Page 81 - Trimax_mag166_UK

MATERIAL OF SIMON BILLEAU

Sram has taken the lead by
creating a full 1X groupset.
It is a risky move as some
cyclists and triathletes
aren’t keen on changing
their habits.

But the idea of having only
a single chainring isn’t new.
Some guys already did
use a single chainring like
David Millar on the 2003
Tour de France on the first
TT stage. His chain fell off
as he didn’t have a front

deraillor. His chainring was a standard chainring who won the WTS serie in 2015 with a Sram Force
for a double chainring use. 1X, or Jordan Rapp, Luke Mc Kenzie, or more
recently Tony Martin using a 58T prototype 1X on
Nowadays, lot of triathletes and specially talented an Sram Etap groupset and a 11/32 cassette on the
ones are using the Sram 1X like Alistair Brownlee last Tour de France.

During the long production
process of the 1X, the ingeniors
of Sram had in mind to offer a
full groupset which would be
simple, silent and reliable.

After few months of testing,
I can certify that this group
gives full satisfaction and
there is no limitation when the
1X chainring is used with the
1X groupset (either Force 1X ,
Rival 1X or Apex 1X).

The first advantage of the 1X groupset and so its 39 and 11-28. At a 6,60m gear-centimeters table the
1X chainring is that it simplifies highly every single best gear ratio is 53-17 and not 39-13 for exemple.
session of training or races. There isn’t anymore the The second gear ratio (39-13) costs roughly 2 more
question of guessing what is the most efficient gear watts in term of friction to the cyclist.
ration in term of friction.
The main idea is this study is that big chainring is
Everybody knows a chain works better when it mostly all the time more efficent than the small
is straight. But not everybody knows the best chainring for a given speed, except for very steep
performance output for a double chainring of 53- sections...

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