Vertical dropout adapters

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Vertical dropout adapters

Postby Jangari » Sat Sep 21, 2013 4:11 pm

Has anyone got any experience with these adapters? I'd be a bit worried about the structural integrity of the whole system after adding another potential failure point between the rear dropouts and the axle. And they'd have to be pretty damn tight lest they rotate slightly; I reckon that could be disastrous. However, given my difficulties in finding a solution to my chain length woes, I'm willing to try them. They're also slightly cheaper than a tensioner.
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by BNA » Sat Sep 21, 2013 5:06 pm

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Re: Vertical dropout adapters

Postby Mulger bill » Sat Sep 21, 2013 5:06 pm

Never seen 'em before and I'm not sure I want to see 'em again... :? You've already said why.
You'd have to do without a rear brake too methinks.
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Re: Vertical dropout adapters

Postby mikesbytes » Sat Sep 21, 2013 5:17 pm

Personally I'd be reluctant to add another point of failure

Another option is to use a concentric bottom bracket
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Re: Vertical dropout adapters

Postby HLC » Mon Sep 23, 2013 12:21 pm

mikesbytes wrote:Personally I'd be reluctant to add another point of failure

Another option is to use a concentric bottom bracket


or an eno gub, or a half link in your chain, or another gear ratio.
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Re: Vertical dropout adapters

Postby HappyHumber » Mon Sep 23, 2013 12:25 pm

Wouldn't touch 'em myself.
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Re: Vertical dropout adapters

Postby jaseyjase » Mon Sep 23, 2013 1:13 pm

Fixed or SS?

If SS just a run a chain tensioner if you cant find a magic ratio.

if fixed then you'll have to go eccentric bb or eno hub as HLC stated
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Re: Vertical dropout adapters

Postby twizzle » Mon Sep 23, 2013 1:33 pm

mikesbytes wrote:Personally I'd be reluctant to add another point of failure

Another option is to use a concentric bottom bracket


I think you meant eccentric.


And... those adapters look awful, and the idea that it's O.K. to jack the back of the bike up is pretty lame.
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Re: Vertical dropout adapters

Postby HappyHumber » Mon Sep 23, 2013 2:07 pm

Besides the reasons already mentioned...

Even if they were welded steel on steel in that sort of position I'd still question the integrity.

Over tightening the bolt & nut would likely also compromise an aluminium drop-out.

... all are likely as to why we this is something most of us haven't seen before. Can't believe the ebay seller has sold over 10 of them already.
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Re: Vertical dropout adapters

Postby Jangari » Mon Sep 23, 2013 7:39 pm

Okay, that pretty comprehensively warns me off them. Thanks for all your opinions.
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Re: Vertical dropout adapters

Postby Mulger bill » Tue Sep 24, 2013 12:01 am

I dunno what sort of frame you're talking about here but it might be worthwhile giving Jon at Gripsport a call.
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Re: Vertical dropout adapters

Postby HLC » Tue Sep 24, 2013 7:50 am

Mulger bill wrote:I dunno what sort of frame you're talking about here but it might be worthwhile giving Jon at Gripsport a call.


It would be cheaper to buy another frame.

Or a $200 cell fixie.
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Re: Vertical dropout adapters

Postby Jangari » Tue Sep 24, 2013 8:38 am

HLC wrote:
Mulger bill wrote:I dunno what sort of frame you're talking about here but it might be worthwhile giving Jon at Gripsport a call.


It would be cheaper to buy another frame.

Or a $200 cell fixie.


Yeah, not worth it. Just converting a recent alu road frame to a single, and considering possibilities to run fixed. Not looking to spend money on eccentric hubs, eccentris BBs or frame alterations. I'll just keep it simple, run a half-link chain and try to luck out on length, or use a tensioner and go single.
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Re: Vertical dropout adapters

Postby mikesbytes » Tue Sep 24, 2013 3:45 pm

I'm inclined to agree with getting another frame. Buy a cheap fixie frame and enjoy riding something that was designed for that purpose in the first time. Keep your road bike for a road rebuild, you can never have too many bikes
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Re: Vertical dropout adapters

Postby cray- » Wed Oct 09, 2013 3:05 pm

I realise you've all thoroughly warned off the OP from these things, but I'm curious: what kind of axle/hub arrangement would you need in order to clear the nut and all of that exposed thread on the inside face? Would a standard track hub have enough axle on each side to clear that debacle?
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Re: Vertical dropout adapters

Postby mikesbytes » Wed Oct 09, 2013 8:13 pm

cray- wrote:I realise you've all thoroughly warned off the OP from these things, but I'm curious: what kind of axle/hub arrangement would you need in order to clear the nut and all of that exposed thread on the inside face? Would a standard track hub have enough axle on each side to clear that debacle?


Sheldon Brown may help answer this http://sheldonbrown.com/frame-spacing.html
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Re: Vertical dropout adapters

Postby HLC » Thu Oct 10, 2013 8:36 pm

cray- wrote:I realise you've all thoroughly warned off the OP from these things, but I'm curious: what kind of axle/hub arrangement would you need in order to clear the nut and all of that exposed thread on the inside face? Would a standard track hub have enough axle on each side to clear that debacle?


If someone is stupid enough to try these, i'm not sure they would be worried about having enough threads exposed to secure their rear wheel to these things safely.
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Re: Vertical dropout adapters

Postby slidetaker » Fri Oct 11, 2013 12:10 pm

I actually doubt whether these adapters actually work.

We all know that we need at least 2 fixed points to resist any turning moment. The majority of mounting point along the horizontal will create turning moment from the offset between the adapter bolt and the upward shear force from the axle. This will cause the adapter to rotate with the adapter bolt as the centre of rotation.

It is only when the axle is mounted directly (pretty much exactly) under the adapter bolt that it may not have any rotational force.
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Re: Vertical dropout adapters

Postby WestcoastPete » Fri Oct 11, 2013 2:32 pm

slidetaker wrote:I actually doubt whether these adapters actually work.

We all know that we need at least 2 fixed points to resist any turning moment. The majority of mounting point along the horizontal will create turning moment from the offset between the adapter bolt and the upward shear force from the axle. This will cause the adapter to rotate with the adapter bolt as the centre of rotation.

It is only when the axle is mounted directly (pretty much exactly) under the adapter bolt that it may not have any rotational force.


I'm pretty sure they have some kind of slot that fits into the dropout to prevent this, like the anti-rotation washers on an IGH, but as part of the adapter. I reckon they could work Ok, but I personally wouldn't bother.
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Re: Vertical dropout adapters

Postby cray- » Fri Oct 11, 2013 3:46 pm

I was also worried about the rotation issue. There are holes next to the main bolt holes, not threaded through. Maybe they're supposed to take a screw or pin of some type? Doesn't seem to be any slot or fancy washers used.

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Re: Vertical dropout adapters

Postby Saturnstarzz » Thu Oct 17, 2013 12:32 pm

Nice frame though. Avalanche? but I'm biased..
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