Originally Posted by
fietsbob
you don't need that 11 or a 12 , a 13/48 should be high enough..
Cross Racers , on the turf, are commonly using 46 and 44t outer chainrings ,
so they are on sale.
then maybe the 12-27 cassette is practical, again.
myself 90 is plenty high a GI size.
The 11-32 allows me to stay on the middle 36t ring 99% of the time (I actually use most of those), but maybe I could put the 12-25 again now that my bike is back to commuting duty. (summer tour is over) The 48t can be matched with an 11, 12, 14, and 16...So I guess today I used 48/16 for 79.1 GI and 48/14 for 90.4 GI. Incidentally, 79.1 GI is what 36/12 gets me. 36/11 GI gets 86.3.
I agree that 90 GI is good enough, I like getting up that high for some speed, but then I can only get down to 79.1 while still on the 48t. I wish I could reach up to the 90 and still have the option of getting below 80 GI.
Because the 11 and 12 are not practical and I can only use the 48/14 and 48/16, I can pretty much only toggle between 90.4 and 79.1. Great for speed, but the elevation changes more than that. I'm surprised I'm the only one with this problem. The 11-32 cassette only introduced the 11 on the high end...I'm going to keep experimenting with the toggle 48t.