I ordered the part from TSS Tuning and wanted to submit a small report. It cost only 25,- + shipping. The installation took about 1/2h. In doing so, this shift-way reduction consisting of 2 parts is clamped on the original circuit and screwed on. Original/with shortening The whole fit also quite well. The rear bracket I had to work easily. Then everything was assembled again and in the switching lanes. Especially gear 2, 4 and 6 are significantly shorter. 1+3+5 rather minimal. Where you original in the leelauf is now gear 4. So about. The circuit has become a bit more direct/fixed again. At the beginning it was a bit unusual, but after a while it was really cool. Here times the shift path at gear3+4. click