ti-s1 is a singlespeed frame for x-country riding.
What did Sheldon Brown say on singlespeeds:
"
Modern 24-27 speed bikes are marvels of technology, and
allow a cyclist to select the gear ratio that will make the most
efficient use of his/her energy. If what you're after is getting the
maximum possible speed/distance for the minimum effort (and there's
nothing wrong with that!) a multi-speed bike is what you need...but,
efficiency isn't everything!
If you're riding for sheer pleasure, or for exercise, you don't
necessarily place that high a premium on output results, as measured in
speed, distance or vertical climb. Instead, you may care more about the
actual experience of riding your bike. In this case, you may be a
candidate for a singlespeed bike.
Riding a singlespeed can help bring back the unfettered joy you
experienced riding your bike as a child. You don't realize how much
mental energy you devote to shifting until you relinquish your
derailers, and discover that a whole corner of your brain that was
formerly wondering when to shift is now free to enjoy your surroundings
and sensations.
Paradoxically, a singlespeed is, in another sense more
efficient than a multispeed bike! While the single gear ratio will not
be the "perfect" gear ratio for all conditions, in the conditions which
fit the single gear, it is considerably more efficient mechanically
than the drive train of a derailer bike.
A singlespeed bike
dispenses with the weight of the derailers, shifters, cables, extra
sprockets and longer chain. In addition, a singlespeed gear train runs
the chain in a perfectly straight line from sprocket to chainwheel, and
avoids the serpentine wind through the pullies of a derailer. You can
really feel the difference! A singlespeed is noticeably quicker and
easier to pedal than a multispeed bike in the same gain ratio.
Singlespeed bikes are also considerably more sturdy and reliable than
multispeed bikes. There's no derailer to catch on the underbrush or to
get overshifted into the spokes. The rear wheel itself is a lot
stronger than one made with off-center (dished) spoking to make room
for a whole bunch of sprockets on one side.
"
(so titerra team applied all the experience and build a signlespeed frame for enhanced x-country riding.