Shimano RX100 Rear Derailleur RD-A550

Marsoni

M251S

$44.90

Get it in 3 business days with 1 day shipping. Friday, May 29

Shimano RX100 Rear Derailleur RD-A550Details: Brand Model: Shimano RX100 RD A550 Type: Rear Derailleur Specifications: 7 speed compatible, Short Cage, Capable up to 28T max cog capacity Condition: Used, Cleaned, Fully Functional Origin: Made in Japan Description: Shimano RX100 RD A550 rear derailleur, made in Japan between 1991 1994. Compact short cage design suited for 7 speed drivetrains, offering reliable shifting and solid performance. An excellent upgrade or match for vintage road

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Pack a lunch when you tackle this project boys.. its a doozy!! Month in going great so far definetly did what I purchased it to do. 2000 chevy with two p3 10s every bass drop sounded like an old firebird with loose trunk bolts. Threw this on the back walls floor underneath the speaker and the doors.. all that energy is now in the cab with me instead of getting lost in rattling metal!! Love it!!! Left a few pieces outside after I was done rained like hell on them so water doesnt hurt this stuff at all or direct sunlight in south mississippi.. good stuff pick this up and make them systems thud instead of rattle!!! You wont regret it!! I didn't!!

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Reviewed in the United States on June 11, 2026

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Roseanna Boyce

Fort Morgan, US

★★★★★ 5

Delivers a quieter ride

Size: 36 sqft

This works very well to put down road noise. The difference was immediate in my van. I was shocked it made such a difference.

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Reviewed in the United States on June 6, 2026

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Pawtucket, US

★★★★★ 4

Reasonably priced sound deadening

Size: 18 sqft

Easy to cut with a carpet knife. I used a heatgun to make it stickier and more moldable. The foil isn't so thick that you risk cutting yourself like some Dynamat variants.

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Reviewed in the United States on March 12, 2026

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David

Boise, US

★★★★★ 5

Works for me

Size: 36 sqft

Sticky so don’t let it touch you or each other but it comes off and works fine.

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Reviewed in the United States on June 7, 2026

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