claulo

Good afternoon
I would like to know if it is possible to use a 46t single chainring, with an 11/50 cassette. Would there be compatibility problems, beyond the rear derailleur and chain??
greetings

Kapusta

In theory only potential issue I see is that your frame might not clear a 46t ring in the position you would be wanting to run a single ring. .

But it really comes down the the particulars of what you are planning to do.

cxwrench

The bigger the chainring you use the more pronounced chainline issues will be. A friend has a brand new custom bike with a SRAM drivetrain. 10-52 cassette and 42t chainring. The chain falls off the chainring all the time unless he's in one of the middle cogs due to shortish chain stays and large cogs/chainring. It's pretty frustrating because there is nothing we can do to stop it other than go to a much smaller chainring.

Iride01 

On the correct bike with the correct rear DR and the proper chain, cogs and rings for 1x it should be no problem.

Litespud

Why would the size(s) of the chainring or sprockets exacerbate chainline issues? The chain engages or disengages at essentially the 12 o'clock position of each, regardless of size(s) of the respective ring/sprockets. The factor that determine whether the chain derails or not is the magnitude of chain deflection as it engages the sprocket and ring. This is exacerbated by short chainstays, which increase the the deflection angle for a given ring/sprocket combination. However, for a given chainstay length and sprocket/ring combination, the geometry of the setup (which determines the angle of chain deflection) shouldn't change if you increase/decrease the size(s) of the sprocket and ring. I'm not disagreeing with your observation, I'm trying to figure out why larger rings/sprockets would exacerbate chainline issues.

Iride01 

"shortish chainstays"

79pmooney

Sounds like that bike wants a "keeper". Say an FD like device with no moving parts, just a seat tube clamp and arm that reaches over the chainring with two steel pins coming down that the chain just touches when on the extreme cogs in back. When I raced a Uniglide chain in the late '70s, I used to narrow the FD sweep to touch the chain in the big-big and small-small gears to keep it on. (My Sedis training chains had no such issues.)

So, time for a new invention. It should have adjustability; perhaps the pins on a track. It must be light, sexy and have a grabber of a name. Clamp should adapt to a wide variety of seat tube sizes and shapes and be kind to CF. Cheap to make, simple. I"m busy so I'll leave the details (and future wealth) to someone else. (Besides my 1X are X1 at the other end and don't derail.)

cxwrench

It's on it's second one now. Started w/ Paul's, now it has a Wolftooth.