Shimano Alivio RD-M3100 Rear Derailleur

Step 1 of 5: Why It's Important?

Choosing the correct frame size is crucial for your comfort and performance on the bike.

To find your correct frame size, you'll need a measuring tape, a book, and to stand next to a wall. We'll walk you through 5 easy steps that will only take 10 minutes.

Step 2 of 5: Measure Your Height

Stand straight next to a wall with your feet flat on the floor. Use a pencil to mark the top of your head on the wall. Measure the distance from the floor to the mark and enter into the below field.

Step 3 of 5: Measure Your Inseam

Stand against a wall with a book placed between your legs, touching your crotch. Mark the top of the book on the wall and measure the distance from the floor to the mark and enter into the below field.

Step 4 of 5: Confirm Your Measurements

Height: cm

Inseam: cm

Step 5 of 5: Your Frame Size

Your recommended frame size is:
If you don't see the recommended frame size listed, it could be because it's currently out of stock or we're not offering that specific size for this bike.