10 speed Shimano crank/rings on 11 speed group Shimano

[bikerjulio]

I have actually done it both ways. I have a 10-speed crank running an otherwise 11-speed drivetrain, and I have used an 11-speed crank on a 10-spd drivetrain. Both work just fine.

[Tinea Pedis]

I ran my 7900 SRM on 9000 for all of last season. 11sp chain.

Not an issue.

[chris8382]

I have actually done it both ways. I have a 10-speed crank running an otherwise 11-speed drivetrain, and I have used an 11-speed crank on a 10-spd drivetrain. Both work just fine.

Completely agree. Never had problems running either 10sp or 11sp rings on either drive train. I am always sure to match the chain (10sp or 11sp) to the rear cog spacing (10sp or 11sp), but otherwise everything else works fine between groups.

[firstbuell]

based on my intended hardware changes, this thread has been a gem to encounter

my 2014 Giant sports a complete 6800 Ultegra 11x2 drivetrain, which I'd like to modify with a 6703 Ultegra 10-speed triple crankset [+ triple F derailler & 6703 F shifter]

if so modified, will it still shift well, and otherwise not be an expensive mistake?

thanks in advance