Tucson's Bicycle Rentals/Guided Tours Authority

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Bike Sizing

Bicycle Frame Size Charts

The following bike frame size charts and calculators give you a good starting point on what size bike will fit your body. Sizing a bicycle is not an exact science, so consider this a general guide. You still may want to get a professional fitting from your local bike shop when buying a bike. In order to use the charts, you should have your height and leg length measurements (in either inches or centimeters). You can navigate this guide using the links below:

Hardtail Mountain Bikes

For MTB Off-Road use it is important to have frame small enough to handle cornering in demanding terrain and give ability to climb well. If the bike would be used only for leisure cycling or city choose one size bigger frame for more comfort.

Rider Height Inside Leg Suggested Frame size
ft & inch cm inch +/- 1 cm +/- 2.5 inch cm
4.10+ 145 27 69 13 33
5.0+ 152 28 71 14 36
5.2+ 157 28 71 15 38
5.4+ 162 29 74 16 41
5.6+ 167 29 74 17 43
5.8+ 172 30 76 18 46
5.9+ 175 30 76 19 48
5.10+ 177 31 79 20 51
6.0+ 182 33 84 21 53
6.2+ 187 34 86 22 56
6.4+ 192 35 89 23 58

Full Suspension Mountain Bikes

Rider Height Inside Leg Suggested Frame size
ft & inch cm inch +/- 1 cm +/- 2.5 inch cm
5.4+ 162 29 74 16 41
5.6+ 167 29 74 17 43
5.8+ 172 30 76 18 46
5.9+ 175 30 76 19 48
5.10+ 177 31 79 20 51
6.0+ 182 33 84 20 51
6.2+ 187 34 86 21 53
6.4+ 192 35 89 22 56

Hybrid & Road Cruiser Bikes

Rider Height Inside Leg Suggested Frame size
ft & inch cm inch +/- 1 cm +/- 2.5 inch cm
5.0+ 152 28 71 15 38
5.2+ 157 28 71 16 41
5.4+ 162 29 74 17 43
5.6+ 167 29 74 18 46
5.8+ 172 30 76 19 48
5.9+ 175 30 76 20 51
5.10+ 177 31 79 21 53
6.0+ 182 33 84 22 56
6.2+ 187 34 86 23 58

Junior Bikes

Bikes with Stabilizers: are designed to give maximum stability while cycling. But it is not essential that the rider is able to reach the ground. However the rider must be able to to get on/off the bike safely.

Rider Age Inside Leg Suggested Size
Years Ins cm Frame Wheel
2 - 4 14 36 12"
3 - 5 16 41 14"
4 - 6 18 46 16"
5 - 8 20 51 11" 20"
5 - 8 21 53 12" 20"
5 - 8 22 56 13" 20"

Bikes without Stabilizers: This table is for finding proper size for junior who recently progressed from stabilizers. Bike is low enough for child to ensure solid footing on the floor. For more experienced children one size bigger frame recommended.

Rider Age Inside Leg Suggested Frame size
Years Ins cm Frame Wheel
4 - 6 19 48 16"
5 - 8 21 53 11" 20"
5 - 8 22 56 12" 20"
5 - 8 23 58 13" 20"
7 - 12 26 66 14" 24"
7 - 12 27 69 15" 24"