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help figuring out maximum front chainring size

Old 10-26-22, 09:20 AM
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26inchforlife
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help figuring out maximum front chainring size

I want to upgrade my bike to a 1x11, with a max 36t rear cassette. I am looking to run the sensah empire pro long rear derailleur, and an 11-36t cassette. What is the maximum size front chainring i can use?
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Old 10-26-22, 09:32 AM
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What's on the rear has no bearing on chainring size.

So feel free to use whatever you want in front. However, you might need to buy and splice 2 chains, because the typical 112 links will likely be too short.
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Old 10-26-22, 09:35 AM
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What FBinNY says is true. However only for 1x. I only point this out so others that don't pick up on the fact the conversation is about 1x don't think this is true for cranks with multiple rings.
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Old 10-26-22, 09:39 AM
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I would agree that you can go as big as you want for the chainring. However, at some point in size the ring may hit the chain stay as it flares out from the BB to the dropout. Maybe that can be worked around with a BB that has a wider spindle. But then I guess alignment would be out of whack. So I guess the chain stay limits the size. — Dan
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Old 10-26-22, 07:34 PM
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Originally Posted by Iride01 View Post
What FBinNY says is true. However only for 1x.
....
.
Yes. I considered adding references to FD, and RD chain take up considerations, but opted not to since that didn't apply to the issue at hand.
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Old 10-26-22, 07:59 PM
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Cool story. The maximum front chainring is going to be the biggest toothed round item that will fit on your bike. It is not determined by the info you have provided but what the bike can handle. Do you know what you are trying to accomplish what sort of gearing you are looking for in the ratios?
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Old 10-26-22, 08:08 PM
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Question for the OP ...... and a suggestion.

You asked for info re. the largest possible ring, and got relevant answers.

BUT

I'm a bit curious about the why, considering that going to a larger ring works to negate the effect of going to a larger cassette.

As long as you can meet your desired high gear, you could do better with a smaller ring and cassette, ending with a similar low, and tighter mid-range spacing.
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Old 10-26-22, 09:44 PM
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Depending on the bolt circle diameter of the crank, how hard you're willing to look, and how much you're willing to pay, I'd guess that somewhere in the mid-60s is about as big as you can get.

Unless you've got a buddy with a machine shop... in which case, the ground's the limit.

--Shannon
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