Sorry for the slow reply. I was away for the Easter weekend, on the Kettwiesel. My 2008 AL model has a clamp for the mech. The older steel ones either had a post or didn't. The AL models can have the clamp on post added at a later date. Be aware you'll need to fit the Quick Adjust kit too in order to get the chain capacity to handle the triple and rear cassette. The QA set gives a floating, and sprung, additional take up of slack chain. So I'm running 26-40-53 to 11-34 with a medium reach rear mech'. Longer mechs get too close to the ground for safety. Hope this helps.