# Parts of In-Line Skates

Part of the Skating Merit Badge Digital Resource Guide: [Introduction & Overview](https://merit-badge.university/merit-badges/skating/guide/index.md)

*2. Option C — In-Line Skating*

> **2c2.** Describe the parts of an in-line skate and their functions.

An in-line skate has several distinct components, each affecting how the skate performs. Understanding each part helps you maintain skates, troubleshoot problems, and buy appropriate replacements.

### Parts and Functions

| Part | Function |
|------|----------|
| **Boot** | Encases and supports the foot; can be soft (like a shoe) or hard-shell; stiffness determines ankle support and control |
| **Liner** | The padded inner layer inside the hard shell that provides comfort and a custom fit |
| **Frame (chassis)** | The structural base attached to the boot sole that holds the wheels in a single-row alignment |
| **Wheels** | Polyurethane cylinders mounted in the frame; size (in mm) affects speed and maneuverability; hardness (durometer) affects grip vs. glide |
| **Bearings** | Two per wheel; precision ball bearings inside the wheel hub that allow the wheels to spin; rated by ABEC quality scale |
| **Axle bolts** | Hold each wheel to the frame; must be tightened to the correct torque for smooth spin without wobble |
| **Heel brake** | A replaceable rubber block mounted at the rear of the frame; dragging it on the ground creates friction to stop |
| **Buckles / laces / velcro closure** | Systems that secure the boot around the foot; many skates use a combination of laces at the toe and buckles at the ankle |
| **Cuff** | The upper section of the boot above the ankle; stiffness and height affect ankle stability and maneuverability |
| **Cuff buckle** | The closure at the cuff; allows precise tightening at the ankle independent of the foot |

### Types of In-Line Skates

**Recreational skates.** Soft or hard-shell boots with 3–5 wheels; designed for fitness skating and general use; usually include a heel brake.

**Aggressive/street skates.** Shorter frame, smaller harder wheels, and no heel brake; designed for tricks, grinds, and skate park use.

**Speed skates.** Longer frame with 5 wheels, very low boot for maximum ankle flexion; built purely for racing efficiency.

## Official Resources

Video: [Types and Parts of Inline Skates (video)](https://youtu.be/dKYpuWcZ_Ak)

---

- Previous: [In-Line Safety & Courtesy](https://merit-badge.university/merit-badges/skating/guide/req2c1/index.md)
- Next: [Required Safety Gear](https://merit-badge.university/merit-badges/skating/guide/req2c3/index.md)