The drivetrain consists of the parts that drive the bike through the efforts and input of the rider and include the cranks and bottom bracket, chain rings, front & rear derailleurs as well as all the small linkage and operational parts such as derailleur pulley wheels & hangers, chains, links, pins, cables, rear cassette & the gear shifters attached to the handlebar. These are all the drivetrain.
The choice of components and specifications of each piece of the drivetrain can be quite specific and while some parts can be easily swapped and replaced, other parts, and the choice of component brand and drivetrain system can make it a more complicated decision or selection process.
If you need expertise allow the service experts @ Livermore Cyclery provide advice and assitance in finding the right parts and service needed to keep you on the road or trail.
- Shimano Dura Ace R9170 Di2
- Shimano Ultegra R8050 Di2
- SRAM Red eTAP Wireless
- Campagnolo Super Record EPS
- Campagnolo Chorus EPS
To find out more about converting a manual drivetrain to Di2, service and installing, or purchasing bikes with Di2 please check out our electronic drivetrains page.
Gearing Adaptation - Mountain and Road
Although there are some hardcore riders still rocking a fixed gear, a vast majority of us take full advantage of newer technology that allows us to use a variety of gears to assist our cycling performance. Bicycles for all disciplines have advanced quickly in the past 30 years, and with such great leaps forward, it’s sometimes difficult to keep up with the times. One of the biggest developments has been the drive-train, with gears that allow you adjust the effort needed to confront and ride various inclines.
However, if you do long distance cross-country riding, you’ll need a wider range of gears, a 2 or 3 chain ring set up would be advantageous to ensure you power through those climbs, and descend quickly on the other side. A common triple ring arrangement is: 42 – 32- 22 with an 8 or 9 speed cassette in the rear. Typically a range of 12T – 32T, or 11T – 34T. This is considering that a majority or cross-country riders prefer a 29″ wheel-size for their bike. Having a wide range of gears available offer greater clearance, and variety for the rider to find the right gear for them.
Since the introduction of the 11 speed cassette, many of the newer mountain bikes that are hitting the market have a 1×11 drive-train already set up. This will usually include a single chain ring in the front, ranging from 30T – 34T, and a 10 or 11 speed cassette in the rear. Typically 10T – 42T in range.
The benefits of having a 1x drive-train is that is saves on weight by not having the front shifter, front mech, additional chain ring. It adds more simplicity for maintenance also.
1x11 vs 2x10 Getting your gear ratios and combinations set-up correctly requires some trial and error to find the right fit for you, taking into consideration variables such as riding style, discipline and wheel size. Switching from 20 gears to 11, you'll lose some fine-tuning some of the gears on the top or the bottom end of the spectrum. For example, a 2x10 setup could include 22-tooth and 38-tooth chainrings on the front, and cogs on the rear cassette that range from 11 to 36.