Hi,
the trace capacitance depends on the layout by means of trace width and distance to ground plane as well as the chosen layer (Stripline, Microstrip, Embeded Stripline,...). Basically you can estimate this capacitance by considering the trace and the ground plane (underneath) as a parallel plate capacitor. A good tool to determine those kind of capacitances is
Saturn PCB Toolkit, it is for free. So your goal is to charge and discharge those capacitances fast enough by choosing appropriate pull-up resistors. See this datasheet
P82B715, which addresses the calculation of the pull-up resistors. By assuming a trace capacitance of about 0.5 pF/cm your total trace capacitance would in the range of 25 pF. A typical MCU GPIO pin contributs in an additional capacitance of about 4 pF.
If it comes to noise supression a differntial I²C implementation might be of interest. A possible IC would be the
PCA9615.
In my personal point of view the the repeaters are not necessary. Even the pull-up resistors values are already in the range as determined for the mentioned assumptions above. Also the enable pins of the repeaters are not used, which might be of interest if some one has to use the same I²C address multiple times
BTW, what I'm missing are the pull-up resistors on the left side of your repeaters.