an 8 inch non marring tire that is red in color. However, the andymark tire isn't really 8 inches as it is a metric tire. The HF tire is a 4x2 hub, so a totally different standard of measurement.
In the past we mounted hubs and sprockets to the steel wheels, but they are heavy heavy heavy. We are currently printing hubs for our 8" non-marring tires and tubes.
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Well, the hubs for the 8 inch wheels are out of stock at AndyMark making this moot now.
I did pick up one of the red wheels from HF the other day and had a student take it apart yesterday. We also found one half of one of the AndyMark hubs and tried to fit in the red tire. It looks a bit small, probably due to it being made to a similar but different sizing standard so it is not clear if the AndyMark hubs would grip the tires properly. The red HF tire is also a bit wider (along the axis of the axle) so people who use it should beware if they are using the AndyMark wheel in their CAD. We are looking at alternatives now. Please let us know how the printed hubs work out for you, especially how they take abuse.
I know AndyMark running out of these wheels is a great inconvenience to many teams but I feel that if FRC is to be an introduction to the world of engineering, this supply issue is not a bad thing at all. A significant portion of my work supporting existing products in my day job consists of finding alternatives for components that we are having a hard time getting enough of or the supplier cannot deliver on time or the component has gone obsolete. Not finding a replacement part usually means that the production line stops and the money stops coming in.