Spacers for older 6-bolt disc hubs?
- Thread starter Ziggy
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But there shouldn't be any extra shear force on the bolts (ie below the head, as Mr Bomb pointed out), as the friction between the spacer / hub / disc should prevent any movement...
It's a Rolf Dolomite on a 2000 Marzocchi fork, with a Magura Julie (2003ish IIRC - big rotor already!)... I've used the fork with a different wheel before, so despite the lack of 'proper' investigation, I'm pretty certain it's the wheel that's at fault! I've found one reference to a difference in the iso standard, but nothing definitive... :?
It's a Rolf Dolomite on a 2000 Marzocchi fork, with a Magura Julie (2003ish IIRC - big rotor already!)... I've used the fork with a different wheel before, so despite the lack of 'proper' investigation, I'm pretty certain it's the wheel that's at fault! I've found one reference to a difference in the iso standard, but nothing definitive... :?
Here's the link... http://tandem-fahren.de/Mitglieder/Chri ... #standards
& the link to the diag on the magura site is dead!
Thanks for the help btw guys
& the link to the diag on the magura site is dead!
Thanks for the help btw guys
cherrybomb
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Max P":111mvunw said:cherrybomb":111mvunw said:Max P":111mvunw said:
There's no more strain on the bolts with a 5mm spacer than there would be with any width spacer as long as they're made properly. As long as the spacer cant rotate on the hub (holes too big where bolts fit etc.) then there is a shear force at the bolt head and that's about it.
I don't know - I have a bit of interest in this subject (as can be seen by my homepage) - the further the point of engagement of the bolts to the threaded hub (ie the more spacers you add) the greater the twisting forces acting on the bolts as the forces acting on the disc are further away. :?
Sorry. I understand where you're coming from but that's just not right. As long as the spacer is made to the correct tolerances and the contact surfaces are true then there will be no extra twisting force applied to the bolts (as long as they are torqued correctly).
Ziggy.........my advice would be to try washer stacks to get everything lining up correctly, measure the height of the stack and get some nifty little spacers machined up. Nice close clearance fit on the bolt and as large an external diameter as you can get away with.
cherrybomb
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Have you tried giving Hope a ring and asking them.
They're usually good with this kind of thing and if there are two standards I'd be surprised if they've not come up with a solution before now.
They're usually good with this kind of thing and if there are two standards I'd be surprised if they've not come up with a solution before now.
Max P":6dhy7i3j said:Hmmm, well I'm not sure but if you need the 6 bolt ISO spacers in 1mm or 2 mm I have them!
Cool
How much dya want for them? I'm guessing I'll need 5mm but I obviously need to measure up properly first. Could really do with finding the diags that used to be on the Magura site! Methinks a quick e-mail to them (& hope) is in order...Similar threads
