Please
note that ICE bikes are only available from the ICE factory with
the gears listed in these specifications
which we believe to be a great range. You may wish to speak to your dealer if you have other special requirements.
The
gearing is an important part of
making sure your machine can be comfortably
ridden over the terrain where you want to
ride it. A wide gear range
is the key to being able to tackle any situation.
Going
up hill Our bikes are fitted with a very useful low gear for comfortably climbing steep hills.
Going
down hill The top gear speed will
depend on your preferred pedaling style -
if you spin the pedals round, you will be
able to keep pedaling at a higher speed. If
you like to pedal slower then you will still be able to ride at a good speed due to the ICE custom 9 - 32T 9 speed cassette fitted to the B1. The special small 9T sprocket gives a big top gear of 107.7" (8.603m), remarkable for a smaller wheeled bike..
The B2 uses a 52T outer chain ring and 11T rear cassette sprocket with the 26" rear wheel giving a top gear of 116"
Like many cyclists we
use "gear inches" to give an idea
of how the gears compare in their
overall range.
The gear inches number is a simple calculation
-
Number of teeth on the
chain ring divided by the number of teeth
on the rear sprocket multiplied by the tyre
diameter in inches.
So for a 50t chain ring
and a 9t sprocket on a 20" wheel
with a Marathon Racer tyre, the gear inch will
be - 50/9
x 19.4" = 107.7" (8.603m)
The wheel size we use
is generally known as 20". In practice the actual outside
diameter depends on the type
of tyre fitted. So be warned, a 20"
wheel can actually be 18.5" diameter
if a Stelvio tyre is fitted for example!
Gear range is also often expressed in Meters development which are the figures shown above in brackets.
When buying tyres for
any bike or trike it can help to know what
the ETRTO number is for your wheel size.
Our 20"
wheels are ETRTO 406 (this is the same 20"
as many BMX wheels). Another less common
20" tyre size exists and is known as
ETRTO 451 - These DO NOT fit our 20"
rims!
The actual diameter is
not particularly important unless buying
replacements except that it does effect
the gear inch calculation.
Actual
Tyre diameter used by ICE for gear
inch calc's
Wheel
size
ETRTO
Actual
Approx. Rear Tyre diameter
20"
406
Schwalbe Marathon Racer = 19.4" diameter
26"
559
Schwalbe Marathon Racer = 24.5 " diameter
20"
Rear Wheeled ICE B1
20"
Chain set
Truvative Elita 170mm
34/50 Alloy rings
Bottom
Bracket
Truvative GXP external BB bearings
Front
Changer
SRAM Rival
Rear
Changer
SRAM X9
Gear
Shifters
SRAM X9
Rear
Hub
ICE Custom 4 cartridge bearings, IS disc brake compatible, Shimano Capreo compatible, Alloy QR
