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Conference noted::bicycle

Title: Bicycling
Notice:Bicycling for Fun
Moderator:JAMIN::WASSER
Created:Mon Apr 14 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3214
Total number of notes:31946

2909.0. "Something loose inside Cannondale frame" by EXPERI::MENTAL (Got me a caffeine jones!) Wed Feb 08 1995 08:51


	My wife just bought a new Cannondale M900. As we were adding 
	bar-ends, pedals, etc., I noticed that there seems to be something
	loose *inside* one of the frame tubes. If I hold the bike nose-down, 
	and then pick up the front end, it can be heard tinkling through 
	one of the top tubes (it's a Delta V frame).

	Anyybody heard of anything like this? We're not too worried about it, 
	but it seems sort of odd. 

	Thanks 
	/ken		

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2909.1Top Tube Cable Routing?MKOTS3::TCC050::LARSONWed Feb 08 1995 12:1410
Ken,

It may be that the top tube has "internal cable routing".  I have a Trek 
road frame that has an annoying metalic rattle in the top tube, and it is 
the rear brake cable banging against the aluminum top tube.  There is 
nothing you can do about it (that I know of).

Mike


2909.2NOVA::FISHERnow |a|n|a|l|o|g|Thu Feb 09 1995 03:589
    it sounds to me like a metal burr that broke off one of the
    tubing pieces during manufacture -- like if the tubes aren't
    nicely polished before assembly and then one of the rough pieces
    gets broken off during assembly and becomes forever entombed
    within the frame.  Evidence of minor sloppiness in assembly
    but nothing to worry about unless you're trying to shave
    milligrams.
    
    ed
2909.3BASLG1::BURNLEYThu Feb 09 1995 04:165
     Cant you shake it out via the Seat Tube? 
    
    I Know that some Pro-Flex's had an extra tube "glued?" in the Seat tube
    at their bottom bracket to give extra strength. There have been reports
    in the UK of this coming loose and sliding around.  
2909.4Internal Cable Fix?BRAT::JASINSKIThu Feb 09 1995 07:4316
    Re: .1
    
    I also have a Trek with internal cable routing.  The rattling that you
    described only happens on bumpy surfaces (which describes most New
    England roads).  I've heard of people solving this problem by covering
    the brake cable with a length of narrow foam pipe insulation, run
    through the seat tube.
    
    I looked for some of this insulation at Home Depot, but the narrowest
    they had was a 3/4" inside diameter.  They suggested I try a store that
    specializes in refrigeration supplies.  When I find some, I'll let you
    know how it works out.
    
    
    
    Steve
2909.5can probably shake it outEXPERI::MENTALGot me a caffeine jones!Thu Feb 09 1995 09:3416
	Well, I looked at it again last night... It does sound like a small
	metal burr... It's in the top tube, and slides all the way from the 
	head tube back to the seat tube. I pulled out the seat post, and 
	there is a hole at the top-tube/seat-tube joint, so I can probably 
	shake it out of there. 

	The bike only weighs about 22 lbs, so every milligram we can
	shave off will help 8^). 

	Thanks for the help - now we just need to get out and *ride* this
	weekend. 

	/ken


2909.6NOVA::FISHERnow |a|n|a|l|o|g|Thu Feb 09 1995 09:423
    yeah, heck 22 lbs is 10 million milligrams.
    
    ed
2909.7and a nanosecond each second is a second in 32 yearsMOVIES::WIDDOWSONBrought to you from an F64 diskThu Feb 09 1995 12:182
    Just as well it's not titanium, then removing the burr would mean less
    of a gain.
2909.8My rattle is from the cage mount hole plug(s)MUZICK::MISKINISFri Feb 10 1995 14:028
Hi,

	Did you install a water bottle cage?  My Peugeot frame had
	little plastic caps filling the threaded holes for a cage.
	When these were removed (broken off) a piece went inside the
	frame (on both), and I have had a rattle ever since.

_John_
2909.9Service ?!?JGO::GERRITSENTue Feb 14 1995 07:435
    If I bought a new bike and heard a strange noise/rattle inside it, I
    would go back to the dealer. It should be his service to clear this.
    Or did this occur after you added the bar-ends etc ?
                        
    Ray
2909.10EXPERI::MENTALGot me a caffeine jones!Wed May 10 1995 16:029
	Forgot all about this note...

	The rattle seems to be gone - I shook the bike around with the 
	seatpost removed, and that must have gotten rid of whatever was in 
	there. The bike's been ridden hard with no problems so far. 

	/ken