5th gear ratio 4.7?

[Adam_Winstone]

^... very true.

Adam

PS - For some reason I was thinking that it was running 4.7 on a 19 front, hence my comment about a 20 tooth, but it makes little difference as 20/46 would give us 4.6, the optional longer 5th would take it further again (with the close ratio starting point meaning that this will not result in much of a gap between 4 and 5, and 21 tooth fronts used to be fairly common, which is why Webbo lists them in his gearing charts (same box would result in 4.38 on 21/46).