No offense, but I strongly disagree with your opinion about big tires
getting you more load capacity. I say this from my personal experience in
primarily riding with 1.5 tires. I have carried SO much stuff. Many
people on this list have already seen some of the photos of my loads, so
I will not bother posting links to them this time around. In the past I
always bought 26 x 1.5 Avocet Kevlar lined tires with the inverted
zig-zag tread, and I would go months with out a flat. As an extra
precaution, I would also squirt in Slime just in case. That was back when
I was working as a bike messenger in NYC. The rubber was a stiffer/harder
type in those avocet tires, so they lasted much longer. Of course, I
mainly only ride on pavement with occasional packed dirt trails.
Unfortunately for me in the last several years Avocet stopped making
these tires from what I understand. If I had to guess, the tires lasted
so long they did not make enough money off them. I was really bummed when
I stopped being able to get those tires.
I do not know if this helps put my own opinion into perspective, but I
would pump my tires anywhere between 80-110 PSI. At that pressure my
tires were solid and very responsive. I still felt my ride was
better/softer than riding on any road bike. For those especially heavy
loads, I actually much rather preferred a higher inflated tire. I
disliked feeling the bounce in lower pressure tire when hauling a big
I will not at all argue your point about better protection from potholes
when riding on bigger less-inflated tires. I just avoided pot holes,
which is sometimes difficult in NYC, but I never had a problem. I did
frequently fly off sidewalk curbs though, which I would consider harsher
on a cargo bike than a mild pot hole. I would not bunny hop off sidewalks
or anything, and I would usually only fly off them when unloaded.
Unloaded for me though is still riding with about thirty pounds on top of
the bike itself.
I am not sure what you mean by longer intervals between tire inflation.
Maybe I never had a larger tire on my bike long enough to notice a
difference in re-inflation periods. I think I tended to
inflate/re-inlfate my tires mainly when I had flats. Truthfully, many
times when I finally got around to patching or replacing my inner tubes,
sometimes I would find two or three puncture points. I am almost positive
I must have been getting flats over stretches of time, but the Slime I
put in clogged them up enough so I would only have to inflate my tires up
once every week or every other week. When I did not get flats I would
never have to re-inflate my tires to pump them up to a higher desired PSI
unless for some disturbing reason my bike was not ridden for a long
stretch of time. Of course back then that would have been NEVER as my
bike was my primary mode of transportation as well as my profession.