handsome joe
New Member
Every time i initially apply my front v-brakes i get a scraping sound. By the way i have just replaced the brake pads as i thought it could be them but the sound is still there. Are they poor quality wheels?
Apply brakes....scraping sound from rims.
- Thread starter handsome joe
- Start date
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andrew_s
Legendary Member
- Location
- Gloucester
Not Shimano brake pads by any chance?
handsome joe
New Member
Cheers for all the advice. Had a closer look again tonight and found pad incorrectly contacting the rim. The pads are slightly tilted at an angle. The front of the pad is coming into contact first if you get what i mean. I had a little wiggle and everything seems ok. Talking of dirty rims. I've got salmon pink kool stops and was amazed at how dirty they are after a week of use. Makes me wonder about all the crap i breath in everyday!
summerdays
Cycling in the sun
- Location
- Bristol
Tynan said:
No - most of it is off your wheel.... I have disk brakes on one bike and v's on the other... the difference is huge in how dirty the rims get.
handsome joe said:
The blocks are supposed to have a "toe-in". They contact at the trailing end first. The application of pressure pulls the brake mechanism into square - or close to it.
No "toe-in" = squeal. The whole face of the block contacts simultaneously and the block judders at a high pitch because the leading edge is being dragged onto the rim's brake track.
The usual "Toe-in" is 3mm over a 35mm long block.
Every time the blocks rub on the rim, they wear. Even a pink block will give off dark grey 'squidink' if there is moisture around.
I prefer the blocks to wear in preference to the rim. What I don't like is the mess on the rim, especially when it rains and the black ooze trickles down the forks and seatstays.
vernon
Harder than Ronnie Pickering
- Location
- Meanwood, Leeds
handsome joe said:
I'd not worry about the crap that you breath in. The black/grey scog that you find on your blocks and rims are the rims themselves albeit microscopic particles of rim.
jay clock
Massive member
- Location
- Hampshire UK
Most of the dirt is microscopics bits of rim.
summerdays
Cycling in the sun
- Location
- Bristol
Tynan said:
Yes they do - its called metal and rubber
jay clock said:
+1
Honestly ... you should see the difference between the two rims of the bikes. Touching the wheel of the bike with disk brakes is so much nicer as you don't automatically get covered in that grey stuff. Yes it still picks up stuff off the road but not to the same quantity and the particle size is probably bigger?.
e-rider
Banned member
- Location
- South West
I've just fitted a new pair of wheels, so I thought it would be a good idea to fit new pads too.
Mine are also quite loud and make a sort of scraping sound. Both the rims and blocks are brand new and clean. I just thought it must be either the new rims or pads and that it should go pretty soon. Anyway, 150 miles later and it's still there!!!
Mine are also quite loud and make a sort of scraping sound. Both the rims and blocks are brand new and clean. I just thought it must be either the new rims or pads and that it should go pretty soon. Anyway, 150 miles later and it's still there!!!
