I just purchased a new Grand Designs Reflection 295RL and it came with West Lake Super ST225/75R15LRE which has a speed rating of "L" (75mph) Just as a video about someone changing to Goodyear Endura...
No where near enough load capacity with those tires and that size fifth wheel..do yourself a favor and dump the tires now and install sme Sailun S637 G rated 14 ply tires
Your pocket book will love you down the road because those E rated tires won’t handle the load.
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