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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 11-01-09, 11:42 AM   #1
cbinfl
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Change a Downtube Nova chainring ?

From the Downtube website, my new "Nova" is equipped with a " ... Prowheel 170mm with 3/32" 46T chainring". Could I change to a larger front chainring without too much trouble ? I live in Florida, and seem to only use gears 5,6, and 7. Very flat state. I'm not looking to fly, i'm a senior, but every now and then it would be nice to have one more click available. Thanks in advance for any info.
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Old 11-01-09, 12:16 PM   #2
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I'm not familiar with that crank but if it has bolt-on chainrings with a standard (110 mm) bolt circle diameter you could fit a larger chainring and probably need a longer chain. However, if it's an Ashtabula crank with a swaged on chainring, there is nothing you can do to it.

BTW, what is the cassette/freewheel gearing? One with a smaller small cog might be an alternative.
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Old 11-01-09, 12:32 PM   #3
cbinfl
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I will have to look closer. I think it is flat plate with a chain guard attached. Thought it might be easier than the freewheel. It is not a high end bike, but I'm enjoying the h**l out of it. Attached is a photo from their website. Looks like the crank might have to come off ? maybe more than I want to deal with. Thanks for the info. I's been awhile since I thought about this stuff.
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