Crankset 6600 sl to 7900?

[bikenut]

Friend has a 7900 crank he will sell me cheap. Is it a worthy upgrade it to go from Ultegra SL to 7900 cranks? The cost of replacement rings is somewhat of a deterent.

[spartanKid]

You can put non-6700/7900 rings on 6700/7900 cranks, it just looks really weird.

[Cicli]

I dont know if its really an upgrade but its an easy swap.

And, when was the last time you wore out a set of chainrings?
Those rings do shift really well too.

[bikenut]

I dont know if its really an upgrade but its an easy swap.

And, when was the last time you wore out a set of chainrings?
Those rings do shift really well too.

Will I notice a difference in shifting?

[joosttx]

Will I notice a difference in shifting?

Not really between brands but adding new ring could improve shifting depending how worn your other rings are

[dave thompson]

Will I notice a difference in shifting?

The reputation for excellent shifting of the 7900 comes from the crankset and front derailleur and front shifter. IMO just installing a set of the cranks will gain very little.