CTSC Stainless Steel U-Groove Replacement Ball Bearings – CTSC
CTSC Stainless Steel U-Groove Replacement Ball Bearings - Pack of 2
"Replaced our 3-year-old trolley bearings with this pair and it rolls like brand new again! Completely quiet, smooth, and took 5 minutes to swap out." — Verified Buyer (★★★★★ 5.0/5 from 24 reviews)
🎁 Bundle & Save: Buy any 2 accessories and automatically get 10% off at checkout! Plus, use code HALLOWEEN10 for additional seasonal savings and free US shipping on orders over $99.
Keep your zip line trolley rolling with silky-smooth speed and zero friction. The CTSC Stainless Steel Deep U-Groove Replacement Ball Bearings are precision-engineered drop-in replacements for CTSC and standard backyard zip line pulleys. Over seasons of high-speed rides, bearings can accumulate dirt and wear down. This matched pair of high-carbon stainless steel bearings restores maximum velocity, eliminates vibration noise, and ensures your trolley glides effortlessly along the cable.
⚙️ Precision Engineering & Glide Performance Features
- Dual Matched Pair (Pack of 2): Replacing both sheaves simultaneously ensures balanced load distribution, preventing uneven trolley tilt and premature cable wear.
- Marine-Grade Stainless Steel: 100% rust-resistant stainless steel construction withstands rain, humidity, snow, and extreme outdoor weather.
- Precision Deep U-Groove Design: Specifically contoured U-groove sheave channels center cables from 3/16" (5mm) to 3/8" (10mm) firmly, preventing side slippage.
- Dual Sealed Ball Bearings: Internal rubber dust shields protect precision steel ball bearings against grit, dirt, pine needles, and moisture.
- Drop-In CTSC Compatibility: Exact OEM factory fit for CTSC backyard trolleys, bat trolleys, airplane trolleys, and standard backyard pulleys.
- Whisper-Quiet Glide: High-speed low-resistance rotation delivers a silent, vibration-free ride for kids and adults.
📏 Specifications & Sizing
| Package Quantity | 2 × Stainless Steel U-Groove Ball Bearings (1 Matched Set) |
| Material | High-Carbon 440C Stainless Steel (Corrosion Resistant) |
| Groove Profile | Precision Deep U-Groove Sheave Channel |
| Cable Compatibility | Fits 3/16" (5mm), 1/4" (6mm), 5/16" (8mm), and 3/8" (10mm) cables |
| Bearing Sealing | Dual Rubber Contact Dust & Moisture Shields (2RS) |
| Trolley Compatibility | CTSC Backyard, Bat, Koala, Angel, Airplane, and Standard Pulleys |
📦 What's Included in the Box
- 2 × CTSC Stainless Steel U-Groove Replacement Ball Bearings
🤝 CTSC Quality & Guarantees
- 1-Year Manufacturer Warranty on bearing rotation and steel housing
- 30-Day Money-Back Guarantee
- Free Express US Shipping on all orders over $99 (delivered in 3–4 business days)
❓ Frequently Asked Questions
Q: How do I know when my zip line bearings need replacement?
A: If your trolley begins making grinding or squeaking sounds, rolls with uneven resistance, or noticeably slows down mid-cable, the internal bearings have likely worn or collected debris and should be replaced.
Q: How do I swap out the bearings on a CTSC trolley?
A: Simply unbolt the trolley side plates with a standard hex key or wrench, remove the worn bearings, slide the new pair onto the axles, and re-torque the locking nuts firmly.
Q: Do these bearings require routine lubrication?
A: The bearings are pre-lubricated and sealed with dual rubber shields. For optimal longevity in humid or coastal environments, an occasional light spray of silicone lubricant on the outer groove is recommended.
- Supports up to 800lbs
- CE & RoHS Certified
- Designed and tested with your safety in mind.
1、In order to make your order to arrive more quickly and securely, we will deliver the goods within 24 hours after receipt of order payment. Please ensure that your order address is correct.
2、Before delivery, we will inspect and pack the goods to ensure that the goods received by our customers are in good condition. If there are any problems with the goods, please contact us at the first time.
3、We offer free delivery service,express delivery is estimated to be delivered within 3-4 days.The shipping time during Holiday Season (Christmas etc) could be longer than usual time. Please add another 5-10 days as a delay.
Note：if your shipping address is in a remote area, the express delivery service will require additional delivery costs, and we will not pay for this freight. So we will contact you for the first time, and you need to pay the freight, then we will deliver the goods.
We promise to do the right thing. Over the years, every decision and product we make is focused on customers. Our goal is to bring more joy to those who believe in us. We should be responsible for doing the right thing and the right way.
The products we produce bring laughter to our customers, and we are truly proud of them. If our products cause trouble to our customers, we sincerely feel sorry and try our best to make up for our mistakes. Customer satisfaction is our eternal pursuit.
We promise never to exaggerate the quality of our products. We strictly test every product to ensure that it meets the safety standards and passes the quality certification.
We promise if there are any problems with our products, please contact us in the first time, or you can request a return or refund within 30 days of receiving the product, but please contact us before returning，you just pay for the return shipping. No strings attached.
After using our products，if you are satisfied with our products and services, please 5 stars, if you are not satisfied, please contact us at the first time, we will handle it for you and make you satisfied.
1、Please strictly follow the instructions and ensure the installation is solid.
2、Kids under the age of 10 need to use zipline under the guidance of adults or guardians.
3、Strictly follow kids and adults with a weight limit of 250 pounds.
4、Heart disease and hypertension patients, pregnant women, please do not use products, in order to avoid accidents.
5、Installation between two trees or ends is required, and there is a clear runway between the two without shelter, preferably with a slight slope in the middle of the runway.An end-to-end slope of 3-6%.
Instruction Book Installation Manual: For Installation Video Please See Blog
