In case anyone is modifying a bicycle loose screws bicycle small parts has chainrings up to 60t IN 110 MM BOLT CIRCLE DIAMETER. This is useful if you are try ing to get a higher gear especially on a small wheel bicycle.

60x11 all the way anyone?

How useful! After walking my bike up the hill, I could come down really, really fast.
But really, how many of us can push a 60 tooth gear?
I think you'd just be compensating for a lack of private part mass.

TA of France used to make a 72-tooth chainring.

Kicking your ass all the way! Although, I think he has changed his tag line since.

As the OP wrote, it's useful for small wheels. On a 20" drive wheel, a 60/11 is only 107 gear inches, lower than what's on most road bikes these days. I have a 58T on my bike, with a 26" drive wheel, and consider it just about right.

High gear is 62-11 on my 'bent. You need a big ratio to spin those little 20" wheels!

I've got a 60 tooth ring for a 650c rear wheel 60/11 on a lowracer isn't too uncommon.

Resurrecting an old thread...

From Sheldons site: "If you have 406 mm (20") wheels, you would need to install a 69 tooth chainring to be equivalent to a 52 tooth with common 622mm wheels."

FWIW, if you want to make your own chainrings, there's a template available on iHPVA's site that involves only using a drill press.

Here: https://www.ihpva.org/Builders/Sprocket/

Sizes up to (heavens-to-Murgatroid) 92-teeth from those templates.

My RANS vivo has a 61 tooth front, beat you by one. It's a 20-inch recumbent.

I only wish I had a 60T.

My challenge is finding large steel rings (56T would be nice) to fit a 110-BCD triple or finding a 130/74BCD triple crankset that doesn't use splined bottom-bracket spindles. (no luck yet...used market perhaps?)

Why steel rings? Al is superior in every way for large rings.
You can get custom rings made in the UK in any size/BCD from highpath engineering.

Hmmm... wait... how about 60-9 all the way! (shimanos 9 tooth rear!)