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PostPosted: Sat May 25, 2013 1:09 pm 
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Joined: Tue Jun 28, 2011 1:48 pm
Posts: 329
Location: SOUTHAMPTON
Disc brake adapter for a 97 marzocchi bomber z1 needed as I just got the disc brake and the hole spacing is different on the 97 forks. Pre IS apparently. Grrrrrrrrrrrrrrr


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PostPosted: Sat May 25, 2013 1:28 pm 
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Joined: Wed Jun 20, 2012 6:25 pm
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Location: New Forest
There were a very very small number of the 'Formula Standard' to IS mounts produced BITD but these are long since out of circulation in my experience. I have a set of 97 Z1's and had the same problem on my Spooky build, I resolved it by searching for and locating a #4 (Formula Standard) Hope C2 Caliper, it took a few months but they are more freely available than any other option. Good luck.


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PostPosted: Sat May 25, 2013 3:50 pm 
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Joined: Tue Jun 28, 2011 1:48 pm
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Location: SOUTHAMPTON
Thanks for that. In the meantime I'll have to adjust an is to suit


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PostPosted: Sun May 26, 2013 11:00 pm 
MacRetro rider
MacRetro rider

Joined: Thu Jul 31, 2008 1:45 pm
Posts: 2614
Location: Near a tree, by a river in a hole in the ground....
Posted on your other thread, you would do well to search the forum, big Eck made some adapters... And twin disks


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PostPosted: Tue May 28, 2013 2:36 am 
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Joined: Sun Jul 27, 2008 6:19 pm
Posts: 613
Location: Canada's Capitol
A2Z components made adapters for those forks. Actually formula and IS mounts are the same bolt spacing as I recall, but the mount distances from the axle center is what is different. IS calipers fit formula mount tabs, but then the standard rotor size ends up a mm or so too large in radius, and the top of the disc rotor carves into your caliper as it spins. The 1998/99 Manitou forks used the formula spacing, when I ran a IS caliper on one with a 160mm rotor, it dug a groove into the top of the caliper as well as into one of the mounting bolts.


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PostPosted: Tue May 28, 2013 11:02 am 
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Joined: Tue Jun 28, 2011 1:48 pm
Posts: 329
Location: SOUTHAMPTON
I'm beginning to think I would be better off swapping them z1's for some forks I can mount the brakes to. The IS bracket hole to the fork are about 1-2 mm further apart. Then the caliper isn,t far enough accross for the disc by 3mm ish and the disc needs to be spaced further from the wheel as the spokes are hitting the caliper. Grrrr. The other option is changing the front wheel and using V brakes. All I want to do is take it for a good hack in the forest.


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PostPosted: Tue May 28, 2013 12:46 pm 
Retro Guru
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Joined: Tue Nov 10, 2009 1:26 pm
Posts: 582
Location: Helsinki, Finland
Just a small correction:
- IS mount: 51mm
- old Formula standard: 48,55mm


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PostPosted: Tue May 28, 2013 1:22 pm 
Dirt Disciple
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Joined: Tue Nov 20, 2012 6:41 pm
Posts: 53
Location: South West
If you have hope brakes with 185mm rotors, you can get away with using 183mm rotors from the V2 and use lots of spacers when mounting the caliper.

It's not pretty but it works.


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PostPosted: Tue May 28, 2013 10:46 pm 
retrobike rider / Gold Trader
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Joined: Mon Jun 22, 2009 11:09 am
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Location: Devon
B3 on here makes adaptors send him a pm he specifically made a batch of these


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