BSR is the .75, 1, 1.33, gear ratios of the AW3, S for standard ,
W is for Wider in the BWR .64,1, 1.57.
driver 9 spline 2 cog, rather than 3 spline 1 cog.

NIG design* is a bit different from the old AW, with its in between gears possibility.
your Blog link is missing that Fact.. BSR is all using that NIG Design..

* an engineering product of the English company ,
the new owners make only that for the 3 speeds..





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