They can be hard to break loose , WD40 is not a penetrant oil , try Aero Kroil , 3M 5 in One , Acetone and ATF 50/50 or even PBBlaster would be a better choice than WD40 ------ a 4 or 5 ft cheater pipe might help ------- what I use is a 1 5/8"/41MM 3/4 drive socket that was cut in half and a piece of pipe welded in the middle so it is a very deep dish socket , then use a 3/4 drive air impact or 3/4 drive ratchet and cheater pipe ---there are other ways to go about itHi - It’s a TRX 420 - just can’t shift these nuts with the 41mm spanner. Any thoughts??, tried heat WD40 oil etc.
--- wheel nutsHi: If they been torque at the right torque of 47 Foot pounds -- they would break free with little force.