NINER ENCYCLOPEDIA
>>
SPECIFICATION & SETUP GUIDE
48
: Updated: SEPT 5, 2012
SINGLESPEED GEARING INFORMATION
We have designed our singlespeed compatible bikes to accept tires as
large as 2.35” (actual measurement, not “claimed”, some manufacturers
2.55” tires will fit with plenty of mud clearance). Because of this there is
limited room between the chainring and rear chainstay and some larger
chainrings will contact the chainstay.
CAUTION! We highly recommend using a 32 tooth front chainring for SS
application. A larger chainring could contact the chainstays in certain
EBB positions and could cause damage.
Most singlespeed setups requires that the front chainring be in the middle
chainring position to maximize chainline. You can use a larger chainring if
you mount it in the large chainring position on your cranks, however, this
may cause chainline issues with some SS setups, specifically thread-on
style freewheels.
On the facing page are gear ratio charts to help you find a chainring/cog
combination that will mimic your current setup.
26 INCH GEAR RATIOS
CHAINRING SIZE
C
OG
SIZE
29
30
32
34
36
14
53.86
55.71
59.43
63.14
66.86
15
50.27
52.00
55.47
58.93
62.40
16
47.13
48.75
52.00
55.25
58.50
17
44.35
45.88
48.94
52.00
55.06
18
41.89
43.33
46.22
49.11
52.00
19
39.68
41.05
43.79
46.53
49.26
20
37.70
39.00
41.60
44.20
46.80
21
35.90
37.14
39.62
42.10
44.57
22
34.27
35.45
37.82
40.18
42.55
29 INCH GEAR RATIOS
CHAINRING SIZE
C
OG
SIZE
29
30
32
34
36
16
52.56
54.38
58.00
61.63
65.25
17
49.47
51.18
54.59
58.00
61.41
18
46.72
48.33
51.56
54.78
58.00
19
44.26
45.79
48.84
51.89
54.95
20
42.05
43.50
46.40
49.30
52.20
21
40.05
41.43
44.19
46.95
49.71
22
38.23
39.55
42.18
44.82
47.45
23
36.57
37.83
40.35
42.87
45.39
24
35.04
36.25
38.67
41.08
43.50
As an example, if you have a 32t chainring and 17t cog on a 26” bike,
you will want to run a 32t chainring and 19t cog on your new Niner in
order to have a very similar gear ratio with 29” wheels.
