Bolt on Dropouts WTF?

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Bolt on Dropouts WTF?
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flag sherbet
Posted: Mar 21, 2008 at 15:10 Quote
BMX8000 wrote:
yeah just not as overbuilt they are similar to a brake adapter in thinkness.

No, uhm, it looks nothing like a kona.
flag BMX8000
Posted: Mar 21, 2008 at 15:17 Quote
I'm talking about the dropouts not the bike.
flag sherbet
Posted: Mar 21, 2008 at 15:19 Quote
I realize that. It still doesn't look like a kona's dropout system.
flag Borgschulze
Posted: Mar 21, 2008 at 15:25 Quote
sherbet wrote:
Unsecure image, only https images allowed: http://www.quamenbikes.com/large/emoframe-4.jpg

That's a retarded design.

With braking forces from a disc brake, it has ejection force on the wheel with the dropout pointing backwards.

I read a huge page on how front disc brakes on QR forks can possibly cause the front wheel to eject from the dropouts if a freak accident happens that you didn't tighten the wheel on good enough.
flag BobbyOCR
Posted: Mar 21, 2008 at 15:38 Quote
That quamen's dropouts are a similar system, but you could make 4 kona dropouts out of one of those monsters. We got a bunch of 08 konas in at the shop, and we all thought, while ugly (which seems to be a Kona trademark), it is a great idea. BUT, we think it is solely for the purpose of being replaceable, we haven't spotted any horizontal drops on the market to fit. And I wouldn't really risk it, the system is a little small, and awkwardly placed, but I guess if you used strong enough bolts and designed it carefully (maybe sandwich the mounts instead of one side only) it should work fine.
flag plumslinger
Posted: Mar 21, 2008 at 15:41 Quote
Borgschulze wrote:
sherbet wrote:
Unsecure image, only https images allowed: http://www.quamenbikes.com/large/emoframe-4.jpg

That's a retarded design.

With braking forces from a disc brake, it has ejection force on the wheel with the dropout pointing backwards.

I read a huge page on how front disc brakes on QR forks can possibly cause the front wheel to eject from the dropouts if a freak accident happens that you didn't tighten the wheel on good enough.

Note the work freak accident. Plus why wouldnt you tighten the wheel on properly. And why would the wheel pop out backwards from those drop outs?
flag morewhitenoise
Posted: Mar 21, 2008 at 16:08 Quote
just like the dropouts on my intense!
flag minimole
O+
Posted: Mar 21, 2008 at 16:13 Quote
plumslinger wrote:
Borgschulze wrote:
sherbet wrote:
Snip

That's a retarded design.

With braking forces from a disc brake, it has ejection force on the wheel with the dropout pointing backwards.

I read a huge page on how front disc brakes on QR forks can possibly cause the front wheel to eject from the dropouts if a freak accident happens that you didn't tighten the wheel on good enough.
And why would the wheel pop out backwards from those drop outs?

Im guessing theyre not designed for SS setups as the dropout slot is so short. ie theyre designed for QR. Which means the only thing holding the wheel in is the friction of the QR skewer, not a solid piece of metal (ie a vertical dropout frame).
So hit a big square edge rock and out pops your wheel, no matter how tight the QR is done up.
flag rossgirvan
Posted: Mar 21, 2008 at 16:18 Quote
The back force is never going to be strong enough to push through a clamped QR, anyone who is stupid enough to not close their QR's deserves to have their wheel fall off
flag Borgschulze
Posted: Mar 21, 2008 at 16:19 Quote
minimole wrote:
Im guessing theyre not designed for SS setups as the dropout slot is so short. ie theyre designed for QR. Which means the only thing holding the wheel in is the friction of the QR skewer, not a solid piece of metal (ie a vertical dropout frame).
So hit a big square edge rock and out pops your wheel, no matter how tight the QR is done up.

Exactly.

I don't really like when something is designed in such a way.

It's the thought of having forces push in a way that will remove a part.

rossgirvan wrote:
The back force is never going to be strong enough to push through a clamped QR, anyone who is stupid enough to not close their QR's deserves to have their wheel fall off

http://www.ne.jp/asahi/julesandjames/home/disk_and_quick_release/
flag minimole
O+
Posted: Mar 21, 2008 at 16:19 Quote
Im pretty sure pinning it down a rough DH track could loosen a wheel from that dropout without too much difficulty.
flag rossgirvan
Posted: Mar 21, 2008 at 16:23 Quote
I used to run DH tracks on horizontal drop outs and a QR and discs never experienced a problem myself
flag minimole
O+
Posted: Mar 21, 2008 at 16:31 Quote
Its hardly a normal horizontal dropout though is it, the axle would only have to move back 5mm to have pretty bad consequences...
flag cammyboy
Posted: Mar 21, 2008 at 18:43 Quote
Unsecure image, only https images allowed: http://www.dmrbikes.com/res/dynamicResources/largeImages/FRMSK07_6.jpg

The DMR sidekick has bolt on drop outs. they come in vertical and horizontal, which also comes in 14mm and 10mm sizes.
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