wrote:
A couple of months ago I was struck by a car that decided four way stop
intersections were not what they meant. I had come to a complete stop and
allowed ALL of the traffic to pass and started across. I got 2/3eds of
the way across and the woman who had been behind a pickup I let pass
rolled the stop sign and accelerated directly into me. She was obviously
distracted but the old bat might have been having her first clear shot at
a bike for all I know.

In any case perhaps I should start from the beginning - back around 2008
I bought a new Time VX Elite carbon fiber bike. With the normal 120 psi
23 mm tires it was completely un-ridable. It was so stiff it would hammer
your balls through your skull on the first bump. So it went up on the
shelf. I removed the components and used them elsewhere and that frame
just sat there. Anyway I decided to put it back together and since the
latest fad is fat tires I put 28 mm Michelin Krylon Endurance on them.
What an F-ING difference! With the fat tires it is one of the best rides I've ever had.

My Pinarello Stelvio was the one I was riding when I was hit and while
the frame and fork came though OK every component on the bike was broken.

I had Campy Scirroco CX wheels on it and I discovered that I HATE aero
wheels with a passion. Since her insurance company was paying for it I
bought a set of Fulcrum Racing 3 wheels that were last year's and on
clearance. When they arrived they were already set up for Tubeless. Well,
I had been wanting to try that as well.


The older steel bikes won't fit fat tires so the largest that would fit
are 25's. I installed the tires on the wheels. I had bought 4 ounce
bottle of Orange sealant which was the best in the tests I read.


Now the tires will not go onto the rims because they are a bit tight. So
first I put the filler at the bottom and using a Park Valve Tool I
removed the valve head. Pumped in 2 ounces of Orange then turned the
wheel perhaps 1/8th of a turn so that when you release the squeeze bottle
it doesn't suck the sealant back in. Then I hit it with a CO2 cartridge.
POP!!! it was on and I rotated the wheel while laying it on one side and
then the other since initial leaks are from the tire and rim not being a perfect fit.


Every morning I had to pump the tires up until I finally took it for a
ride and that fit the tires well onto the rim and the bumps packed sealant into any voids.


Now the tires with tubes would normally run around 110 lbs and be not
very easy riding. But now I ride between 60 and 80 psi (letting the
pressure go down over a week before refilling).

The ride is exceptional. With the higher pressure they are sort of bouncy
so fast downhills can be scary. With the lower pressure the rolling
resistance doesn't seem to increase detectably. Riding with guys with the
high pressure tube tires I find myself coasting while they are pedaling.

Not to mention they cannot get a pinch flat and with the sealant they
cannot get flats. So I can leave that damn 2 lb flat kit at home and just
take a multitool and a CO2 cartridge and filler just in case I get a
large enough hole that the tire gets too soft before sealing. And I doubt
I'll ever need that.

So if you've had any questions about how tubeless works I am quite
satisfied with it after a couple of months.

Now I ride sport bikes and I don't know that this would be a good idea
for 32 mm commuter tires. Though probably, because they talk about using
them for CX tires which have a lot of pinch flat problems. But these
normally run higher pressures than you would with a tube in it. There's
always the possibility of it blowing the tire off of the rim unless
you're using Mavic tires and rims specifically designed to work together
tubeless. As far as I know Mavic are the only people to have "systems" designed.

I’d agree with other comment that potentially you where running too high
pressures with tubes, my only road bike now is a gravel bike with 32mm
tyres which sweet spot with tubes is 60psi ie soft enough to conform to the
road, with out squirming or dinging the rim, tubeless and on road the risk
of pinch punctures etc is much lower than gravel/bridleway hacking so you
could drop a fair bit lower.

Though lot is personal feel I hate the squirm of low pressure tyres, on the
MTB I don’t drop below 30psi.

For commuting tyres, which tend to be stiff, hard wearing, puncture proof
things. Tubeless doesn’t really offer much.

I did toy with the idea of Tubeless for my new job location as though it’s
parks and segregated bike lanes, it’s also littered with large amounts of
broken glass/bottles etc. Even the Marathon Plus Touring though not
punctured have picked up some impressive war wounds.

Roger Merriman