USA

This has been a great product. I live in St. George Utah, and we have some amazing trails. I have used this 42 tooth ring a lot climbing to some of my favorite descents. My only fuss with it is I purchased it before the 16 tooth came with them, and my shifting has a prominent lag. I was thinking of purchasing the new cage One-Up came out with, but I have a long cage right now and I don't know if it will be compatible. Either way I have enjoyed the performance of my 42 tooth ring on my 1x10.

Works well-easy to set up, directions were good. Price is pretty steep however. Would rate it higher if it weren't $100.00.

The 42-tooth cog allowed me to rid myself of my front derailleur which I was very happy to lose. The shifting was smooth enough from the 36-tooth cog to the 42 considering the rear derailleur (X7 type 2) was not designed for a cog that large. The issue that I had was durability. Granted I ride a fair amount, but I wore out the cog (the chain was slipping over teeth) and the rear derailleur in about 9 months. Though the system worked well, I decided to move to an 11-speed setup that was engineered as a system vs the OneUp hack. That being said I know other riders who are getting more time out of theirs, but I believe they are putting fewer miles on.

Limited range for real world, poor shifting compared to a pure shimano system. I need a bigger gear range to climb steep hills and spin long flats. Not recommended.

it wont shift perfectly without it