1x11 11-42

[koshari]

Where did you get the plastic moulded bit?

[baabaa]

A few clues in what you could do if you have plenty of $$ here.....
http://gearminded.com/gravel-bike-build ... ross-disc/

[cancan64]

Where did you get the plastic moulded bit?

Its part of a oneup mtb chain guide
http://www.oneupcomponents.com/products/top-guide

[koshari]

Its part of a oneup mtb chain guide
http://www.oneupcomponents.com/products/top-guide

that would explain why your sprocket size adjustmant scale is "inverted"

45usd plus 30 shipping a bit exxy for a bit of extruded plastic,

[cancan64]

you can buy just the head part and can be purchased locally or wiggle etc, I didnt pay that but I was coming second and catching the leader in the New Zealand national CX race before I dropped the chain which I struggled to put back on with frozen fingers and a lot of very tacky mud so if this fixes that problem then worth the expense... havent dropped a chain since I fitted it but I also havent ridden those conditions either ... and any guide head should work