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FixedGearFever FAQ (Frequently Asked Questions)



Category: Main -> Gear Charts/gearchart.htm

Question
·  How long will a lap take at 24 mph?
·  In a 90 inch gear what is my leg speed at 30mph and at 35 mph
·  What gear is a little bigger than a 48x14?
·  What size gear is a 48x14?

Answer
·  How long will a lap take at 24 mph?

This should help you figure it out! All of the times are in seconds!

     
   KPH     MPH   1k Time 250 Lap 333 Lap 400 Lap
   29     18.1    2:04   31.03   41.38   49.66
   30     18.8    2:00   30.00   40.00   48.00
   31     19.4    1:56   29.03   38.71   46.45
   32     20.0    1:53   28.13   37.50   45.00
   33     20.6    1:49   27.27   36.36   43.64
   34     21.3    1:46   26.47   35.29   42.35
   35     21.9    1:43   25.71   34.29   41.14
   36     22.5    1:40   25.00   33.33   40.00
   37     23.1    1:37   24.32   32.43   38.92
   38     23.8    1:35   23.68   31.58   37.89
   39     24.4    1:32   23.08   30.77   36.92
   40     25.0    1:30   22.50   30.00   36.00
   41     25.6    1:28   21.95   29.27   35.12
   42     26.3    1:26   21.43   28.57   34.29
   43     26.9    1:24   20.93   27.91   33.49
   44     27.5    1:22   20.45   27.27   32.73
   45     28.1    1:20   20.00   26.67   32.00
   46     28.8    1:18   19.57   26.09   31.30
   47     29.4    1:17   19.15   25.53   30.64
   48     30.0    1:15   18.75   25.00   30.00
   49     30.6    1:13   18.37   24.49   29.39
   50     31.3    1:12   18.00   24.00   28.80
   51     31.9    1:11   17.65   23.53   28.24
   52     32.5    1:09   17.31   23.08   27.69
   53     33.1    1:08   16.98   22.64   27.17
   54     33.8    1:07   16.67   22.22   26.67
   55     34.4    1:05   16.36   21.82   26.18
   56     35.0    1:04   16.07   21.43   25.71
   57     35.6    1:03   15.79   21.05   25.26
   58     36.3    1:02   15.52   20.69   24.83
   59     36.9    1:01   15.25   20.34   24.41
   60     37.5    1:00   15.00   20.00   24.00
   61     38.1    0:59   14.75   19.67   23.61
   62     38.8    0:58   14.52   19.35   23.23
   63     39.4    0:57   14.29   19.05   22.86
   64     40.0    0:56   14.06   18.75   22.50
   65     40.6    0:55   13.85   18.46   22.15
   66     41.3    0:55   13.64   18.18   21.82
   67     41.9    0:54   13.43   17.91   21.49
   68     42.5    0:53   13.24   17.65   21.18
   69     43.1    0:52   13.04   17.39   20.87
   70     43.8    0:51   12.86   17.14   20.57
      
      

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·  In a 90 inch gear what is my leg speed at 30mph and at 35 mph

While we could tell you, it would be easier to check out the Gear and Speed Spreadsheet in the downloads section!

Doing this saves us a lot of typing!

-fgf

[ Back to Top ]

·  What gear is a little bigger than a 48x14?

I believe the chart below will help you out!

  Ring    Cog      Gear        
   56      13      116.3    
   55      13      114.2    
   54      13      112.2    
   53      13      110.1    
   52      13      108.0    
   56      14      108.0    
   55      14      106.1    
   51      13      105.9    
   54      14      104.1    
   50      13      103.8    
   53      14      102.2    
   49      13      101.8    
   56      15      100.8    
   52      14      100.3    
   48      13      99.7     
   55      15      99.0     
   51      14      98.4     
   47      13      97.6     
   54      15      97.2     
   50      14      96.4     
   46      13      95.5     
   53      15      95.4     
   49      14      94.5     
   56      16      94.5     
   52      15      93.6     
   45      13      93.5     
   55      16      92.8     
   48      14      92.6     
   51      15      91.8     
   44      13      91.4     
   54      16      91.1     
   47      14      90.6     
   50      15      90.0     
   53      16      89.4     
   46      14      88.7     
   49      15      88.2     
   52      16      87.8     
   45      14      86.8     
   48      15      86.4     
   51      16      86.1     
   44      14      84.9     
   47      15      84.6     
   50      16      84.4     
   46      15      82.8     
   49      16      82.7     
   45      15      81.0     
   48      16      81.0     
   47      16      79.3     
   44      15      79.2     
   46      16      77.6     
   45      16      75.9     
   44      16      74.3     
      

[ Back to Top ]

·  What size gear is a 48x14?

Here is a pretty full gear chart! (based on a 27" wheel)

 	 38	 39	 40	 41	 42	 43	 44
12	85.5	87.8	90.0	92.3	94.5	96.8	99.0
13	78.9	81.0	83.1	85.2	87.2	89.3	91.4
14	73.3	75.2	77.1	79.1	81.0	82.9	84.9
15	68.4	70.2	72.0	73.8	75.6	77.4	79.2
16	64.1	65.8	67.5	69.2	70.9	72.6	74.3
17	60.4	61.9	63.5	65.1	66.7	68.3	69.9
18	57.0	58.5	60.0	61.5	63.0	64.5	66.0
19	54.0	55.4	56.8	58.3	59.7	61.1	62.5
20	51.3	52.7	54.0	55.4	56.7	58.1	59.4

	 45	 46	 47	 48	 49	 50	 51
12	101.3	103.5	105.8	108.0	110.3	112.5	114.8
13	93.5	95.5	97.6	99.7	101.8	103.8	105.9
14	86.8	88.7	90.6	92.6	94.5	96.4	98.4
15	81.0	82.8	84.6	86.4	88.2	90.0	91.8
16	75.9	77.6	79.3	81.0	82.7	84.4	86.1
17	71.5	73.1	74.6	76.2	77.8	79.4	81.0
18	67.5	69.0	70.5	72.0	73.5	75.0	76.5
19	63.9	65.4	66.8	68.2	69.6	71.1	72.5
20	60.8	62.1	63.5	64.8	66.2	67.5	68.9

	 52	 53	 54	 55	 56	 57	 58
12	117.0	119.3	121.5	123.8	126.0	128.3	130.5
13	108.0	110.1	112.2	114.2	116.3	118.4	120.5
14	100.3	102.2	104.1	106.1	108.0	109.9	111.9
15	93.6	95.4	97.2	99.0	100.8	102.6	104.4
16	87.8	89.4	91.1	92.8	94.5	96.2	97.9
17	82.6	84.2	85.8	87.4	88.9	90.5	92.1
18	78.0	79.5	81.0	82.5	84.0	85.5	87.0
19	73.9	75.3	76.7	78.2	79.6	81.0	82.4
20	70.2	71.6	72.9	74.3	75.6	77.0	78.3
Click here for quick printable copy!

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