For the wheel my wife a replacement for the 38 tooth sprocket was sought because it was "hard" to the original translation. I originally wanted to replace the crack, it would have been cheaper, but would ultimately means much more work. After checking in "pinion computer" (Just enter via search engine) my view therefore fell to the identical Nexus crankset with 33 teeth. Ordered to get to my satisfaction and easily replaced within 15 minutes - the "old-fashioned" 4 Kant attachment makes it possible. The simple but good quality of Nexus components ranges on city bike in my view completely. Now the complete range of gear ratios can be used and uphill driving becomes much easier. The only drawback: The Hebie Chainglider had to be "fashioned", as there are no suitable copy for 33 teeth. But this may Shimano nothing, so this course does not lead to the devaluation.