Spacers for older 6-bolt disc hubs?

[Ziggy]

I've gone and bought a disc brake front wheel, without realising that all 6-bolt iso fittings were not born equal!
It transpires that early (1999 I think? With the current standard arriving in 2000) hubs mount the disc too far away from the caliper, by approx 5 or 6mm. Now I'm sure I could get a spacer ring made up, but I'd need to know the exact spec needed...

Can anyone shed any light on the subject, or know where I can get such a thing? Cheers

 

[Pip]

Hope make them. Pretty sure chain reaction still sell them. I dont think they were as thick as 5mm though.

Pip

 

[Ziggy]

Had a look & yep, they're only 1mm or 2mm... Thanks though!

 

[Max P]

You can stack them of couse - if you need any I have lots!

 

[Ziggy]

You can stack them of couse - if you need any I have lots!

A good point...

So does anyone know the exact size of spacer(s) I'll need?

 

[Max P]

TBH I would not want to space it out more than 2mm (3 max), too much strain on the bolts. Can't you spacer the caliper out too?

 

[Ziggy]

TBH I would not want to space it out more than 2mm (3 max), too much strain on the bolts. Can't you spacer the caliper out too?

Potentially, but not by much without it hitting the spokes... :?
My fault for buying tat off eBay without doing my research I guess - never heard of 'another' 6-bolt iso standard though :roll:

 

[cherrybomb]

TBH I would not want to space it out more than 2mm (3 max), too much strain on the bolts. Can't you spacer the caliper out too?

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.

 

[P20]

It varied on frame/hub and brake combos. The Hopes were the main culprit as the brakes were to bulky. You might have more luck with a larger rotor to gain some more clearance

 

[Max P]

TBH I would not want to space it out more than 2mm (3 max), too much strain on the bolts. Can't you spacer the caliper out too?

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. :?