Whether daily commuting to the office, weekend tours or transalp by mountain bike: with 600% overall ratio, the C1.12 gearbox beats modern derailleurs by far. 12 gears are 17.7% even and finely graded, thus offering the right gear for every situation and, thanks to the low centre of gravity, the typical Pinion riding dynamics.
THE C1.12-GEARBOX IN COMPARISON
"THE GEARBOX DELIVERS RIDING PLEASURE FROM THE FIRST SECOND ON AND ALWAYS OFFERS THE PERFECT GEAR RATIO. I AM TOTALLY CONVINCED!"
TOM BIERL, CHIEF EDITOR TREKKINGBIKE (05/2013)
C1.12 Ratio Calculator
The Pinion gearbox calculator helps you to choose the ideal gearbox tuning. The internal gear ratio for each gear of all types of gearboxes is already defined in our calculator. The entire spectrum of a Pinion transmission can be shifted to fast or slow with the secondary ratio to the rear wheel. A 1:1 tuning is also possible by using sprockets of the same size or toothed belt pulleys.
The size ratio, or the ratio of the number of teeth between chainring and rear sprocket is called ratio. Together with the circumference of the wheel the unfolding can be calculated. The unfolding is the distance in meters or centimeters travelled by a bicycle with one crank rotation.
C1.12 TECHNICAL DATA
|transmission type||Spur gearing|
|Number of gears||12|
|Overall ratio||600 %|
|Gear steps||17,7% constant|
|Recommended ratio of
Rear Sprockets (21t/24t for example) to front
|Gain ratio in 1st gear (21t/24t)/td>||1,82|
|Gain ratio in 12th gear (21t/24t)||0,3|
Real gears refer to the gear steps of a bicycle transmission that can be optimally used. In derailleur gears, the skewed running of the chain leads to significant losses of efficiency. In addition, when there are two or three front sprockets there will be redundant, i.e. equivalent, gears. A 3×10 derailleur transmission, for example, actually only offers 14 or 15 real gears from this perspective.
|Chain line with Pinion chain ring||54 mm|
|Maximum input torque||250 Nm|
|Axle standard||Pinion splined shaft|
|Q-faktor 1||166 mm|
|Oil type||Pinion gearbox oil 2|
|Oil capacity||60 ml (2.0 oz)|
|Temperature range||5 °F to 104 °F|
- Distance between the outer faces of the crank arms at the level of the pedal attachment points
- synthetic, viscosity 68
- including lock ring, crank central screws and shift cover with fastening screws
- including crank clamp screws
- including fastening screws
|Oil change interval||every 6.200 miles /
Once a year
|Gearbox 3||2100,0 g|
|Rotary shifter Ds2||95,0 g|
|Crank arms „CNC“ 175 mm 4||434,5 g|
|Crank arms „Forged“ 175 mm 4||481,5 g|
|Chain tensioner (Federstärke: 2,5 mm) 5||122,0 g|
|Chain ring 30t||51,0 g|
|Chain ring 24t||37,5 g|
|Gearbox Spider 104 mm||40,0 g|
|Rear sprocket 26t||37,5 g|
|Rear sprocket 21t||29,0 g|