Stupid chainline
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Stupid chainline
Im sick of worring about this chainline issue, and i need a straight answer(no pun intended). So far, ive realized that my chainline will be off, not by much, and i can't really think of a mechanical reason why this would be that big of a problem. I think it will only be off by 1/8th of an inch. Any geared bike has big chainline "problems", but still works well. So what gives, and how much would i have to spend on fixing this issue? I was thinking of putting spacers between the spider and chainwheel, but i need to compensate for the 1/8th inch.
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I'm pretty sure that it can handle being a little bit off with out many problems, but chain tension becomes more important to dial in. Unless you're way off, though, I wouldn't imagine that it would be a serious problem. And, if you do drop your chain, you'll know why, right?
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Originally Posted by ImprezaDrvr
Unless you're way off, though, I wouldn't imagine that it would be a serious problem. And, if you do drop your chain, you'll know why, right?
fixedgearhead
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Okay, sounds good. I just don't have the funds to make it perfect right now...but i will make it more and more close as i can put more cash into it. I think it will be close enough to where it won't be a major issue. The next thing is to make it fixed gear!!
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If you have a little more room between the chainring and the chainstay, you may try to ad a washer between the chainring and the spiders of the crank. Or, depending on the size of chainring, sandwich another smaller ring (i.e 42 with a 39) between the drive ring and the crank.
Dave
Dave
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What size BB do you have now? How far off is it? If you have 113mm, finding a 110mm for cheap should be easy. If you have 110mm, finding a 107mm should not be too hard either. If you need a 103mm like I did, the only thing I found was a $50 Dura-Ace that is getting hard to find.
Sorry for getting the chainline "stuck in your head".
Sorry for getting the chainline "stuck in your head".
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Originally Posted by BlastRadius
What size BB do you have now? How far off is it? If you have 113mm, finding a 110mm for cheap should be easy. If you have 110mm, finding a 107mm should not be too hard either. If you need a 103mm like I did, the only thing I found was a $50 Dura-Ace that is getting hard to find.
Sorry for getting the chainline "stuck in your head".
Sorry for getting the chainline "stuck in your head".
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And, WTF is up with Presta valves? How do you fill those damn things?
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Originally Posted by trekkie820
And, WTF is up with Presta valves? How do you fill those damn things?
fixedgearhead
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Originally Posted by fixedgearhead
Unscrew the little nut on the end of the valve stem and put your Presta pump head all the way on the stem and pump to your hearts desire of poundage. Then pull the pump head off and screw the little nut all the way back down and install the valve cap and ride away.
fixedgearhead
fixedgearhead
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i noticed in your thread where you posted a photo of your new bike the chainring was on the outside of the drive crank spider. is this how you have it configured? on every fixed gear i have seen using road cranks, the chainring has always needed to be on the inside. that may give you that .125" that you need...
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Originally Posted by isotopesope
i noticed in your thread where you posted a photo of your new bike the chainring was on the outside of the drive crank spider. is this how you have it configured? on every fixed gear i have seen using road cranks, the chainring has always needed to be on the inside. that may give you that .125" that you need...
New tires, BB tool, Presta valve adapters, toe clips and straps.
With anyluck, this will total out to only about 50 bucks.
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Originally Posted by trekkie820
Thats not the chainring that i have now...that crankset the guy kept for himself, and gave me the bike. The crankset i have now is a mountain bike crankset and bottom bracket. Im going to install the MTB bottom bracket(yes, it fits) and use washers on the chainring if needed. If this doesn't give me a straight line, im just not gonna fret over it. So far, my shopping list is this:
New tires, BB tool, Presta valve adapters, toe clips and straps.
With anyluck, this will total out to only about 50 bucks.
New tires, BB tool, Presta valve adapters, toe clips and straps.
With anyluck, this will total out to only about 50 bucks.
fixedgearhead
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Interesting. I just moved my chainring out to the outside of the crank to get the chainline straightened out. Seems to be better now than it was on the inside. In all honesty, though, I think the chain would be perfectly centered where the crank spider arms are.