Suppose mudguards, but thats because it is where I live
the French Berthoud company has some in Carbon fiber so as to keep both wheelspray and weight down..

and I dont care for round grips, any more, after trying Ergon grips, and their comfortable palm support..

this one includes a carbon fiber Bar End http://www.ergon-bike.com/us/en/product/gs2-carbon

GS1 is w/o bar end

& flatlands the 36t chainring seems un needed , you could put a 46 on there,
and the shift between the 2, 50-46 would be a snap.

Paris Roubaix is not a hilly race, they use a 46-53..