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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Chain Rub?
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Author Topic: Chain Rub?  (Read 2178 times)

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telelogic

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Chain Rub?
« on: February 25, 2010, 05:52 PM »
What is the procedure for stopping my chain rubbing on my seat stays?

Offline QUADROPHENIA

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Re: Chain Rub?
« Reply #1 on: February 25, 2010, 05:54 PM »


 :wtf:

what bikes that on ?

telelogic

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Re: Chain Rub?
« Reply #2 on: February 25, 2010, 05:59 PM »
My new race Kuwa race bike.

Offline QUADROPHENIA

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Re: Chain Rub?
« Reply #3 on: February 25, 2010, 06:01 PM »


bet horsehead built it thats why

telelogic

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Re: Chain Rub?
« Reply #4 on: February 25, 2010, 06:05 PM »
That's a massive help, Thanks!

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Re: Chain Rub?
« Reply #5 on: February 25, 2010, 06:07 PM »


no worries we are here to help






























get some pics up so we can looky

Offline Gary72

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Re: Chain Rub?
« Reply #6 on: February 25, 2010, 06:49 PM »
What size freewheel are you running? How far forward is the wheel?Are you running a skinny chain?I know Crooch had similar problems with a Chris King hub and a half-link chain.
Like Pete said get some pics

trasher

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Re: Chain Rub?
« Reply #7 on: February 25, 2010, 09:34 PM »
tighten the chain up  :-\

telelogic

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Re: Chain Rub?
« Reply #8 on: February 26, 2010, 12:24 AM »
It's a modern race bike, so the gearing is 16/44.

it looks like if I took a link out of the chain and shoved the wheel forward it might solve it, but that would be pretty slammed!

Offline MartyC

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Re: Chain Rub?
« Reply #9 on: February 26, 2010, 08:31 AM »
Washers to push the frame out from the sprocket  :daumenhoch:


Better to crash and burn than fade away

telelogic

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Re: Chain Rub?
« Reply #10 on: February 26, 2010, 09:12 AM »
Will that be OK with an alloy frame?

Offline MartyC

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Re: Chain Rub?
« Reply #11 on: February 26, 2010, 09:33 AM »
Will that be OK with an alloy frame?

Should be so long as you don't over stress the frame, a small amount should be OK  :daumenhoch:  Is there any play between the cones and the inside of the croput if the wheel nuts are loose?


Better to crash and burn than fade away

telelogic

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Re: Chain Rub?
« Reply #12 on: February 26, 2010, 09:38 AM »
croput?

HEYWOOD BMX

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Re: Chain Rub?
« Reply #13 on: February 26, 2010, 09:44 AM »
 Washers seem to be the sensible option,or you could see if a 43t ring would give you a bit more space between the chain & frame.One of those stick on neoprene/carbon patches on the inside of the stay would help to prevent any further damage.

telelogic

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Re: Chain Rub?
« Reply #14 on: February 26, 2010, 09:50 AM »
I've already stuck a patch on the seatstay to prevent any chipping.

Trouble is, It rub's on that like a bitch :knuppel2:

Offline Dark Diggler

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Re: Chain Rub?
« Reply #15 on: February 26, 2010, 09:52 AM »
If its a cassette hub, take off the drive sprocket and move the spacers round so the cog is nearer the hub, if there is no spacers then usually flipping the sprocket will re space it nearer , this will allow the chain to clear the stays, also make sure your front sprocket is spaced correctly or your chain line will be fruity :daumenhoch:
Whats the matter Kid, don't ya like clowns? Don't we make you laugh? Aint we fukkin funny?

telelogic

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Re: Chain Rub?
« Reply #16 on: February 26, 2010, 10:01 AM »
I'm sure the external BB isn't helping matters!

that must hold the sprocket a good centimeter further out than a normal BB?

Offline Dark Diggler

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Re: Chain Rub?
« Reply #17 on: February 26, 2010, 10:08 AM »
Are there any spacers on the drive side of the BB? (between the external cup and the frame)

Get some pics up
Whats the matter Kid, don't ya like clowns? Don't we make you laugh? Aint we fukkin funny?

Offline MartyC

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Re: Chain Rub?
« Reply #18 on: February 26, 2010, 04:29 PM »
I should have asked this before, so just to clarify, is the chain rubbing on the Chain Stay or the Seat Stay?  The Chain Stay being the one that runs from the bb  to the dropout and the Seat Stay from the dropout to the seat tube?

If the Chain stay; is it rubbing at the dropout end ot the bb end?  Ifthe bb end sounds like the chain alignment is out of whack and spacers on the bb and the hub might be needed.

Pic would be helpful  :daumenhoch:


Better to crash and burn than fade away

telelogic

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Re: Chain Rub?
« Reply #19 on: February 26, 2010, 05:41 PM »
Rubbing on the seat stay.

About three inches from the hub.

HEYWOOD BMX

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Re: Chain Rub?
« Reply #20 on: February 26, 2010, 05:45 PM »
PM Kuwahero,sure he had one of these,maybe he can help?

Offline Gary72

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Re: Chain Rub?
« Reply #21 on: February 26, 2010, 08:55 PM »
39-14

telelogic

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Re: Chain Rub?
« Reply #22 on: March 03, 2010, 10:30 AM »
will 39-14 have the same feel as 44-16?

HEYWOOD BMX

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Re: Chain Rub?
« Reply #23 on: March 03, 2010, 10:36 AM »
will 39-14 have the same feel as 44-16?

 Pretty much.Have a look at this,might help.

http://www.bmxultra.com/downloads/flash/gearchart.htm

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