


Shimano Ultegra Rear Derailleur RD-6600
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Shimano Ultegra Rear Derailleur RD-6600Details: Brand Model: Shimano Ultegra RD 6600 Type: Rear Derailleur Specification: 10 Speed Condition: Used, Cleaned, Fully Functional Origin: Made in Japan Description: Shimano Ultegra RD 6600 10 speed rear derailleur, made in Japan. Provides reliable indexing and precise shifting, an excellent choice for road bike restorations, retro cycling projects, or completing an authentic Ultegra groupset.
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Your Shimano Ultegra Rear Derailleur RD-6600 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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You'll receive a tracking link by email once your Shimano Ultegra Rear Derailleur RD-6600 ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.7 ★★★★★
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Product Reviews
★★★★★ 5
Good interactive toy that keeps even my poodle mix busy
Color: Blue
We have a poodle mix that easily gets bored with most toys, including the other interactive bouncy balls. This toy seems to keep him busy though and so far he has not destroyed it or grown bored of it. The only problem we have is keeping it charged because he seems to wear it out but it is not a problem to recharge it with the USB cable that is included. It is a little tricky screwing the toy back together after charging the battery but I am getting the hang of it. Once it is set to one of the play modes the ropes on top (that you need to put on) will start spinning back and forth and the toy gyrates around seeming like it is alive to our dog. The loves playing with it in all of the modes but I think he likes that faster modes better. It comes with an extra rope which was good because our raptor dog already ripped the first one apart. The price on this toy is relatively low compared to tother toys to I highly recommend this for anyone that has a dog who is bored with the typical play toys.
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Great entertainment for kittens too!
Color: Blue
My kittens love this toy and play with it more than my dog. I bought it on sale. I am impressed with the quality, ease of use, and I rarely need to charge it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 10, 2026
★★★★★ 1
Do not buy… false advertising does not move!!
Color: Red
Terrible!!!
No directions & no movement at all!!!
Button?? Push….
Sure there is no button
No way to charge…
Scam
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 5
Great toy for dogs
Color: Red
My dog loves this toy, it was well worth the money. And I’m glad it charges with USB and not batteries.
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Reviewed in the United States on June 8, 2026
★★★★★ 4
Finally, a Toy That Out-Works My Dog!
Color: Blue
My dog gets bored easily, and this automatic moving ball has been a hilarious and effective distraction. It bounces and rotates on its own, which triggers her hunting instinct immediately. The rope chew attached to the side is a nice touch for some added teeth cleaning while she plays. It’s sturdy enough for a medium-sized dog and the fact that it's waterproof means I don't have to worry when she eventually drops it in the water bowl or takes it out into the melting snow. The *only* issue I have is it starts before I can even screw it back together. It wants to jump out of my hands before I'm ready.
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Reviewed in the United States on February 19, 2026