How to Size a Mountain Bike

Intermediate 5 min 12 steps 1659 views Rating: 3.8/5 Published: 2026-04-23

Know the guidelines.. Keep your positioning on the bike in mind.. Know how bikes vary.

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Steps

1

Know the guidelines.

Step 1

Know the guidelines.

2

Keep your positioning on the bike in mind.

Step 2

Keep your positioning on the bike in mind.

3

Know how bikes vary.

Step 3

Know how bikes vary.

4

Measure your inseam.

Step 4

Measure your inseam.

5

Measure your bike's seat tube, if applicable.

Step 5

Measure your bike's seat tube, if applicable.

6

Do the standover test.

Step 6

Do the standover test.

7

Find your ape index.

Step 7

Find your ape index.

8

To get specific, find your ideal top tube length.

Step 8

To get specific, find your ideal top tube length.

9

Adjust your seat height.

Step 9

Adjust your seat height.

10

Adjust the handlebars.

Step 10

Adjust the handlebars.

11

Adjust the seat tilt.

Step 11

Adjust the seat tilt.

12

Test the adjustment.

Step 12

Test the adjustment.

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