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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
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Description
Reverse Colab Expert Chain Tensioner, SilverReplaces rear derailleur with chain tensioner for a simple, secure drivetrain Expert version elevates the Colab chain tensioner for the most extreme use and easy adjustment Adding 15mm of adjustability for the chainline by loosening one bolt, the Expert version helps riders achieve perfect chain alignment without the removal of the tensioner Adjustable limit stopper as well as a pinch bolt on the mounting bracket and higher spring tension provide more
- Replaces rear derailleur with chain tensioner for a simple, secure drivetrain- Expert version elevates the Colab chain tensioner for the most extreme use and easy adjustment
- Adding 15mm of adjustability for the chainline by loosening one bolt, the Expert version helps riders achieve perfect chain alignment without the removal of the tensioner
- Adjustable limit stopper as well as a pinch bolt on the mounting bracket and higher spring tension provide more chain retention and also maintains position when the rear wheel is removed
- Compatible with 9/10/11-speed chains, 13-17 tooth cogs
- Aluminum construction, made in Germany
Today's Stock Status
8 Available to ship in 2-4 Business Days
UPC: Not available
EAN: 4717480172467
Manufacturer Part Number: 40297
RV6781
178748-Q0-L
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Great product
Size: 4.5", Style: Open
Strong grip
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Reviewed in the United States on April 18, 2026
★★★★★ 5
Work great
Item Package Quantity: 6, Color: Black
Relatively strong hooks. The metal I have them on is thin so the magnets arent as steady as I hoped but thats my fault not the hooks. Ample hook space and solidly built
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Reviewed in the United States on March 23, 2024
★★★★★ 5
You need these!
Item Package Quantity: 4, Color: Black
These are not really “industrial strength” but they work great and are decent quality, especially for the price. I bought them to use on a sheet metal barn and they hold halters, rakes and other supplies with ease. Out of curiosity I did toss a dewalt drill in one and it held even though I ordered the medium size and the drill didn’t fit super well.
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Reviewed in the United States on August 6, 2025
★★★★★ 5
Very useful tools or helmets hanger.
These are quite useful and hold anything that’s less than 10lb. I think it can hold heavier items but I think it’s best to keep it light and the magnet strong enough to make it very convenient to affix it to any metal cabinet or poles.
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Reviewed in the United States on August 7, 2025
★★★★★ 1
Magnet strength is weak AF
Item Package Quantity: 30, Color: Black
Magnet strength is absolutely terrible! I was hoping that they would be strong against my shipping container as the product suggests, but I put a item on it that barely weighs 10 lb and it started sliding down the wall. The magnets are not strong at all!
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Reviewed in the United States on May 6, 2026