Item Condition: New
Indoor Cycle Pop Pin / Pull Pin – Red - Black Adjustment Knob M16 Thread
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Item Description
Condition New
Indoor Cycle Pop Pin / Pull Pin – Red & Black Adjustment Knob
M16 × 1.5 Thread | Available in 18mm, 20mm, 25mm & 27mm Pin Lengths
This M16 × 1.5 indoor cycle pop 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 a high-visibility red adjustment button, durable black housing, and commercial-grade construction, this replacement pull pin is ideal for fitness facilities, cycling studios, hotels, apartment gyms, and home fitness equipment.
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 |
|---|---|---|---|
| #7688-18R | M16 × 1.5 | 8mm (5/16") | 18mm (0.71") |
| #7688-20R | M16 × 1.5 | 8mm (5/16") | 20mm (0.79") |
| #7688-25R | M16 × 1.5 | 8mm (5/16") | 25mm (0.98") |
| #7688-27R | M16 × 1.5 | 8mm (5/16") | 27mm (1.06") |
Common Dimensions
- Knob Diameter: 50mm (1.97")
- Thread Size: M16 × 1.5 Fine Pitch
- Pin Diameter: 8mm (5/16")
- Color: Black Housing with Red Adjustment Button
🚴 Compatible Indoor Cycle Brands
Commonly found on select models from:
- Schwinn Indoor Cycles
- Star Trac Spinner Series
- Keiser M3 / M3i (verify dimensions)
- Stages Indoor Cycling Bikes
- Spirit Fitness Indoor Cycles
- BH Fitness Indoor Cycles
- SportsArt Indoor Cycles
- Endurance by Body-Solid Cycles
- XTERRA Fitness Bikes
- Sunny Health & Fitness Commercial Models
- Various OEM spin bikes and indoor cycles
🔩 Key Features
Spring-Loaded Pop Pin Design
Provides quick seat and handlebar adjustments while maintaining secure locking engagement.
M16 × 1.5 Fine Thread
Precision-machined thread provides secure installation and smooth operation.
High-Visibility Red Release Button
Makes adjustments easier and faster in commercial gym environments.
Commercial Grade Construction
Built for repeated daily use in cycling studios and fitness facilities.
Multiple Length Options
Available in four pin lengths to fit a wide variety of indoor cycle adjustment systems.
🚴 Common Applications
- Seat height adjustment
- Seat fore/aft positioning
- Handlebar height adjustment
- Handlebar fore/aft positioning
- Indoor cycling bike positioning systems
- Commercial spin bike maintenance
📏 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
- High-visibility red release button
- Commercial-grade durability
- 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 pop pin is critical for rider comfort and safety. Secure seat and handlebar positioning improves bike stability, rider ergonomics, and overall equipment performance while reducing wear on adjustment assemblies.
Let customers speak for us
from 1243 reviewsOrdered a part from Hydra Fitness Parts because the OEM part was back ordered for months. Part came in just a couple of days and had it installed by my service tech shortly after. My cross trainer works like new again. Definitely recommend.
Works great perfect fit would buy again
I moved my treadmill from one room to another. I happened to break off a rear foot to it during a difficult spot. It has been like this for 2 years. I decided to look for the part, it was hard to find. But then I found it and jow my treadmill is back together and ready to use
Ordered a part for our treadmill that got lost during a move. Perfect fit! Quick and easy shipping. Would highly recommend if you are looking for odd parts for your Horizon treadmill.
Hydra fit had the part I needed to repair my Bowflex treadmill for only $150. Bowflex techs were telling me I needed a new monitor control for $2,000 but I knew that was wrong because there was no electrical supply to the monitor so it couldn’t be that! Hydrogen gave me a couple ideas I I figured it out. NO thanks Bowflex, and thanks hydro fit.
Used power rods appear to be in good shape and delivery time was very good.
Parts no longer made from my treadmill. Hydra Fitness Exchange had a front roller that works great! Quiet, smooth, almost like new again! Timely shipping, good packaging, helpful website. Thanks!
Product fits perfect. Was able to verify that it would fit my model, and it arrived in a timely fashion. I would order from you guys in the future.
Spirit XE200 elliptical. Common problem of the wheels jumping off and galling the aluminum track rail covers. By the time I fixed the problem, my original track rail covers were too damaged. These were inexpensive and appear to be OEM. Only two bolts to swap them out. Excellent!
Ordered replacement part for my eliptical machine and fit tightly into place and the machine is working fine.
Upon receipt of the item, it would not charge. In working with them I was told to give charging one last shot. This time I pressed the start button multiple times and it started to charge. It synched with my bike. I thanked them for their patience in working out the problem.
The website was easy to use and the product arrived when promised.
We’ve been looking for this part for about 7 years. It fits perfectly. Shipping time was excellent.
Thank you so much!
Product was received on time and fit the description as advertised.
Great value for the price.
