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PostPosted: Fri Aug 03, 2012 8:41 am 
retrobike rider
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Joined: Thu Oct 14, 2010 1:33 pm
Posts: 3974
Location: Brighton
i have a disc adapter - this one: http://www.fixed.org.au/forums/f9/disc- ... ame-24320/

but, its without the extended skewer and in silver, not ano-red :)


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PostPosted: Wed May 08, 2013 6:18 am 
Dirt Disciple

Joined: Fri Apr 19, 2013 1:35 pm
Posts: 20
Looks like the thread has gone a bit cold

have to warm it up a bit

did anyone manage to make a fin yet???

have a look at this......


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PostPosted: Mon May 13, 2013 7:33 pm 
Retro Guru

Joined: Sat Aug 20, 2011 5:14 pm
Posts: 341
Location: Newcastle
Saw a modified A2Z adapter that looked pretty good IMO.

Some things i would do a little differently, i plan to mod one the same`sh as a test.


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PostPosted: Mon May 13, 2013 8:18 pm 
Retro Guru

Joined: Thu Jul 07, 2011 9:42 pm
Posts: 1870
Location: crawley
theres a guy on the +98 section sellin a set of hope wheels and the no 2 caliper that u guys would need to run discs on the back

its in here
viewtopic.php?f=39&t=256045


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PostPosted: Mon May 13, 2013 11:24 pm 
Old School Hero

Joined: Sun Apr 28, 2013 8:56 pm
Posts: 209
Location: Flipping between Wigan and Lincoln
hARro wrote:
Looks like the thread has gone a bit cold

have to warm it up a bit

did anyone manage to make a fin yet???

have a look at this......


Not sure I'd trust a green sand cast item as a major load-beaing part of my braking system...

I am of course assuming here that the original sharkfin was forged or at the very least heat treated to T-6 temper?

(I still keep looking for a sharkfin on the bay myself in the vain hope... not sure I could get a compatible seat stay for my 2000 model Rockhopper FSR)


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PostPosted: Wed May 15, 2013 1:38 pm 
retrobike rider
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Joined: Sun Dec 18, 2011 10:42 pm
Posts: 2189
Location: milton keynes
ba57ards wrote:
theres a guy on the +98 section sellin a set of hope wheels and the no 2 caliper that u guys would need to run discs on the back

its in here
viewtopic.php?f=39&t=256045

Im keeping it now sorry


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PostPosted: Fri May 17, 2013 1:34 pm 
Dirt Disciple

Joined: Fri Apr 19, 2013 1:35 pm
Posts: 20
Elysarian
this is the sharkfin re-manufacture thread
so lets re-manufacture it 8)

forging is very expensive $$$$$$ for the dies
so inless you make 1000's of them,
we dont know how many specialized made in the 1st place, or how many FSR's either
if someone from the original manufacturing process would get on this forum ???? we'd know..........
it looks from the suface finish and iregularities
from the pics i've seen on the forums to be cast

the design is very rigid, not like this A2Z crap
having to brace back to the V post

braking loads will not be too high, ~120kg
most is taken by the front

i'm making some steel prototypes out of 5mm & 3mm plate

there was a guy a few posts back who wanted a 3D CAD drawing
Image

i'll post details when finished

james may is a legend

awsome stuff these FSR forums


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PostPosted: Fri May 17, 2013 6:06 pm 
Old School Hero

Joined: Sun Apr 28, 2013 8:56 pm
Posts: 209
Location: Flipping between Wigan and Lincoln
hARro wrote:
Elysarian
this is the sharkfin re-manufacture thread
so lets re-manufacture it 8)

forging is very expensive $$$$$$ for the dies
so inless you make 1000's of them,
we dont know how many specialized made in the 1st place, or how many FSR's either
if someone from the original manufacturing process would get on this forum ???? we'd know..........
it looks from the suface finish and iregularities
from the pics i've seen on the forums to be cast

the design is very rigid, not like this A2Z crap
having to brace back to the V post

braking loads will not be too high, ~120kg
most is taken by the front

i'm making some steel prototypes out of 5mm & 3mm plate

there was a guy a few posts back who wanted a 3D CAD drawing
Image

i'll post details when finished

james may is a legend

awsome stuff these FSR forums


You make some good points :)

Thinking about it assuming you could properly heat treat it afterwards I reckon casting would be the cheaper (and easier) way to go...

should be fairly straightforward to make a green sand mould from an original if done right (lost wax casting - using an original as a template - is an option that springs to my mind here as, due to the shape of the item, a split mould might not be easy to make).

I'm guessing here but might the original have been die cast?

Finished item would have to be heat treated to T5 or T6 too


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PostPosted: Wed Jul 03, 2013 6:50 pm 
Retro Guru
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Joined: Mon Jan 03, 2011 5:32 pm
Posts: 327
Location: Gatwick
I have someone that can make a sharksfin but I need to give him a blueprint for it or an original. Can't find either anywhere. I want one for both of my fsr's. any one can get me either of them then I can get them made within a week.


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PostPosted: Thu Jul 04, 2013 3:07 am 
Retro Guru

Joined: Tue May 06, 2008 4:24 am
Posts: 713
Location: Edinburgh
Proflex 1982 wrote:
I have someone that can make a sharksfin but I need to give him a blueprint for it or an original. Can't find either anywhere. I want one for both of my fsr's. any one can get me either of them then I can get them made within a week.

if you want the original blueprint you will probably have to buy it from specialized


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