mjr
Comfy armchair to one person & a plank to the next
- Location
- mostly Norfolk, sometimes Somerset
Disclaimer: I've not got that bike and never had that hub. Right?I've found a local chap who has a gazelle HD, he's kindly letting me have a test ride, though I don't know what size it is.
On looking at the specs they do a 54, then it jumps to a 59 - why no 56/57 ? [...]
Question about the nexus 7 speed hub on the Gazelle:- does it take grease or oil ? What kind ?And how often do you change it ?
Thanks again.
The 5cm jump in frame sizes is probably because traditionally these sort of frames had 2" steps in sizes. If you're really in between sizes, you can futz a bit more with seatposts, stems and bar shapes to get it close enough for most people.
Officially, Nexus 7 hubs take an annual oil bath. Unofficially, semi-fluid grease flooding once and then a half-teaspoon more every few months is the best guess so far - excruciating detail with plenty of freak horror stories (including my own collapsing bearing) and links to other resources like hubstripping at https://forum.cyclinguk.org/viewtopic.php?f=5&t=93935 - but I wouldn't do that if you want to keep the hub warranty as most servicers will probably freak out at the dark grey slime covering everything instead of the official black stuff.