Community > Rohloff Internal Hub Gears
Rohloff flange support rings
in4:
I was doing a little reading about rohloff hubs and flange support rings ( as one does on a Saturday evening!) and wondered if rohloff owners here had chosen to use them, particuarly when heading off into rough country with a heavy load.
http://www.rohloff.de/en/products/speedhub/flange-support-rings/index.html
I picked up on the subject over at http://forum.cyclinguk.org/viewtopic.php?f=5&t=104463&start=30
mickeg:
I have never heard of these before. If I was aware of them when I bought my hub in late winter/early spring 2013, I might have bought them. But, now I do not know if I would bother if I had a reason to lace up a new rim. Since my hub does not appear to have needed them yet, maybe I have nothing to worry about?
I do not have a spoke tension gauge. After I built up my wheel, I had a friend that volunteers time at a bicycle charity use a spoke tension gauge on it so I could get the spoke tension right. I do not know if checking spoke tension is a critical factor or not, but I thought it made sense to do since I could get the tension checked without cost.
I expect to load up my Nomad for touring, but I probably will put less stress on it than the typical tandem user. I also have a 36 spoke wheel, not 32, that might help a small amount.
Andre Jute:
Jobst Brandt was of the opinion that the tension matters a great deal, and Sheldon Brown liked the tension to be even. The makers of my exceptionally tight and longlasting wheels provide a printout of the tension on every spoke with every wheel.
I also received a private letter from a German engineer who said that a) having 28in rims rather than 26in makes a difference because the spokes are a useful fraction longer, and b) that Sapim's Poleax nipples make a big difference in enabling wheels with all spokes tensioned to within 1% of every other spoke, without sacrificing any other desirable characteristic like roundness and hub centering both vertically and horizontally.
He also said, though, that possibly the biggest factor was that my exceptionally good wheels started on hefty Exal rims custom-drilled to take a Rohloff gearbox and so were born with the straightest spoke run possible.
On the subject of more spokes than 32 or 36 for Rohloff wheels, it is possible to drill the flanges for any application in a pattern Chalo Colina developed. He's a huge guy, whose dream was to get his weight down to 350 pounds, so he thought a 48 spoke wheel would be about right. Being a Boeing toolmaker (i.e. a boss machinist) no doubt helped. You can get the same job done by Aaron Goss of Aaron's Bike Repair in Seattle for $40 who had Chalo consulting the first time around according to his notes at http://www.rideyourbike.com/48spokerohloff.shtml Also some chatter on The Lazy Rando at https://thelazyrando.wordpress.com/2010/03/17/48-hole-rohloff/#comments.
onrbikes:
I always thought that area looked a bit thin/weak.
Why not just make the hub a slightly larger diameter and we all have a stronger hub.
An extra 2mm per side (4mm diameter) surely wouldn't matter to the overall weight.
macspud:
I'm reawakening this old thread because I was looking at the hub support rings on the Rohloff website https://www.rohloff.de/en/products/speedhub/flange-support-rings/index.html the other day and found that Rohloff have increased the size of the flange on the hub-cap side.
Also: https://www.rohloff.de/fileadmin/rohloffde/produkte/speedhub/zubehoer/8523_8524_Flanschring_Rings_for_Flange_de_en_nl_fr_2015.pdf
It's interesting that they have done this but I wonder why it's only on the hub-cap side.
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