Ok so I’m now on a budget groupset combination. I had an old SRAM GX 2x system. I kept the BB and crankset, but removed the inner front chain ring and front derailleur.
I installed a SRAM NX rear cassette, derailleur, shifter, and chain.
I got it indexed and it shifts well, but in the biggest gears the chain falls off my front cog. Any way to prevent this?
Thank you!
by crankynugget
3 Comments
Swapped the chain ring with a narrow wide chain ring?
You need a narrow-wide front chainring to run 1x. Or you can put the front derailleur back on and use it as a chain guide.
You might be able to push the low limit screw in far enough to keep the derailleur on the high chainring. If not you’ll have to put the shifter back on too and keep it in high.
What you essentially did was create a terrible chainline that won’t work when you have the chain at its greatest deflection. plus you took off the only chain retention device (FD). You need to put spacers on the chainring bolts to move the chainring inward (use longer bolts) and put on a cheap narrow-wide chainring for retention.