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CATEYE URBAN WIRELESS
Quick Start Manual
Setting up the computer
ETRTO
Tire size
L (cm)
47-203 12x1.75 94
54-203 12x1.95 94
40-254 14x1.50 102
47-254 14x1.75 110
40-305 16x1.50 119
47-305 16x1.75 120
54-305 16x2.00 125
28-349 16x1-1/8 129
37-349 16x1-3/8 130
32-369 17x1-1/4 (369) 134
40-355 18x1.50 134
47-355 18x1.75 135
32-406 20x1.25 145
35-406 20x1.35 146
ETRTO
Tire size
L (cm)
40-406 20x1.50 149
47-406 20X1.75 152
50-406 20x1.95 157
28-451 20x1-1/8 155
37-451 20x1-3/8 162
37-501 22x1-3/8 177
40-501 22x1-1/2 179
47-507 24x1.75 189
50-507 24x2.00 193
54-507 24x2.125 197
25-520 24x1 (520) 175
24x3/4 Tubular 179
28-540 24x1-1/8 180
32-540 24x1-1/4 191
ETRTO
Tire size
L (cm)
25-559 26x1 (559) 191
32-559 26x1.25 195
37-559 26x1.40 201
40-559 26x1.50 201
47-559 26x1.75 202
50-559 26x1.95 205
54-559 26x2.10 207
57-559 26x2.125 207
58-559 26x2.35 208
75-559 26x3.00 217
28-590 26x1-1/8 197
37-590 26x1-3/8 207
37-584 26x1-1/2 210
650C Tubular 26x7/8 192
ETRTO
Tire size
L (cm)
20-571 650x20C 194
23-571 650x23C 194
25-571 650x25C 26x1 (571) 195
40-590 650x38A 213
40-584 650x38B 211
25-630 27x1 (630) 215
28-630 27x1-1/8 216
32-630 27x1-1/4 216
37-630 27x1-3/8 217
18-622 700x18C 207
19-622 700x19C 208
20-622 700x20C 209
23-622
700x23C 210
25-622 700x25C 211
ETRTO
Tire size
L (cm)
28-622 700x28C 214
30-622 700x30C 215
32-622 700x32C 216
700C Tubular 213
35-622 700x35C 217
38-622 700x38C 218
40-622 700x40C 220
42-622 700x42C 222
44-622 700x44C 224
45-622 700x45C 224
47-622 700x47C 227
54-622 29x2.1 229
60-622 29x2.3 233
Measure the tire circumference (L) of your bicycle
Adjust the tire pressure properly. With the rider’s weight applied on the bicycle,
roll the wheel one tire revolution with reference to a marker such as the valve, and
measure the travel distance on the ground.
Tire circumference reference table
L cm
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