SRAM Specialized SL4s
SRAM’s AeroLink brake is an aerodynamic single pivot unit.
The AeroLink (or multi-link) arm helps provide more braking power than usually associated with a single pivot design.
Another feature of pro bikes is the number holder, this twisted aluminium one bolted on with the rear brake.
If that’s whetted your appetite you can watch these videos to get all of the extra information that SRAM’s Jason Phillips can provide on these bikes: