Hi everyone, today I started assembling my build, but I’m having an issue with the bottom bracket. As shown in the photos, with a SRAM Red 22 crankset (53/39 chainrings) and a BB68/73 bottom bracket, when used without spacers, the crankset sits about 1 mm away from the chainstay. When I use a 2.5 mm spacer, the distance to the chainstay increases to 3.5 mm.
However, in this case, when I torque the crankset to 30 Nm, it gets so tight that it almost doesn’t rotate at all. On the other hand, without the spacer, even at 35 Nm, there is no binding and it spins smoothly.
Has anyone else experienced this issue?
By the way, I measured the SRAM Red 22 crank spindle length as 107 mm.