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Hi. I have an old, very well functional Kalkhoff Pro Connect 2011. However, now I have to replace the bearings for the headset/stem - they were broken and rusty. It is an integrated type, and I suspect it to be an IS41 type (SHIS) - Integrated-angular contact, 1-1/8 inch steering column, 36 x 45...

I am having some problems with my new Kalkhoff Pro Connect C8. The bike feels heavy to use and it started about 3 weeks ago. I got the bike in mid/late April. The bike is heavy to use, and feels even more heavy the more assist I choose. Also, if I do not use assist (even remove battery) the...

Sorry to get into this post but my new Kalkhoff Pro Connect C8 is having some of these issues. I contacted 50Cycles 2 weeks ago about it and they still do not know what it is (still waiting for a reply from Germany). The problem I have is not associated with noise but with the bike feeling...

I have cracks in my Continental tyres too, and I got the PC Disc 2011 about 3 months ago. :mad: 50cycles told me that the cracks are just in the outer layer and possess no problem. :confused: However, I am worried about the rubber quality as I can't understand that cracks should appear so...