On Dec 4, 6:37*pm, crowizcom wrote:
i got giant fusion dx bike, such ashttp://www.giant-bicycles.com/nl-be/bikes/lifestyle/967/28195/zoom/?c...

its second hand but without many signs of use, ie like new!

however, brakes are very weak, and if i apply excessive force, there
comes metallic sound ..

?

The brakes are weak because they're dry, and they're loud for the same
reason. You must buy a tube of special Shimano Roller Brake Grease and
squeeze in some through the grease port behind the small rubber plug
on the outside of the roller brake. Don't use any other grease.

Andre Jute
The rest is magic hidden in the hub.
For rare hub gear bikes, visit Jute on Bicycles at
http://www.audio-talk.co.uk/fiultra/...20CYCLING.html