|   I'd like to change my chainring size to crazy lengths... | MM
Jun 16, 2002 8:05 AM | | The current largest chainring on my bike is 44T. I'd like to put on a new one that would have the largest number of teeth I can possibly have. (For riding on-road.) What problems with shifting would I encounter doing this? I'm guessing I'd have to move the deraieur way up to clear the chainring when it shifts up. I'll also probably lose the capability to use first gear when it's set up like this. Is there a point where the chain wouldn't even jump the gap between the second and third gear? |
| Also, how do I determine my chainring size? nm | MM
Jun 16, 2002 8:07 AM | | |
| issues you'll encounter | a friend
Jun 17, 2002 7:46 AM | | You have to consider these things:
the bolt circle diameter of your cranks
front derailleur throw
chainstay clearance
You have to buy a chainring that matches your BCD of your current cranks. Not a big deal really.
Most front derailleurs can handle gaps of up to 22 teeth or so (the difference between your small ring and your big ring - if your small ring is 22 teeth, then your derailleur can go up to 44 teeth). If you want full range of gears, you'll need to switch small rings as well for better shifting.
The biggest issue is chainstay clearance. Most MTB frames have a wider space between chainstays to allow for wider tires. This makes for less space on the other side for a really big chainring. Most likely, you won't be able to fit anything bigger than a 46 or 48 tooth ring. |
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