Improvement in the use of gears; why 1 x 10 (or 11 makes sense)?

Wheels of Happiness

Rizal Philippines
June 23, 2016

I notice in my ride yesterday to Bosoboso that I used only one chain ring - the 42 and only shifted the lowest gear to 32 even if I was climbing Antipolo or Boso boso.    With 32 cogs, the gear inches is 35.4

Thus it makes sense really have 1 x 10 or 1 x 11 set up.

Thus if I have a  1 x 10  set up the gear inches for a 38  or 32 chain ring would have the following gear inches:

                                 32                        38

11                             75,63                   93.27

13                             64                         83.07

15                             55.46                    71.99

17                            48.94                     60.22

19                             43.78                     54

21                             39.61                     48.88

24                             33.28                      41.04

29                              28.68                     36.66

32                               26                        30.87

36                               23.11                    28.49

Thus if I use a 38 chain ring, the equivalent would be using 38 x 29  (36.66 gear inches)

For the my SARS bike which has 53 - 39 chain rings and 11 - 36 cogs,   that would be 53 x 36, or  39 x 28.   Wow.  I really have a strong hill climb capable road bike which I can depend on flats ( (the 53 chain ring has 130 gear inches which they say can do 53 kph at 100 rpm)