let me first say that I don't have a lot of experience on this topic so my questions will basically be two-fold: First ask if my observations and assumptions about the gear I have is correct and then what I need to do with this information.
I do have two wheels that I want to use with a frame. The wheels are as far as I can tell WTB Serra i23 TSC 2.0 wheels. I haven't found anything written on the hub so I guess these are WTB Serra hubs. I measured the front wheel hub to have an inner diameter of 12mm and and length of 100mm. The rear wheel I measured to be roughly 12x142. However, the frame is, I think, designed for quick release wheels and not thru axles and I measured on the fork an diameter of the dropout (is that the right term?) of 10mm and the inner distance of the dropouts to be 101mm. So I guess, this is a 9x100 QR fork? In particular, I was confused that I measured 10mm instead of the apparently common 9mm but I guess that happens? For the rear I measured again a diameter of 10mm for the dropouts and roughly an inner distance of 138mm between the dropouts. So this should be 10x135 QR, right? Also I have added some pictures that show the end cap of the rear wheel and a picture of my frame to confirm what I said is true.
Now, if all of the above are true, I cannot fit the wheels into the frame and need to make some adjustments. For the front wheel I have seen some adapters (e.g. an 12x100 to 9x100 QR adapter made by SON) and then using a QR skewer for 9x100 this should work? For the rear wheel I need to decrease the width of the hub. I read that this is usually only possible if the manufacturer makes end caps that can be changed. I saw on the WTB web page these drawings (WTB Serra hubs) and this replacement parts page (WTB replacement parts) that can be ordered so I am optimistic that this should be possible in theory. Now, my main question is what I will need to order and install. First, I thought that I would only need to replace the end caps so that I can just order the desired 10x135 QR Serra end caps that are mentioned on the replacement parts page. But when looking at the drawings (where a lot is displayed that I don't understand), it looks like e.g. the 10x135 QR Serra hub uses differently sized bearings compared to the 12x142 hun meaning that this (and maybe more) needs to be changed as well. What do you think?
Finally, I do have another logistical problem that I am not sure if you can help me but I do live in Europe so I cannot just order from the WTB page. There are some European distributors listed but when I click on the one for my country, this distributor seems to be only for B2B customers. Do you have any ideas how I could get the needed parts? Should I just go to a local bike shop and ask whether they can order parts from WTB?
Thanks a lot!
Edit: Now, I have also noticed that in the drawings of the hubs it is stated that the Serra QR x 135 hub is using 32 spokes whereas the 12x142 is using 28 spokes. And indeed I have counted the spokes and there 28 on my rear wheel. Is this the final blow to my plans? What should I do?