# gearing - Excel

Document Sample

```					     A   B   C      D      E      F          G      H     I   J     K      L     M       N        O        P Q   R
1
2

3                                Gear Ratio Calculator
4
5                              For 27-inch wheels:                             For 26-inch wheels:
6                                 Chainrings                                      Chainrings
7                                     28      38     48                            22        32       42
8                Cogs 11              69      93    118           Cogs 12          48        69       91
9                         12          63      86    108                   13       44        64       84
10                        13          58      79    100                   14       41        59       78
11                        14          54      73     93                   15       38        55       73
12                        15          50      68     86                   17       34        49       64
13                        17          44      60     76                   19       30        44       57
14                        19          40      54     68                   21       27        40       52
15                        21          36      49     62                   23       25        36       47
16                        23          33      45     56                   26       22        32       42
17                        25          30      41     52                   32       18        26       34

18
All results rounded to the nearest whole number
19
20
Instructions: Simply replace the blue numbers with the actual numbers of teeth on
your chainrings and cogs (you might only have 7, 8, or 9); the table will show the gear
ratios for each chainring/cog combination on your bike.

21
24
25               What do the numbers mean? The higher the number, the harder that gear is to
26               pedal, and the lower, the easier. So, in the table above, the 118 gear ratio is the bike’s
27               hardest gear and the 30 is the easiest. Your goal is to have easy enough low gears to be
able to ride up the hills on your rides, hard enough high gears for achieving the speeds
you require (especially if you race), and jumps between the gears that work for your
fitness level. Racers like narrow jumps. Tourists like wider ones.
28
29                                         Questions? Email jim @ jimlangley.net

30

```
DOCUMENT INFO
Shared By:
Categories:
Stats:
 views: 10 posted: 6/23/2011 language: English pages: 1