I currently riding a dual 26 inch homebuilt bike. Here's a picture:
http://photos1.blogger.com/hello/284/1537/1024/DSCF0065.jpg

I'm considering using dual 406 wheels instead of 26 inch wheels. If I
changeand use a 20 inch fork, would that change the steering geometry
even though I'd be using dual 406s?

Thanks

Sebastian