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PostPosted: Mon Jan 08, 2007 10:18 pm 
East Midlands AEC
East Midlands AEC
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Joined: Thu Oct 05, 2006 7:45 pm
Posts: 15067
Location: Derby, UK
I just bought a rear disc brake, a Hope Mini, the seller stated it's a caliper number 3 - what does this mean? I notice on MTBR reviews that they come in number 3 and number 5 - might I be getting something that doesn't fit?


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PostPosted: Mon Jan 08, 2007 10:40 pm 
Retro Guru

Joined: Mon Aug 21, 2006 12:10 pm
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Location: High Peak
A #5 caliper is 145mm if it's on the rear and 165mm on the front.
#3 is 165mm rear and 185mm front.

More info here


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PostPosted: Mon Jan 08, 2007 10:41 pm 
East Midlands AEC
East Midlands AEC
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And if I have a 155mm rear rotor will the number 3 fit? I already have the rotor you see. The rotor that comes with the brake is 6 bolt and mine is 5 so incompatible from that point of view. I just hope the caliper will work with 155!


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PostPosted: Mon Jan 08, 2007 10:48 pm 
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Joined: Mon Aug 21, 2006 12:10 pm
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155mm was a Pace fork only size wasn't it?

It'd work from the point of view that the pads will grab a bit of the rotor but it won't be very much. I guess it depends how much you want your brakes to work :shock:


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PostPosted: Mon Jan 08, 2007 10:50 pm 
East Midlands AEC
East Midlands AEC
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It's on the rear... it's this disc:

http://www.retrobike.co.uk/forum/viewtopic.php?t=6056


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PostPosted: Mon Jan 08, 2007 11:03 pm 
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Joined: Mon Aug 21, 2006 12:10 pm
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Maybe the universal mount also used a 155mm rotor?


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PostPosted: Fri Feb 09, 2007 6:48 pm 
Dirt Disciple
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Joined: Thu Nov 02, 2006 12:31 pm
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Location: Bristol
a #1 caliper at the rear runs a 155mm rotor....


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