Turboman said:

The later ones are less harsh, they are known as soft lockers, and have some steel bushes inside replaced with polyurethane.



I have never been to BC, but I have been to Eastern Canada, and it is a bit different to the UK. Over here, dirt roads, ice, and rocks are not that common. What is common is clay soils, and lots and lots of rain, which results is surfaces that are extremely greasy. So often you may not make progress even over a moderately sloping field, let alone Mount Everest.

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