From what I've seen on this forum its members aren't shy of spending a bob or two on the latest biking kit/bling/fad. 1x10, 2x10, wider bars, shorter stems, tubeless wheels and plusher gold coloured forks that cost the best part of a grand are always getting debated on here
But what pieces of kit have you bought that have genuinely made you a faster rider?
For me its SPDs and a dropper post, both have transformed my riding, far more than anything else I've ever bought
ps,,,you aren't allowed to say 'a session with Jedi'