And here‘s my Tantan GR201.

Peak Torque G21 Altera tire clearance. Looks like a 2.1 is the limit in the rear, which is honestly a bit surprising to me. Those things measure more or less true to the official 53mm clearance, it should be possible to squeeze in a bit more. And he put way bigger tires on the old version.

I've definitely seen a G21 with Race Kings at a race, but I think that was also the old version.

I made a second iteration. This one actually had some planning behind it so it turned out much better than last time when I was making it up as I went. There are still some errors (I wish I remembered what I was doing when I sketched out the fork crown 2 mm further forward than the head tube) and some things I didn't have the foresight to plan around, but for the most part it's alright enough that I can put it through some cfd. The fork even turns a full 360° without contacting the frame. Should still clear 40mm tyres and geometry is a touch more aggressive

When I posted the first design, a user messaged me that they saw some prototypes from XMCS, so they are probably far along enough in production that if there are any similarities, they probably arrived there separately.

I won't clog this thread further so it'll probably just be a private passion project from now on.

The original is Dura-ace and ultegra to. There is a seperate one for 105. I would not try it