https://www.titleist.co.uk/teamtitleist/team-titleist/f/golf-clubs/47989/t400 While looking at the T400 on the website, I notice that shaft selection is limited to... Regular flex in the steel shaft, and L, A, R flex in Graphite. I&#39;ll assume that a stiff shaft is available in steel at no upcharge? en-USTelligent Community 10https://www.titleist.co.uk/teamtitleist/thread/270651?ContentTypeID=1Tue, 16 Jun 2020 15:46:37 GMT9ab519fc-5311-4952-85cd-0a0ceffb73fb:40eaecca-42c2-421b-b288-48bbeb6b73c4Don OWhile any shaft in the iron matrix can be used, the base shafts are in line with the intended audience, as Dave M has posted. But I did see one U-Tube by a high speed swinger that gushed over the 250 yards he was getting with the 6 iron. This was not a Titleist promotion.<div style="clear:both;"></div>https://www.titleist.co.uk/teamtitleist/thread/270593?ContentTypeID=1Mon, 15 Jun 2020 21:46:12 GMT9ab519fc-5311-4952-85cd-0a0ceffb73fb:58ea83c0-6443-4587-93a5-219c4557b916Dave MThe T400 is designed to pair well with the TS1 driver, slower swing speeds, ultralightweight shafts, higher flight, more distance etc. I am sure you could get them in a stiff flex, but it changes the true design of the club. I have fit guys in the TS1 in stiff shafts and swap the air speeder for a kurakage or tensei av.<div style="clear:both;"></div>https://www.titleist.co.uk/teamtitleist/thread/270582?ContentTypeID=1Mon, 15 Jun 2020 21:04:25 GMT9ab519fc-5311-4952-85cd-0a0ceffb73fb:3425f1bf-7569-45d3-a50d-b095020dbe5dFrank PCould be, but I don&#39;t think that the T-400&#39;s are geared for those who play stiff shafts.<div style="clear:both;"></div>