Condition New
Indoor Cycle Pull Pin / Pop Pin – Black Adjustment Knob
M16 × 1.5 Thread | Available in 18mm, 20mm, 25mm & 27mm Pin Lengths
This M16 × 1.5 indoor cycle pull pin is designed for seat and handlebar adjustment systems found on commercial spin bikes, indoor cycles, and exercise bikes. The spring-loaded locking pin allows riders to quickly adjust seat height, handlebar height, and fore/aft positions while maintaining secure engagement during workouts.
Featuring an all-black ergonomic adjustment knob with molded directional graphics and commercial-grade construction, this replacement pull pin is ideal for fitness centers, cycling studios, hotels, apartment gyms, and home exercise bikes.
This listing includes four pin length options, allowing you to select the correct size for your bike.
📐 Available Sizes
| Part Number | Thread Size | Pin Diameter | Pin Length |
|---|---|---|---|
| #7686-18B | M16 × 1.5 | 8mm (5/16") | 18mm (0.71") |
| #7686-20B | M16 × 1.5 | 8mm (5/16") | 20mm (0.79") |
| #7686-25B | M16 × 1.5 | 8mm (5/16") | 25mm (0.98") |
| #7686-27B | M16 × 1.5 | 8mm (5/16") | 27mm (1.06") |
Common Dimensions
- Knob Diameter: 58mm (2.28")
- Thread Size: M16 × 1.5 Fine Pitch
- Pin Diameter: 8mm (5/16")
- Color: Black
🚴 Compatible Indoor Cycle Brands
Commonly found on select models from:
- Schwinn IC Series
- Star Trac Spinner Series
- Keiser M3 / M3i (verify dimensions)
- Stages Indoor Cycles
- Spirit Fitness Indoor Cycles
- BH Fitness Indoor Cycles
- SportsArt Indoor Cycles
- Endurance by Body-Solid Cycles
- XTERRA Fitness Bikes
- Sunny Health & Fitness Commercial Models
- Diamondback Fitness Bikes
- Various OEM spin bikes and indoor cycles
🔩 Key Features
Spring-Loaded Pop Pin Design
Allows quick seat and handlebar adjustments while maintaining secure locking engagement.
M16 × 1.5 Fine Thread
Provides secure installation and smooth operation.
Large Ergonomic Knob
Comfortable grip allows easy adjustments even during high-use commercial applications.
Commercial Grade Construction
Built to withstand repeated daily use in cycling studios and fitness facilities.
Multiple Length Options
Available in four pin lengths to fit a variety of indoor cycle adjustment systems.
🚴 Common Applications
- Seat height adjustment
- Seat fore/aft adjustment
- Handlebar height adjustment
- Handlebar fore/aft adjustment
- Indoor cycle frame positioning systems
- Commercial spin bike maintenance and repair
📏 How to Choose the Correct Size
Step 1 – Verify Thread Size
Confirm your bike uses:
M16 × 1.5 Thread
Step 2 – Measure Pin Extension Length
Available options:
- 18mm (0.71")
- 20mm (0.79")
- 25mm (0.98")
- 27mm (1.06")
Step 3 – Verify Pin Diameter
Confirm:
8mm (5/16") locking pin diameter
✅ Benefits
- Fast seat and handlebar adjustments
- Secure positive locking engagement
- Durable all-black commercial design
- Smooth spring-loaded operation
- Multiple size options available
- Ideal replacement for worn or damaged adjustment pins
⚠️ Important Fitment Information
Please verify:
- M16 × 1.5 thread size
- 8mm (5/16") locking pin diameter
- Required pin length (18mm, 20mm, 25mm, or 27mm)
Many indoor cycles use similar adjustment knobs, but exact dimensions are required for proper fit and safe operation.
💡 Why It Matters
A properly functioning adjustment pin is critical for rider comfort, bike stability, and workout safety. Secure seat and handlebar positioning improves performance while reducing wear on adjustment mechanisms.