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PostPosted: Wed Apr 23, 2014 10:23 am 
Dirt Disciple
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Joined: Sat Jul 11, 2009 7:57 pm
Posts: 14
Location: with the Tykes
I'm thinking of putting a rigid fork on my 21" Pro 825. The current fork which I put on is the wrong size (Marzocchi Bomber 2006 105mm). As the bike was purchased without a fork, I'm not sure of the dimensions of the original setup.
I have tried to research the early A-C lengths of the RS Judy SL, XC etc and I believe they were 420 mm (63 mm travel).
I'm looking at either the Exotic carbons or a Surly 1x1 to utilise a front disc brake.
The Exotics can come in 390, 425 and 445 mm A-C and the Surly will be 413mm.
Which is the correct length for a rigid to maintain the intended geometry of the frame?


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PostPosted: Wed Apr 23, 2014 7:26 pm 
Dirt Disciple
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Joined: Sat Jul 11, 2009 7:57 pm
Posts: 14
Location: with the Tykes
I have had a reply from CarbonCycles re the Exotic fork and they recommend the 390.
However, I found the Sprocket Junkies website with Brainz' Team 925 SS where he has used the Exotic fork size 425. http://www.sprocketjunkies.com/team-925-ss/

I've sent a PM to Brainz but he appears not to have visited this forum for a long while.

How will the ride be affected with using either a 390 or 425 size fork?
Excuse me if these questions sound daft but I'm really new to this sort of thing!


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 Post subject: Re:
PostPosted: Mon Jun 18, 2018 11:11 pm 
Dirt Disciple
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Joined: Sat Jul 11, 2009 7:57 pm
Posts: 14
Location: with the Tykes
Bumping this old thread.

I've sourced a Parkpre 17 inch frame for the Missus, and I need to put a rigid on it.

I put a 390mm Carbon on my Pro825 (21 inch), but it's very difficult to get these now, no stock in Carbon Cycles.

Can anyone advise if the 425 mm rigid will be ok?


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PostPosted: Mon Jun 18, 2018 11:25 pm 
Old School Grand Master
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Joined: Thu Nov 26, 2015 7:29 pm
Posts: 3690
Location: peak district
Hi, im not sure about the fork, but a fan of Gong 8)


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 Post subject: Re:
PostPosted: Mon Jun 18, 2018 11:49 pm 
Retro Guru
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Joined: Thu Jun 23, 2011 11:25 pm
Posts: 1920
Location: It's not easy being a dolphin.
It will be on the upper limit. 410mm would be better for the year of that frame. Look for a S/H Pace RC31.


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PostPosted: Tue Jun 19, 2018 12:13 am 
Dirt Disciple
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Joined: Sat May 24, 2014 2:59 pm
Posts: 67
Location: Outside looking in .....
Wow i'm not the only Gong fan here
have a cup o tea have another one..
Have a cup of tea ,yo.
sorry..


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 Post subject: Re:
PostPosted: Tue Jun 19, 2018 5:38 pm 
Dirt Disciple
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Joined: Sat Jul 11, 2009 7:57 pm
Posts: 14
Location: with the Tykes
Looks like a Mosso alloy might be the only option for new.
https://www.ebay.co.uk/itm/Mosso-Alumin ... Sw2iJbEMUj

Has anyone had recent experience of using these?


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PostPosted: Sat Jun 23, 2018 8:54 pm 
Dirt Disciple
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Joined: Sat May 24, 2014 2:59 pm
Posts: 67
Location: Outside looking in .....
Hi i haven't used the Mosso forks.
but i did buy some cheap Aluminum forks of Ebay ,to tide me over on my Rocky
Very harsh ride , i flogged them Asap
I found some new steel forks at car boot sale for 3 pound .
steel is more forgiving..


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PostPosted: Sat Jun 23, 2018 9:10 pm 
Old School Hero
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Joined: Fri Oct 06, 2017 6:37 pm
Posts: 165
Location: Scottish Borders
Hi there, my 17" Al-U-Max, is on original rigid forks and the a-to-c is 400mm, on the button.

My 19" Pro 825 had Judy SL's, from when I got it in 1997 and the a-to-c is 430 mm.

Hope this helps your build.

Regards,

Mike


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PostPosted: Sun Jun 24, 2018 12:03 pm 
Dirt Disciple
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Joined: Sat Jul 11, 2009 7:57 pm
Posts: 14
Location: with the Tykes
fiendish feet wrote:
Hi i haven't used the Mosso forks.
but i did buy some cheap Aluminum forks of Ebay ,to tide me over on my Rocky
Very harsh ride , i flogged them Asap
I found some new steel forks at car boot sale for 3 pound .
steel is more forgiving..

Ah....!! I ordered an ebay Alloy https://www.ebay.co.uk/itm/MTB-ALLOY-RI ... 1438.l2649 last week to tide me over until something better comes along. I had a £20 voucher so basically it was £30. All the dimensions are what I needed but the weight is a bit on the heavy side. We'll see!


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