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PostPosted: Tue Aug 20, 2013 5:32 pm 
Gold Trader
Gold Trader
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Joined: Thu Aug 12, 2010 7:04 am
Posts: 2028
Location: Germany
Hi

I just bought the girlfriend a secondhand but pratically new Diament Topas bike with Nexus shimano roller brakes
I have never seen these brakes before and they seem to have a problem?
When you brake it feels like the headset is loose but it is actuall the brake that seems to wobble???
Has anyone any advice on how to fix this
Brakes are the 2011 Nexus model

any help appriciated


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PostPosted: Tue Aug 20, 2013 5:49 pm 
Dirt Disciple
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Joined: Tue Nov 20, 2012 6:41 pm
Posts: 53
Location: South West
I think they have a torque limiter on the front brake, maybe its that that is causing it?


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PostPosted: Tue Aug 20, 2013 8:47 pm 
retrobike rider
retrobike rider
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Joined: Tue Jan 29, 2008 11:04 pm
Posts: 1802
Location: A wretched hive of scum and villainy...
That knock is completely normal for a Roller brake. It's part of the braking mechanism, rather than the torque-limiter.
Look in the notes of the Shimano technical docs.
Quote:
If you apply the front Inter-M brake strongly while the bicycle is
stopped and then shake the wheel, you will notice that there is a small
amount of play in the brakes. This is normal, and will not cause any
problems at all while riding.

All the best,


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PostPosted: Thu Aug 22, 2013 7:52 am 
Gold Trader
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Joined: Thu Aug 12, 2010 7:04 am
Posts: 2028
Location: Germany
Hi

Thanks for the Info
Will take it for a spin and see how it rides on the road


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