Thanks again for all the replies, only doubt now is the 1x vs 2x choice.. mmmh.. I find better deals on SuperX Force 1 than Ultegra 2x, maybe swapping chainring at the front 40t -> 44t will solve the problem. With 1x jumps are big - I'm a bit scared it's going to be not ideal uphill on paved road - with long and costant ascents.. 36 to 46 jumps are quite big..