Pioneer DDJ-RB Short Tempo Adjust

A few points here:

1) If you mix stuff you can set the pitch range in your software to the lowest number (often 6 or even 4%), this will give you the highest “resolution”.
2) In the days of vinyl there were no BPM indicators on turntables, yet beat-matching manually was done quite succesfully.
3) In the early days of CDJ-like players BPM read-outs would be limited to no or 1 digit. Your example would show as 137 or 137,0.
4) It is highly unlikely you can get two tracks pitched perfectly using pitch faders. You CAN however get them close enough for a simple 16-beat transition to runs smoothly.
5) A big part of learning to manually beat match (applauding you for taking the time to teach yourself this btw) is learning how to nudge.

My challenge to you in your learning process would be to also cover up the BPM counters and try to go fully manual or “blind”. Trust your ears, practice and you will soon find out that a small nudge here and there will keep you out of trouble with prolonged transitions. There are plenty of courses that cover manual beat-matching (including DDJT courses of course) as well as loads of Youtube vids. There are a few major ways of doing it, but you will have to figure out which one you like best.

Depending on your view, in the deck windows, next to where the track name, artist, played/remaining time and such show up, on the right hand side you will find three buttons:

SYNC
WIDE MASTER

If you click on WIDE once, it will change into +/-6%, next click 10%, then 16% and finally wide again.
Try setting it to 6% and see if that helps. Wide (default setting it seems) gives a 100% up and down margin. WAY too much for any fader, let alone the short ones on the RB. With the setting at 6 you should be able to get very close to the desired result I would think.

Let us know if that helps.