I think most production bikes (bent) aim for around a 25" low gear. Re-gearing seems to be a pretty common modification, either adding a smaller granny ring or swapping a 'road' triple for a mountain triple.At one point I had a 17" low gear on my V-Rex but found although I could crawl up a 20% grade, I was doing wheelies with each pedal stroke. I could still climb with a more standard 30/32 combination, so that's what's on it now..