Stromer ST1 chain keeps popping off

Hello,

I originally had a 52T chainring (130 bcd) on my Stromer, which I upgraded to a 54T (SRAM x-sync) to help with 2 separate issues

(a) the chain kept popping off with a 52T chain-ring and
(b) I routinely found myself spinning out

The LBS suggested upgrading to a 54T chain-ring to fix both issues and it certainly helped, but it can be better.

The primary issue I am still facing is the chain popping out, especially when I am riding over a bump at speed. I am less bothered by the spin out, but do feel I could use some room there.

Is a 56T chain-ring a realistic option here, is it the chain itself that is the problem?

Thanks!
 
I don’t think the size of your chainring is the issue.

You could try a chain-stay mounted chain guide to help keep the chain on your front ring.
 
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