Does anyone apart f...
 

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[Closed] Does anyone apart from Cotic . . .

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make a rigid fork with a disc brake mount on the front of the right hand leg?
I'm looking for a slightly longer one and with the disc in the usual position it's not so easy to fit mudguards

 
Posted : 14/01/2010 8:54 pm
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A solution looking for a problem. There are lots of forks which will take a disk and mudguards.

 
Posted : 14/01/2010 8:57 pm
 cp
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the other advantage is that under braking the effective pivot point of the wheel is in front of the dropout, so the resultant force acts to push the wheel into the dropout rather than out of the dropout.

sorry, don't know any others. although it's practical, it's not exactly aesthetically pleasing eh?!

 
Posted : 14/01/2010 9:00 pm
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cp - Member
the other advantage is that under braking the effective pivot point of the wheel is in front of the dropout, so the resultant force acts to push the wheel into the dropout rather than out of the dropout.

So - every other fork manufacturer has it completely wrong.......

 
Posted : 14/01/2010 9:04 pm
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More or less, onion.

 
Posted : 14/01/2010 9:17 pm
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More or less, onion.

 
Posted : 14/01/2010 9:17 pm
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So - every other fork manufacturer has it completely wrong.......

Well, all except Pace did with canti mounts...

 
Posted : 14/01/2010 9:18 pm
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more or less, onion

 
Posted : 14/01/2010 9:21 pm
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more or less, onion

 
Posted : 14/01/2010 9:31 pm
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Less please, unless they're pickled.

 
Posted : 14/01/2010 9:32 pm
 cp
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from a purely mechanical point of view, yeah, they are all designed less than optimally.

In the real world though, very few people have problems with the way the vast majority are, and it does look a hell of a lot better!

 
Posted : 14/01/2010 9:44 pm
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[i]it's not exactly aesthetically pleasing eh?! [/i]

tis mudguards we are talking about no? 🙄

<trying to be useful>

What's wrong with bending the stays around the caliper?

</trying to be useful>

 
Posted : 14/01/2010 9:49 pm
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Onion- "So - every other fork manufacturer has it completely wrong..."

They were put that way in the first place because motorbikes are like that, I reckon, not because it was the best place. Engineering wise it's undeniably not the best option. TBH front mount looks stupid and that alone is enough of a reason to go with a sub-par engineering solution in my book 😉

 
Posted : 14/01/2010 10:03 pm
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Northwind - Member
> Onion- "So - every other fork manufacturer has it completely wrong..."

They were put that way in the first place because motorbikes are like that,

Like this one?

[img] [/img]

All early motorbike disk brakes were fitted to the leading edge of the forks. Then they changed......

 
Posted : 14/01/2010 10:33 pm
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Still not as fugly as Thorn's fork with Vee brake calipers on the wrong side of the fork.

 
Posted : 14/01/2010 10:34 pm
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No Onion, not like that one obviously- you've had to go back a way to find a motorbike with a front-mount caliper, that CB's got to be at least 30 years old. I said, pushbikes got trailing calipers because that's what motorbikes [u]have[/u], not had back in the dawn of time.

 
Posted : 14/01/2010 10:48 pm
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The Cotic design does force the wheel into the dropout under braking, but it makes far less sense in a modern post mount config.

The force generated on the calliper bolts by the calliper attempting to stop the wheel via the disc rotor is effectively forcing the calliper away from the fork mounts. On a conventional design (especially with smaller rotors) the force is pressing the calliper into the fork leg. Much less strain on the mounting bolts.

+ with angled dropouts the dropout alignment is almost parallel to a radius path to the calliper effective pivot point, meaning that the wheel would somehow have to have a force generated from above to force it from the dropout.

Conventional is better.

To answer the OPs question...sorry dunno.

 
Posted : 14/01/2010 11:59 pm

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