Deda beefed up the diameter to beef up the stiffness, and according to their numbers the bars are indeed stiffer, 51.5% stiffer to be exact. That extra width comes at the Trentacinque stem and the tops of the matching M35 bars, with the drops a more traditional width to accept brake levers.

While the fact that the bars are indeed stiffer is easy to believe, what may be more debatable is whether or not that stiffness is of any use to the cyclist. If the current 31.8 diameter offers enough stiffness to be stable and inflexible any more stiffness is unnecessary. With incredibly powerful riders like Tom Boonen and Mark Cavendish able to find 31.8 bar and stem combos that provide enough stiffness for their power numbers the group of riders that may need Trentacinque must be small indeed.

Deda also claims the wider tops provide an easier grip which reduces hand fatigue and could potentially reduce numbness in the palms and fingers some riders experience with long hours. This is a benefit that could be of real use to riders.

What is truly impressive is the weights Deda has achieved, 136 grams for a 110mm stem and 210 grams for a 42cm monocoque carbon bar. These are weights competitive with standard 31.8mm cockpits.