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PostPosted: Thu May 26, 2011 11:34 pm 
Dirt Disciple

Joined: Tue May 24, 2011 5:21 pm
Posts: 47
Location: telford
hi has any one ever tried the Onza Disc brake converter as you can get it for £30. as ive been trying to get a specialised shark fin for my 98 fsr ground control comp as i hear mixed reactions about the A2Z adaptor.

heres a pic


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PostPosted: Sat May 18, 2013 2:36 pm 
Dirt Disciple

Joined: Wed Jan 18, 2012 5:02 pm
Posts: 25
Location: Bingley, West Yorks
Thinking about getting this too, old thread I know but did you get / try it?


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PostPosted: Sun May 19, 2013 1:04 am 
Old School Grand Master
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Joined: Sun Sep 05, 2010 1:10 am
Posts: 4756
Location: Heathfield, East Sussex
Ooh, have to get me a couple of those! 8)


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PostPosted: Sun May 19, 2013 8:25 am 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4431
Location: Herts UK
£ 30 :o rose joints typically £ 3 so £ 6 for both, skewer maybe £ 4, metal rod £ 1, plate £ 1 so there is a pretty good mark up (I didn't take into account labour but somebody with a hacksaw and drill could knock one out).


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PostPosted: Sun May 19, 2013 9:10 am 
Dirt Disciple

Joined: Wed Jan 18, 2012 5:02 pm
Posts: 25
Location: Bingley, West Yorks
Hmmm, some optimistic cost projections 02gf74. The iso2000 spec for disc brake fittings specifies a 0.1mm manufacturing tolerances and the high stresses involved round that area will require decently specced and quality assured materials. The plate that fits the dropout needs to have a recess or offset to bring the eyelets back in line with the dropout so would need to be die-cast, forged or machined to accommodate this feature. The metal rod appears to be an alloy item that has been machined with a slight taper each end presumably to shave a few grammes and improve aesthetics. The qr skewer is non standard length so again would incur more work. All this would ramp up the cost. I agree there must be a markup otherwise they wouldn't make it but I imagine its not as much as you think. Now when you compare it to the cost of the A to Z adapter, I think it's a bit of a bargain! I'd certainly be more confident using the Onza item over the A to Z. I actually have an A to Z but have never used it yet as I was put off by poor reviews. I've also procured some rose joints for, as you said, about 3 quid and so I may have a stab at fitting the A to Z but adding a link to the brake boss as in the Onza. However with A to Z's selling for 20 odd quid second hand on popular auction sites I'd probably be better off flogging it and going down the Onza route.


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PostPosted: Sun May 19, 2013 3:09 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 18207
Location: Sunny Glasgow
02gf74 wrote:
£ 30 :o rose joints typically £ 3 so £ 6 for both, skewer maybe £ 4, metal rod £ 1, plate £ 1 so there is a pretty good mark up (I didn't take into account labour but somebody with a hacksaw and drill could knock one out).


Yeah but it would look pants :P
and probably wouldnt fit without 5 hours fettling it :wink:


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PostPosted: Sun May 19, 2013 4:52 pm 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4431
Location: Herts UK
dyna-ti wrote:
Yeah but it would look pants :P
and probably wouldnt fit without 5 hours fettling it :wink:


I would not be so sure about that - a rod with 2 rosejoints at each end, ok, so it is not tapered but a straight side rod isn't going to look too bad. It would take a fair bit of time though.


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PostPosted: Mon May 20, 2013 12:50 am 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 18207
Location: Sunny Glasgow
02gf74 wrote:
dyna-ti wrote:
Yeah but it would look pants :P
and probably wouldnt fit without 5 hours fettling it :wink:


I would not be so sure about that - a rod with 2 rosejoints at each end, ok, so it is not tapered but a straight side rod isn't going to look too bad. It would take a fair bit of time though.



:P :wink: :lol:

Im sure you would make a very nice job of it.


Last edited by dyna-ti on Wed May 07, 2014 1:53 pm, edited 1 time in total.

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PostPosted: Mon May 20, 2013 1:40 am 
Retro Guru

Joined: Tue Jun 28, 2011 1:25 am
Posts: 265
Location: bedfordshire. uk
i got one of the A2Z adaptors or a bike i bought.... i sure would not consider buying one.. it might work ok with a cable disc caliper that had little clamping force but i would not use it with a hydraulic setup.
this onza one looks 100 times better. 30 quid for it looks quite reasonable. to me.


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 Post subject: Re:
PostPosted: Wed May 07, 2014 8:01 am 
Dirt Disciple

Joined: Thu Oct 11, 2012 10:24 am
Posts: 41
Location: South Devon
Hey folks, I've been hunting around for the onward converter, and can't find it for sale anywhere, dans it still available? If so where from? Thanks


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