How small of a steering wheel can you use before the wheel starts blocking the tach and speedo? I realize this is somewhat related to how tall the driver is, of course.

Yes, I searched, but could not find what I was looking for. Thanks in advance.

 

search in the interior/exterior section.

it depends on the wheel and how tall you sit in the seat. the sparco mugello works well for me at 330mm, but others might prefer a standard 350mm wheel. stock is 380mm. the sparco blocks the chrome ring at the top of the tach, but i can still see the tach numbers perfectly.

 

I got a momo race sw, 13.5" i believe and it fits like a glove. It actually gave me a better, unobstructed view of the road. As far as the gauges go, it doesnt block anything. Before i bought it, i thought a smaller one would be better but this one seems almost perfect...
There are however 2 things you will need to know. Number 1 is that if you got big hands/fingers you might want to spring for the extension kit for the hub adapter, otherwise youre going to be hitting the turn signal/wiper switch whenever you turn. Nuber 2 is a bit more of a reduced diameter issue, its the sensitivity you get at speed(think 120mph+). gotta be a bit gentle!
Hope this helps,
Manny