Join Date: Dec 2004
Location: Southern Maine
Bikes: 2006 Giant Cypress EX (7-speed internal hub)
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Shifting issues with Nexus 7 internal
Non-mechanic here. I am usually one of those "commuters who only maintain something when it breaks". But knowing that about myself, I just bought a close-out 2007 Giant Cypress EX
, which has the Shimano Nexus 7-speed internal hub, no integrated brake. (The bike comes with sidepull rim brakes.) Generally I am pleased with it, especially given that we have had snow about half the days last week, the bike's first week of use!
I have noticed a slight shifting issue that I have seen referred to elsewhere but would like more input on. Others have referred to it as "missing" or "skipping". When I shift, sometimes it's like I've shifted into a lower gear even though I'm in the higher end, until I adjust the twist shifter slightly and then I get the gear I was expecting. I think it might happen more often while upshifting than downshifting.
I'm not an expert rider, and my previous experience with an internal hub is limited to an old (no idea, maybe 1960's or '70's?) Shimano 3-speed on a Huffy that I got for $3 at a yard sale. So I'm willing to accept that part of it might be my getting used to the shifting style. I realize that I have to stop pedalling or at least ease up on the tension when I shift, so maybe as my technique improves I'll get better at avoiding the problem, or at least learn how to work around it. It might be that with the twist shifter, I haven't gotten the knack of how far to rotate it for a single gear yet. (The weather has been such that usually I'm too busy concentrating on the road and/or the traffic to look at the shifter when I use it.)
But since others have referred to this problem, do you think it's also possibly a mechanical deficiency of the hub itself? If so, is it widespread on all hubs of this model, or could I have gotten a dud that might be able to be replaced?