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Gearing question

Old 06-01-20, 03:56 PM
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bonsai171
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Gearing question

Is there any advantage to running a larger chainring?

My current gearing is 45X16 (73.9 gi).

48X17 is very similar at 74.16 gi.

Also, a stiffer crank should make a higher gearing (more gi) easier to pedal, right?

Dave
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Old 06-01-20, 05:57 PM
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Not really any advantage if the gear inches are similar unless you just want a new crankset.

A stiffer crank won't really make it that much easier to pedal. A higher quality bottom bracket might.

What kind of bike / crankset do you have?
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Old 06-01-20, 06:39 PM
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Advantage of using larger chainring and sprocket: lasts longer because wear is spread over a larger number of teeth.

Disadvantage of using larger chainring and sprocket: weighs slightly more than smaller components.
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Old 06-01-20, 07:26 PM
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Originally Posted by stevel610 View Post
Not really any advantage if the gear inches are similar unless you just want a new crankset.

A stiffer crank won't really make it that much easier to pedal. A higher quality bottom bracket might.

What kind of bike / crankset do you have?
Currently running a Kilo TT with Sugino VP130 road cranks. I need to buy another crankset to build up a single speed for my Dad (going to put the Sugino on the SS) so I figure it's time for new crankset. A lot of the ones I've seen have. 46-49t chainring, which made me wonder if I should run something bigger.
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Old 06-02-20, 08:24 AM
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Ok. In that case putting on a larger cog would make sense to keep the same gear inches.

Good luck with the build!
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Old 06-02-20, 09:02 AM
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Originally Posted by bonsai171 View Post
Is there any advantage to running a larger chainring?

My current gearing is 45X16 (73.9 gi).

48X17 is very similar at 74.16 gi.

Dave
45/16 is what I use, although the effective gearing is lower due to smaller wheels. If I had the chainstay clearance, I'd be on 48/17!
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