The hidden bolt allows for 2cm more of seat post extention, increasing compliance, but the post slipped during our test. 2017 Cannondale SuperX Cyclocross bike. © Cyclocross Magazine

The hidden bolt allows for 2cm more of seat post extention, increasing compliance, but the post slipped during our test. 2017 Cannondale SuperX Cyclocross bike. © Cyclocross Magazineundefined