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 Post subject: XC Pro Axle swap - argh!
PostPosted: Sat Feb 17, 2018 5:34 pm 
Dirt Disciple
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Joined: Mon Jan 29, 2018 7:15 pm
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Location: Sussex, UK and Andorra
Hi all,

Well, just took delivery of some NOS XC Pro 7s hubs, only to discover they are 130Mm spacing on the rear...they took 2 weeks to come from the US, so I can’t be arsed to send them back.

Obviously they are not yet built, so I guess it might be simplest to fit a longer axle, has anyone done this? Any advice would be appreciated...

Suspect I need a 146 axle, but I don’t know what the thread pitch is; 10x1? And then a 2.5mm spacer each end?

Anyone happen to have one kicking around?

I have a vague memory from about 1991 that there was something fiddly swapping an axle out on these due to the cartridge bearings, but could be mistaken....


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 Post subject: Re:
PostPosted: Sat Feb 17, 2018 5:45 pm 
retrobike rider / Gold Trader
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Location: Notts, UK
How long is the axle? Might be simpler to just shuffle it across a couple of mm and fit a 5mm spacer to the non drive side. You only need a couple of mm to sit in each dropout.

Whichever way you do it, you only want to add the spacer to the non drive side so the chain line is correct.


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PostPosted: Sat Feb 17, 2018 5:46 pm 
Old School Grand Master
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Location: peak district
Is this for the Explosif? have you tried the hub in the frame yet? a 135 is a tight fit in my frame and have thought about running a 130 before.

If you dont sort it, which im sure you will, i might have the 130 axle off you as i need one for another frame :)

Mark


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PostPosted: Sat Feb 17, 2018 8:24 pm 
Old School Grand Master
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Location: The Royal Society of Insobriety
Standard Shimano spec axle, they come apart easily.


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 Post subject: Re: Re:
PostPosted: Sun Feb 18, 2018 12:07 am 
Dirt Disciple
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Location: Sussex, UK and Andorra
iveto1983 wrote:
How long is the axle? Might be simpler to just shuffle it across a couple of mm and fit a 5mm spacer to the non drive side. You only need a couple of mm to sit in each dropout.

Whichever way you do it, you only want to add the spacer to the non drive side so the chain line is correct.


Not long enough - it’s far narrower than the drop outs, it would barely engage in the frame unfortunately...

Wouldn’t having it off-centred mean it would end up dished weirdly?


Last edited by Singletrack74 on Sun Feb 18, 2018 12:16 am, edited 1 time in total.

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PostPosted: Sun Feb 18, 2018 12:10 am 
Dirt Disciple
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Joined: Mon Jan 29, 2018 7:15 pm
Posts: 92
Location: Sussex, UK and Andorra
mkone wrote:
Is this for the Explosif? have you tried the hub in the frame yet? a 135 is a tight fit in my frame and have thought about running a 130 before.

If you dont sort it, which im sure you will, i might have the 130 axle off you as i need one for another frame :)

Mark


Yep, but I measured the dropouts with my shiny new vernier calliper and it definitely ought to be a 146...


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PostPosted: Sun Feb 18, 2018 12:14 am 
Dirt Disciple
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Joined: Mon Jan 29, 2018 7:15 pm
Posts: 92
Location: Sussex, UK and Andorra
Rod_Saetan wrote:
Standard Shimano spec axle, they come apart easily.


Aren’t the bearings on XC Pro pressfitted into the hub body? I seem to recall they got destroyed by a shop taking them out back in the day?


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 Post subject: Re:
PostPosted: Sun Feb 18, 2018 12:56 am 
Gold Trader
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Joined: Fri Jan 23, 2009 2:30 pm
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Xc pro do have sealed cartridge bearings. Must have been a poor shop to have destroyed a hub.

You might get away with juggling things around and adding a spacer. You could get away with this on m900 hubs iirc. If you have a complete hub, I think I still have an xc something other than pro rear hub in 135. You'd just need to swap over the axle and spacers, keeping your xc pro cone bits and voila.


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PostPosted: Sun Feb 18, 2018 9:17 am 
Retro Guru

Joined: Sat Dec 03, 2005 11:16 pm
Posts: 357
Location: FOD uk
Rod_Saetan wrote:
Standard Shimano spec axle, they come apart easily.


This.

Just swap the axles, but include a 5mm spacer on the nd side. Although the bearings are pressed into the hub shell the axle is a standard 10x1mm threaded item, all you need are some cone spanners to do the job.


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PostPosted: Sun Feb 18, 2018 12:09 pm 
retrobike rider
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Location: Yorkshire, England
Singletrack74 wrote:
mkone wrote:
Is this for the Explosif? have you tried the hub in the frame yet? a 135 is a tight fit in my frame and have thought about running a 130 before.

If you dont sort it, which im sure you will, i might have the 130 axle off you as i need one for another frame :)

Mark


Yep, but I measured the dropouts with my shiny new vernier calliper and it definitely ought to be a 146...


Lucky you had just bought them :-)


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