The SUMC 12-speed Shimano-specific flattop chain is praised for its flawless shifting, quiet operation, and weight savings, but its high cost and uncertain durability are noted drawbacks.
Pros
- Saves about 10-15 grams off the bike
- Shifting is absolutely flawless
- Color matches the bike's color scheme
- Super quiet operation with ZTTO ultimate cassette
Cons
- Expensive compared to standard chains
- Durability unknown (long-term not yet tested)
Key Facts
- 12-speed Shimano-specific flattop chain
- Hollow pins and hollow plates
- Saves about 10-15 grams compared to standard chain
Reviews & Ratings
The reviewer mentions using a SUMC 12-speed Shimano-specific flattop chain with hollow pins and plates, which saves about 10-15 grams off the bike. They note that the shifting is absolutely flawless and the color matches their bike's color scheme.
AI Summary
Pros
- Saves about 10-15 grams off the bike
- Shifting is absolutely flawless
- Color matches the bike's color scheme
Key Points
- 12-speed Shimano specific flattop chain
- Hollow pins and hollow plates
- Weighs less than standard chain
I received Shimano compatible SUMC flattop chains and so far I'm impressed. The packaging is premium, I really like how the chains look on the bike. I did a couple of rides so far and the chains are somehow super quiet with a ZTTO ultimate cassette. I used shimano chains with those cassettes and the noise was unbearable, KMC was much better but SUMC is next level quiet. I use it with a newest generation of the Ultimate cassette so the new cassette design might also help. Can't comment on the durability, will see if it lasts. Buying these chains does not make a lot of sense though unless you really want flattop with a non-sram drivetrain since these chains are very expensive.
Where to Buy
sumc 12 speed bike chain crescent chain road bike mountain 126 links ultra light bicycle chain for Shimano
Questions about sumc 12 speed bike chain crescent chain road bike mountain 126 links ultra light bicycle chain for Shimano
Sign up and share your experience — help other riders decide!
Create Account & Review