Originally Posted by
HGR3inOK
... My understanding is that the shift sequence on current models is:
L R
1 1 First
2 1 Second
1 2 Third
2 2 Fourth
1 3 Fifth
2 3 Sixth
This looks right. If you number L positions as 1, 2, and number R position as 0, 2, 4, then the sum of the two gives you the gear number.
Here is the official gearing table (OP, notice that you have 3 options for 6SP order)
http://support.brompton.co.uk/entrie...ges-and-ratios