What is the largest chainring size available?

Question

With the help of some friends during an extreme biking competition, I became interested in extreme modifications of bicycles. Now I have a question, what’s the biggest chainring anybody has been able to use and has anyone actually done so?

Answer 1

The biggest chainring size that an individual managed to find and that was also mentioned in the video is a 75 tooth chainring. This chainring was sourced from an online store and tried on a bike to test its suitability on level ground as well as during climbs and the highest speeds that can be achieved with such a big chainring.

Comments

As a velomobilist I can truly confirm, that there are way bigger chainrings than 75 teeth, Man are you joking? 75? I could walk instead.

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This is great, just a lads day fluffing in the shed (although a fancy one) and trying silly things

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I was at a ski resort yesterday with a lot of MTB off-road downhillers around. The bikes, however, all seem to be geared for extreme climbing. One of those rear cassetes with the huge low gear cog would be interesting with this chainring. You’d need the second chain for sure though.

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I think 54 tooth chainring its like the optimal for a road bike, more than that, it starts to turn into track bike, but you dont have climbs, traffic, and so

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I have a folding bike with a 65 tooth chainring. It's really fun as long as I don't have to go uphill too long.