[NMCycling] Coal rolling in SF

[Brock tice via Bike-racers]

On 06/21/2017 12:17 PM, Craig M. Doolittle via Bike-racers wrote:
> So, the truck has been purposefully modified, but the owner doesn’t know
> about it?

With his comment about the incline and weight of the truck perhaps he's
pointing out that it's typical when accelerating up such a grade for the
truck to produce a lot of soot. It may not actually be modified.