Calculating The Wheel Size - Sigma ROX 5.0 User Manual

Basic settings
Setting the wheel size 1 and 2
www.sigmasport.com

4.3.1 Calculating the wheel size

There are three ways to determine the wheel size:
− Follow instructions in Figure A or B
− Find in the table (Figure C) based on tire size.
km/h:
WS = mm x 3.14
mph:
WS = mm x 3.14
mm x 3.14
Figure A
ETRTO
Tire Size
16 x 1.75 x 2 47-305
20 x 1.75 x 2 47-406
24 x 1 3/8A 37-540
24 x 1.75 x 2 47-507
26 x 1 23-571
26 x 1.5 40-559
26 x 1.6 44-559
26 x 1.75 x 2 47-559
26 x 1.9 50-559
26 x 1.95 52-559
26 x 2 54-559
26 x 2.1 56-559
26 x 2.125 57-559
26 x 1 3/8 37-590
26 x 1 3/8 x 1 1/2 37-584
26 x 3/4 20-571
27 x 1 1/4 32-630
27 x 1 1/4 Fifty 28-630
Figure C
ROX 5.0
km/h:
WS = mm
mph:
WS = mm
1x
Figure B
WS
Tire Size
mph
1272 27.5 x 2.0
1590 27.5 x 2.1
1948 27.5 x 2.2
1907 27.5 x 2.25
1973 28 x 1.5
2026 28 x 1.75
2051 28 x 1 1/2
2070 28 x 1 3/8 x 1 5/8
2089 29 x 2.0
2105 700 x 18C
2114 700 x 20C
2128 700 x 23C
2133 700 x 25C
2105 700 x 28C
2086 700 x 32C
1954 700 x 35C
2199 700 x 38C
2174 700 x 40C
ROX 5.0
= WS (mm)
ETRTO
WS
mph
54-584 2154
56-584 2170
58-584 2186
60-584 2194
40-622 2224
47-622 2268
40-635 2265
37-622 2205
54-622 2290
18-622 2102
20-622 2114
23-622 2133
25-622 2146
28-622 2159
32-622 2174
37-622 2205
38-622 2217
40-622 2224
Page 17