12-23 cluster for training?

[wisecrack]

I am currently using a 12-25 10spd Dura Ace cluster on my race wheels and am considering getting a 12-23 Ultegra cluster to put on my training wheels.

 

Would the 12-23 be good to use for training?

My route of between 40 and 50km has some small hills but nothing life threatening. Should I rather stick to 12-25 or even 11-23? 

[Racer X]

I'd stick to a 25, when you race, it'll be the same.

[Speed Devil]

I'd stick to a 25' date=' when you race, it'll be the same.[/quote']

 

I train and race with different wheels and use the same ratio on both wheels. That way I don't get any nasty surprises when I have to suddenly gear up or down and my "favourite" gear isn't there.

[Racer X]

my point exactly