Author Topic: Rear Rack with Salsa Alternator Dropouts  (Read 6774 times)

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Offline bengrier

Rear Rack with Salsa Alternator Dropouts
« on: March 31, 2014, 11:46:39 pm »
Salsa claims that you need THEIR alternator rack to work with their dropouts.  This seems like a major oversight, but the real question is, is this true?  What is the limiting factor with using say a Tubus rack?  Does it just end up 2-3 inches higher than normal?  Has anyone tried a normal rack with this not-particularly-useful-for-touring dropout?  What modifications would need to be done to get it to work?

Thanks, Ben

Offline bengrier

Re: Rear Rack with Salsa Alternator Dropouts
« Reply #1 on: April 03, 2014, 10:36:05 am »
1. Ok, I've emailed back in forth with Salsa a couple of times and they won't give me the dimensions of their alternator rack and insist it's the only one that works.

2. I called my local salsa store and they said other racks WILL work but you you have to get a longer bolt to go through the alternator drop out (no big deal) and that the dropouts won't work for their intended purpose.  I'm not sure why this is?  But they said that as long as i'm just using it for the standard gearing that isn't a problem. This suggests it would be a problem if you wanted to run single speed or rohloff or whatever.  Can anyone corroborate this?

Offline DaveB

Re: Rear Rack with Salsa Alternator Dropouts
« Reply #2 on: April 03, 2014, 05:34:36 pm »
I looked at Salsa's web site and read the instructions for these dropouts.  It seems to me is that they are a very complex way to work around providing horizontal dropouts.  They maintain vertical dropouts but allow the horizontal movement needed to obtain proper chain adjustment for IGH and single speed use. 

To get that adjustability, you give up a lot of simplicity and the ability to use off-the-shelf racks and, I presume, fenders.

Offline bengrier

Re: Rear Rack with Salsa Alternator Dropouts
« Reply #3 on: April 03, 2014, 06:15:05 pm »
I looked at Salsa's web site and read the instructions for these dropouts.  It seems to me is that they are a very complex way to work around providing horizontal dropouts.  They maintain vertical dropouts but allow the horizontal movement needed to obtain proper chain adjustment for IGH and single speed use. 

To get that adjustability, you give up a lot of simplicity and the ability to use off-the-shelf racks and, I presume, fenders.

1. Where the rack mounts is on the bolts where dropouts pivot.  Which means that there should be no change in geometry anyway as it's adjusted.  So i don't understand why this creates any difficulty.

2. Even if it did mount near the bottom, the rack forms a triangle with the frame with one angle being hinged, so again i wouldn't see this being a problem! (And actually the rack is really more of a 4-bar linkage with the adjustment in length of the bars going from the seat stays to the rack giving even more adjustability!)

Maybe the alternator rack is permanently hinged to allow for that dropout movement while a normal rack would hinge during setup but would then be tightened down?  I'm also betting that a normal rack will sit a little higher due to the attachment point being higher.  It's my understanding that keeping the weight as low as possible is to your benefit, but i don't see these 2 inches being problematic.