Woo, fixie's finished!!! But I have a problem...
02-26-04, 01:38 PM
#1
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Bikes: Orbea Enol roadie, Fly Micromachine BMX, Fort Track fixed
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Woo, fixie's finished!!! But I have a problem...
Just put the final touches on her this afternoon, so pleased with myself 
But it's too dark and cold to go for a ride, so I'll have to wait 'til tomorrow 
I'll post some pics when my Mum brings the digicam back from New Zealand.
But I did find something rather odd when it was upsidedown on my workbench, when I was setting the chain tension: if I hand cranked it really fast, then let go of the pedal, as the wheel slowed down, the chain would wobble, almost resonate. Is this normal? I tried it with the chain just right, too loose and too tight, it still happened. The chainline is spot on; the cogs are both 3/16ths, the chain is 1/8th. There is a slight tight spot, but nothing major. It's never happened on my BMX, I guess it's a fixed gear thing. I thought maybe it was because the pedals were unloaded, but it's hard to put force on them with your hands and still hold the bike upright.
But it's too dark and cold to go for a ride, so I'll have to wait 'til tomorrow I'll post some pics when my Mum brings the digicam back from New Zealand.But I did find something rather odd when it was upsidedown on my workbench, when I was setting the chain tension: if I hand cranked it really fast, then let go of the pedal, as the wheel slowed down, the chain would wobble, almost resonate. Is this normal? I tried it with the chain just right, too loose and too tight, it still happened. The chainline is spot on; the cogs are both 3/16ths, the chain is 1/8th. There is a slight tight spot, but nothing major. It's never happened on my BMX, I guess it's a fixed gear thing. I thought maybe it was because the pedals were unloaded, but it's hard to put force on them with your hands and still hold the bike upright.
02-26-04, 02:48 PM
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Almost definatly caused by the unloaded pedals. No problem there
02-26-04, 03:41 PM
#3
hello
Your chainring/crankspider is not concentric. You can try remounting your chainring in different holes on the crank to see if there's any improvement. This is normal to a small degree. I wouldn't really worry about it. I believe Sheldon has instructions on how to deal with this.
George
George
Last edited by roadfix; 02-26-04 at 03:48 PM.
