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 Post subject: Hope No6 disk size?
PostPosted: Sun Sep 02, 2012 1:17 am 
Dirt Disciple

Joined: Sun Aug 05, 2012 10:18 pm
Posts: 48
Hi just purchased a set of Hope 4pot (no6 caliper) brakes for my Orange Sub5 rebuild, chap was using them with a 203mm and 180mm disks. Is this the correct size? as sounds a bit odd. Looking at Hope website in the tech section they look like the E4 but mounts looked more like the M4 any ideas on what they are?

Thanks


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 Post subject:
PostPosted: Sun Sep 02, 2012 2:07 am 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Thu Feb 24, 2011 1:15 am
Posts: 1887
Location: Getting fitter, I will beat the Surrey Hills....
I had a similar question a while back with some Hope brakes. I emailed Hope and they confirmed rotor sizes in a day! They are really good at getting back to people.

No doubt someone will be along shortly with an answer for you though.


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 Post subject:
PostPosted: Sun Sep 02, 2012 7:30 am 
Retro Guru
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Joined: Mon Jan 02, 2012 10:04 pm
Posts: 660
Location: cornwall
No6 is boxxer mount IIRC and the calipers look like the little XC4's to me.
E4 and M4 look essentially the same, at least in size and DH4 are bigger again.
I had a DH4 setup with a no6 front caliper, I never used it, but it came with a 203 front and a 180 rear from a trusted source, so I assume this to be correct.


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 Post subject:
PostPosted: Sun Sep 02, 2012 1:14 pm 
Dirt Disciple

Joined: Sun Aug 05, 2012 10:18 pm
Posts: 48
Thanks for replies, found a couple of pictures on the interweb the one marked "M4 6" is boxxer mount caliper and the one just marked "6" is an E4 caliper. Both no6 but mounts and spacing look very different, still confused!


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 Post subject:
PostPosted: Sun Sep 02, 2012 8:26 pm 
MacRetro rider
MacRetro rider

Joined: Thu Jul 30, 2009 4:56 pm
Posts: 2473
Location: A Fifer furth o' the Kingdom
They are not XC4s, look more like Enduro 4s with the closed system Pro levers. The Original M4s look similar but use a closed system Mini lever.
As has been said they are Boxxer mount calipers but it looks to me that they are both Boxxer mount calipers. I think that the Boxxer mount is only for the front as they have built in spacers where they bolt on to fork, wouldn't think they'd fit on back due to in-built spacers.

These links might help with IDing disc sizes, calipers and levers.

http://web.archive.org/web/200502090101 ... b_fitt.htm

http://web.archive.org/web/200406051054 ... _index.htm

As you can see there isn't a No6 caliper in list of rears, so if you have 2 No6s it could be you have 2 front calipers.


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 Post subject:
PostPosted: Sun Sep 02, 2012 9:09 pm 
Dirt Disciple

Joined: Sun Aug 05, 2012 10:18 pm
Posts: 48
If both boxxer mounts would this work in reverse?

http://www.wiggle.co.uk/a2z-adapter-boxxer-to-is-203mm/

Other than that guess will need to machine something up


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 Post subject:
PostPosted: Sun Sep 02, 2012 9:28 pm 
MacRetro rider
MacRetro rider

Joined: Thu Jul 30, 2009 4:56 pm
Posts: 2473
Location: A Fifer furth o' the Kingdom
I think that Boxxer adapter mount is meant to be used with an ordinary caliper that is not like a Hope No6 with it's in-built spacers. The adapter is much thicker than a normal adapter that you'd use to fit a bigger disc.

As to machining, I thought about getting a Hope Boxxer front brake off someone on here as it wasn't selling. Was just going to carefully reduce the in-built spacers in size to that of normal caliper using a file and digital vernier caliper. Didn't in the end as I got the correct brakes elsewhere.


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 Post subject:
PostPosted: Sun Sep 02, 2012 10:00 pm 
Dirt Disciple

Joined: Sun Aug 05, 2012 10:18 pm
Posts: 48
old_coyote_pedaller wrote:
Was just going to carefully reduce the in-built spacers in size to that of normal caliper using a file and digital vernier caliper.


Think thats going to be best solution as have access to machine tools, thanks


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 Post subject:
PostPosted: Sun Sep 02, 2012 11:43 pm 
Gold Trader / rb Rider / Special
Gold Trader / rb Rider / Special
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Joined: Mon Aug 31, 2009 12:26 am
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Location: Rurally close.
I have a n0.8 caliper half (m4) which i believed to be 203mm boxxer mount! ?


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 Post subject:
PostPosted: Tue Sep 04, 2012 10:43 pm 
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 18215
Location: Sunny Glasgow
cyfa2809 wrote:
I have a n0.8 caliper half (m4) which i believed to be 203mm boxxer mount! ?


Well there you go,you were totally wrong :P

No8 C2 front = 205
No8 M4 rear = 185mm


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