Originally Posted by
garysol1
Incorrect.... For instance the 11 speed 12-28 breaks down like this..... 12-13-14-15-16-17-19-21-23-25-28. Essentially it the same spread as a 10speed 12-25 (12, 13, 14, 15, 16, 17, 19, 21, 23, 25) plus a added climb gear. To me that is quite a bit broader.
Another way to look at it. What you lose to gain the 28 with the 10 speed.
Looking at a comparable 10 speed to get the 28 you need to go with.
11-12-13-14-14-15-17-18-21-24-28
You gain the 11, lose the 16 and split the difference between the 23 and 25 with a 24.
Assuming a 50/34 the 16 gives you gear inches of 82.1 and 55.8. You can get close to 55.8 with the 50/24 combo that comes in at 54.8. The gap is really the 82.1 that the 50/16 gave you. You can only get close if you are willing to cross chain and go with the 34-11 = 81.2. For most riders you would be looking at the 50/15 = 87.6 or the 50/17 =77.3
Looking at the 24 it gives you 54.8 and 37.2. While the 23 and 25 would have given you 35.8, 38.8, 52.6 and 57.1. I think most riders could live with the 24. Now the 10 speed does give you the 11. with the 11 cog ot get 119 compared to the max of 109 with the 12 but that would not come into play for a lot of riders, except for on the hills that they needed the 28 to get up.
But that missing 16 is really where you can see the benefit. This could be solved if you could get a 12-28 10 speed with the 16. But I don't think that animal exist.
I think you can get the 12-27 10 speed which may be enough.