2CV67 wrote:This thread is proving invaluable!
I still find it hard to accept Shimano getting this so wrong!
Will they correct it soon?
I don't see how they can correct it now. They can't redesign the hub overnight and they can't change their stated minimum ratio without losing credibility. I will be running mine at 1.8 with a 26 inch wheel and am not at all concerned given that:
1 The 1.9 recommendation will have a big safety factor built in
2 Shimano must be expecting lots of people to use lower ratios and would not risk this if they expected failures as a result.
3 They are probably just covering themselves against too many claims
4 Shimano have no way of establishing what ratio a broken hub has been subjected to
5 The range of rider weights / power outputs is vast and I'm definitely on the low end of the range
On another forum there are posts (which I can't find now) from some superman desert racer who raced down the Baja Peninsula with an Alfine 8 and a very low MTB drive ratio with no problems at all. I can't imagine a harsher environment except possibly a tandem.
The interesting question is, what compromise forced Shimano to come up with the 1.9 advisory and thereby potentially lose a slice of the market? Leaving aside the possibility that the marketing department left it up to the engineers (surely not), why didn't they beef it up a bit? Was it perhaps the constraint of trying to keep it the same size as the 8-speed? Or just cost? Weight maybe?
I'm just waiting for my hub to arrive from Germany and as soon as it's here I will be swapping it for the 8-speed that came with my Dahon Cadenza. This will be my first wheel build so hub failure will not be my main worry! I'll be very light on the pedals for the first few miles.
Incidentally, I seem to have accidentally bought two 11-speed shifters (complicated, don't ask), so if anyone wants to buy one off me...