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Disc Brakes and Horiz Drop Outs

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Disc Brakes and Horiz Drop Outs

Old 12-04-05, 11:32 PM
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Leviathan
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Disc Brakes and Horiz Drop Outs

Okay I have disc brakes and Horizontal Dropouts. I have never taken the rear wheel off since I bought the bike, but today I needed to change a flat. Well when I tried to take the wheel out I ran into a problem. When I try to pull the wheel out the top of the rotor runs into the top of the caliper. So do I have to unbolt the caliper in order to get the wheel out of the frame? There's gotta be a better way . . .
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Old 12-05-05, 09:12 AM
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Is this a FG or SS problem? I didn't know people ran rear disc brakes around here.
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Old 12-05-05, 09:13 AM
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You'd have to unbolt that sucker, mate.
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Old 12-05-05, 09:14 AM
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disc brakes??? huh??
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Old 12-05-05, 09:34 AM
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plenty of singlespeed dirtjump/freeride bikes out there. they run discs.

and yea leviathan - sounds like you're screwed. send a pic of the d/o and disc mount if you want. what bike?
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Old 12-05-05, 09:39 AM
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On my Surly 1x1, I can get away with taking out the bottom bolt, and only loosening the top one. Swing the caliper up, and its out of the way.

Once I'm done building my fixed gear, I am seriously thinking of changing the 1x1 to a mullet braking system. Mullet means Disc up front, and rim brake in the rear.
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Old 12-05-05, 09:43 AM
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yeah it sucks, thats why most disc brake singlespeed mountain bikes have eccentric bottom brackets and vertical dropouts.

I have a surly 1x1 and used to have the same problem. Depending on what rear brake you use there, you can have a host of different problems. Good luck. To make alligning the rear caliper and wheel easier after replacing the wheel try and mark exactly where the brakes and wheel were mounted before you remove them.

I now run the 1x1 fixed and it has solved the rear brake issue

Edit: I run the Mullet on a SS bike and you really barely or don't notice the rear disc brake. It is a perfectly cromulent braking setup.
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Old 12-05-05, 09:59 AM
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Originally Posted by unsuspended
yeah it sucks, thats why most disc brake singlespeed mountain bikes have eccentric bottom brackets and vertical dropouts..

or sliding rear vert d/o set ups

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Old 12-05-05, 10:02 AM
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Yeah...there are some drop out solutions....
I just opt for the v brake rear and front disc.
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Old 12-05-05, 10:07 AM
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Wow. I was going to say that that is not what cromulent means, but I thought better of myself and Googled it. Turns out you're right, and now I know something useless. Yay me
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Old 12-05-05, 10:13 AM
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Originally Posted by eddiebrannan
or sliding rear vert d/o set ups

yeah, I like the setup that Soulcraft is using now, very slick indeed.
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Old 12-05-05, 11:33 AM
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Originally Posted by jmgorman
Is this a FG or SS problem? I didn't know people ran rear disc brakes around here.
Think first bro, there are lots of SS's w disc brakes out there!

Chain stretch and gear sellection does cause disc to caliper/pad alignment problems, but that is easily overcome. On the Bianchi SS mtn bikes, the caliper mounts on the frame is slotted and this allows you to loosen the bolts to swing it out of the way when you change the wheel and also allows you to realign the caliper to compensate for chain stretch and gearing changes. However, for gearing changes, what I found was that it is best to keep the total number of teeth (CR and Sprocket) to odd or even depending on the stock set up. The bikes w adjustable BB's don't have these problems. But they do cost more, don't they?
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Old 12-05-05, 11:42 AM
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Originally Posted by eddiebrannan
or sliding rear vert d/o set ups

That is the ugliest dropout setup ever. Give me the Kona or On-one style any day.
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Old 12-05-05, 11:45 AM
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works though. evil imperial is a bad-ass dh/fr/dj hardtail
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Old 12-05-05, 12:34 PM
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What the hell is that droput thingy? You got three vertical dropouts, so you still need a tensioner or an ecceentric BB. Then what's the use? You can vary your chainstay length? Great...
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Old 12-05-05, 12:45 PM
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varying chainstay length is kinda useful for freeride/dh.
you're right; it's not there to facilitate easier ss set-up. does help somewhat though.
.243 racing has a fully sliding setup - like a vertical dropout (with disc boss and der hanger) set in a track-end - which is designed to facilitate ss set-up should that be needed. couldn't find a pic of it though
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Old 12-05-05, 03:25 PM
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I've got one of the bianchi mtbs, and as long as your wheel is around the middle of the dropouts, you can position the caliper such that you can slide the wheel right out. Fiddle with it a little.
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Old 12-05-05, 08:47 PM
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Thats more for adjusting chainstay length than chain tension in a singlespeed setup... Notice the hanger. Those aren't sliding dropouts, those are dropouts with three positions.

-brad

Originally Posted by eddiebrannan
or sliding rear vert d/o set ups

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Old 12-05-05, 08:49 PM
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as was stated two posts above yours
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Old 12-05-05, 09:07 PM
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the true sliding vertical dropout is found on the kona unit, and paragon makes an even better one than kona's. you can get the paragon dropout on whatever fully custom bike you want....IF, gunnar, soulcraft, kelly, etc
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Old 12-06-05, 08:48 AM
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Originally Posted by eddiebrannan
works though. evil imperial is a bad-ass dh/fr/dj hardtail
I see. If you're dropping big-boy stuff, then those monsters make sense. The weenie Kona or on-one dropouts would probably snap off on an 8-footer to flat. Form follows function.
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