Mountain Bike Drivetrain Explained

Shimano s mountain bike groupsets go all the way from the kind of kit you d find on entry level off road and hybrid bikes up to specialist set ups for extreme downhill racing. What s a modern day mountain bike without a groupset. Here we look at each series and explain what they can do.

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They are usually referred to by the smallest and largest cogs to provide an indication of the total range e g.

Mountain bike drivetrain explained. Thought of as the bike s engine room a groupset comprises of brakes and the drivetrain. In association with shimano. Mountain bike cassettes can be found in 7 through 12 speed versions. The easiest gear of an eagle drivetrain paired with a 34t chainring is easier than the easiest gear on a 1 11 sram drivetrain with a 30t chainring while the highest gear is the same as a 1 11 drivetrain.

The drivetrain consists of the cranks chainrings front cogs chain cassette rear cogs derailleurs and. Thought of as the bike s engine room the drivetrain consists of the cranks chainring s front cogs chain cassette rear cogs derailleurs and shifters. Toothed ring at the front end of the drivetrain attached to the crank. Chainline affects drivetrain life which in turn affects long term shifting.

The american brand was behind the ground breaking 12 speed eagle mountain bike groupset that made the single front chainset all but standard on the trails within just a few years. Well it s a frame suspension fork wheels and control items but it s not a bike it s nothing more than a fancy scooter. Switching from a regular 11 speed drivetrain to a 12 speed drivetrain like a sram eagle or the new shimano xtr you technically don t gain just one but two additional gears. Despite many switching over to 1x many are still holding true to 2x systems.

Mountain bike drivetrain components explained. Shifting explained for beginners if you. A local bike shop will run through this with you. So neil and scotty are here.

However this is a much longer more detailed discussion when talking exact numbers because of different rear hub spacing road road disc mountain fat and tire chainstay clearance. Sram s mountain bike groupsets are big on innovation and even bigger on performance. The cassette is basically a pile of different sized sprockets that make up one half of your gear system. What s a modern day mountain bike without a groupset.

Well it s a frame suspension fork wheels and control items but it s not a bike. Shop shimano components acera catalogue number m390 shimano does produce cheaper non series general purpose components but acera is its entry level. This is partly covered here for modern mountain bike spacing and here for fat bikes. It s the modern debate in the mountain bike world.