Spoke length allowance I used an online spoke calculator for, uh, calculating the spoke lengths that I need. The results of the calculator are as follows:

Front

Left - 276.5mm
Right - 277.8mm


Rear

Left - 275mm
Right - 273.4mm



The rims are WTB KOM Tough i35 27.5&quot; with an ERD of 568mm. The hubs are Shimano XT M8110-B.
Thing is, LBSs here only have limited lengths for different tire sizes. For 27.5&quot;, they only have 270mm and 275mm. Will the 275mm work for my wheels or should I just go look for the correct lengths online?
The length is what matters, so if they claim to have the right length for a different wheel you could use those - but it would be a sign of a clueless shop.
Otherwise better to order the correct length.  275mm for that front right is too short, nearly 3mm under, while for the rear right you're either under or over. Many places stock 2mm increments; my local supplier does 1mm