Looks interesting. Seems the offerings are:
- 10-36
- 10-39
- 10-46
- 10-52
To get 50kph @ 90 rpm, requires a 44t front chain ring. That gives you a 60rpm low speed of: 9.3kph, 8.6kph, 7.3kph, 6.5kph. For comparison, a 34/34 @ 60rpm is 7.6kph, and a 30/34 @ 60rpm is 7.6kph. So the 10-46 and 10-52 cassettes, with the 44t chain ring, gives you about the same low end as a 34 or 30t double on an 11-34 respectively. At the fast end, 44t and 10t gives only 2kph slower than a 46 and 11. So 10-52 seems to have about the same range as a 46/30 double on an 11-34 cassette. But, at a cost of bigger jumps at the lower end.
I wonder what the chain life is like? Of course a product like this has the issue that spares are going to be rocking horse shit. You better hope it lasts your epic ride, cos you're unlikely to find someone able to fix it when on the road, let alone get the parts...
I wonder what the practical limit is on how many sprockets you can put in at the back. Esp as you're starting to need narrow hubs to take the extra cogs.
1x also always makes me wonder about the arguments regarding cross chaining...
I wonder how the big players will react.
J
