I'm fixing up my box trailer (a Lynton Loadtrekker), which is now 9 years old.
I want to replace the rusted wheels and aging tyres, as I was advised in this answer.
Now I'm trying to work out what replacement part to order. I don't have a manual for the trailer. I've been working out the details by looking at the original wheels and tyres. A local supplier has pointed me at two apparently suitable replacements, but they aren't quite the same as the originals.
5.00-10 4 stud holes with 4" PCD Zero offset 8 ply rating Tyres marked: Max load 500 kg at 71 PSI Trailer plate marked: Gross laden weight 750 kg, Tyre pressure 60 PSI
Replacement candidate 1 TWT 1011:
6 ply Max load per tyre 437 kg Max pressure 45 PSI
Replacement candidate 2 TWT 1012:
8 ply Max load per tyre 475 kg Max pressure 65 PSI £13 more expensive than candidate 1 per tyre
If I understand this correctly, both candidates are OK with respect to max load: I need at least 375 kg per tyre (trailer gross laden weight 750 kg / 2).
Also, because candidate 2 has a higher ply rating, I expect it might last a bit longer.
But I'm confused about the tyre pressure.
The supplier says with candidate 1, I'd need to inflate the tyres to their max pressure of 45 PSI.
They haven't given me a clear answer about candidate 2. I assume I shouldn't inflate them to max, similar to the originals, where max marked on the tyre is 71 PSI, but the trailer plate says to use 60 PSI.
So the simpler (and cheaper!) choice seems to be candidate 1. But is this safe, given the replacements use a lower ply rating than the original?
The original tyre:
5.00-10 84N 8 P.R. LOAD RANGE D MAX LOAD 500 KGS 1105 LBS AT 5.0 BAR 71 P.S.I. PRESS TUBELESS E4 0013825 4907 RIM:3 KINGS TYRE MOULD FROM U.S.A DOT 1NB1
Here's the trailer, to give an idea: