Mountain Biking - Internal hubs
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02-09-11, 11:08 PM
Why no internal hubs on Mtn bikes? Whats the down side?
Well if it's truly an internal hub...you would have no way to access the spoke holes. The hubs have to remain external so you can attach a rim and tire. There are alot of internally geared external hubs on MTB's these days that you should check out too!
02-10-11, 09:48 AM
The biggest reason likely has to do with the way internally geared hubs work. Because it is a planetary gear system, it depends on a completely straight axle. If you bend an axle on your Alfine or Rolhoff, not only will you not be able to shift but your wheel won't roll at all. Bike manufacturers aren't likely to spec an internal that is even remotely likely to seize on the trail.
If your version of mountain biking involves lots of doubletrack or flowy rollers, go right ahead and retrofit your hardtail. If your typical ride is a little more jarring, with drops and square-edged hits, wait for the unobtainium-axled version.
For full disclosure, I am a huge fan of internals. I'm still thinking of putting an Alfine 11 on my Kona Unit for commuting, winter XC riding and lighter xc fare. I wouldn't put one on my five inch dually.
^^ If I still had my Blindside, I'd have toyed with an Alfine. From what Dannihilator tells me, it's one that *may* be up to the rigors. Unfortunately, the Yeti is 150 hub spacing.
02-10-11, 10:01 PM
Every time I ask our Shimano rep if Alfine is rated for offroad use yet, he says no with a wink. According to no one in particular, he says there are tons of people doing it already. All of them, I guess, armed with the knowledge that if they case a landing they won't even be able to roll the bike out but carry it out.
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