Chain guide for TSDZ2

[lpd2]

Can anyone recommend an effective and reasonable chain guide for the TSDZ2? I am finding the chain frequently comes off over bumps.

I think it would have to clamp to the seat post, but if anyone has any other idea I would be glad to be advised. I've seen a few online but the prices seem crazy, it would be cheaper to buy and modify a front derailleur.

 

[georgehenry]

Assuming your chain line is OK and there is no underlying problems with chain line geometry, a narrow wide chain ring of the right size and compatible bolt holes would stop your chain coming off and be very hard wearing as well.

I fitted a Garbaruk chain ring to my Haibike sDuro Yamaha In Feb 18 that has completed over 2500 miles with lots of bumpy off road and no dropped chain. Better than a chain guide.