Tire size for a 25 7pass

Unknown

I am looking for the correct tire size for my 7pass Biddle and Smart

bodied 25.

I know they are 21" but what tread width?

Also looking for steering wheel wood sections, I have most of it but

need 2 spoke sections. Haven't figured out how to cut the finger joints

to make new ones, could do it by hand I guess, but will have different

color wood with out the aged look to it.

Also both spare tire mounting shoes.

While I am at it, I need some pics of MotoMeter's of that era or a

meter if anyone has one.

The few pictures I have are at;

http://www.hudsonterraplane.com/SuperSix/super_six.htm