Could Shimano come out with a 14-speed cassette before 2019?

[Jeff Barber]

Back in 1999, Shimano was granted a US patent for “Multiple Sprocket Assembly for Bicycle,” and in the patent summary they wrote,

The present invention is directed to a bicycle drive mechanism which includes a large number of freewheel sprockets, for example, ten or more and preferably fourteen freewheel sprockets.

Emphasis added. Even the sketches in the patent document show a cassette with 14 sprockets. The largest sprockets seem to float over the spokes, giving the back of the cassette a reverse conical shape seemingly to account for the need for additional clearance. The patent conceives of a special chain to make this possible as well, so it’s not exactly a simple solution.

The patent is set to expire in September of 2019, so could Shimano be working on a drivetrain that jumps 2 gears past SRAM Eagle? Or have they already given up on trying to make this system work?

[mtnryder ✓ supporter]

I’m happy with the gear spacing on my bike at 10-50 with the SRAM Eagle so I can’t actually see how having two more sprockets inside those parameters would be of any help to me. Maybe a 52 tooth in a few years to keep me off one of those electric mopeds everybody keeps talking about.

[Alvin Mullen]

I run a 1×9 11-40, I can see going to 1×11 someday, but I don’t think 14 would be of any use to me. Maybe for someone who races and is always looking for that perfect gear for each situation.

[Dr Sweets]

@Alvin Mullen: “I run a 1×9 11-40…”

Is that a 9-speed cassette with a 40t cog hack? Are you using a 9-speed derailleur/shifter? I have several old left 9-speed drivetrains that I could do this with.

[craZivn]

I’m gonna hold off purchasing until Sram replies with a 30-speed, 7×100 cassette in 2023.

[triton189]

You know what they should do?  Put a 10 speed cassette on the back and 2 or 3 chain rings of various sizes on the crank and then have a “front derailleur” type thingy to move the chain from one ring to the other.  This would give you a huge range of gears…..right?

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