Questions tagged [drivetrain]
Questions about a bicycle's drivetrain system, including the chain, gears, chainrings, derailleurs, etcetera.
384 questions
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Replacing an old racing bike transmission : same component or newer ones?
I need to replace the complete transmission of a racing bike from the late nineties (Trek 2100 ZX carbon series) and wonder if I should better buy the same components (either new or in fair condition),...
- 141
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High Pitched Rattling in just one Gear
I have a 1x11 drivetrain. While pedaling in 11th gear (the smallest cog) there is a high pitched rattling/pinging noise. In any other gear, including 10th, there is no abnormal drivetrain noise.
I ...
- 1,459
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Matching crankset and chainring to boost cassette
I'm building my first non-child MTB with Chinese branded parts from AliExpress, because of the customizability (read price). I've already ordered the frame, fork, headset and hubs and I'm pretty ...
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Shimano Revoshift upshifting weird
I have a 7 speed Shimano Revoshift and whenever I shift up from 5th to 4th gear while going fast, it skips to 3rd gear, and then shifts down on its own. Any ideas what’s wrong?
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50 vs 52 chainring with chainstay length of 41.5 cm
I have a really nice Strong Frames Ti road bike set up with Ultegra R8000 11 speed, 11-32 rear and 52/36 upfront. I cross chain from time to time (I know, that's a whole different conversation). I ...
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Chain jamming between bottom of small front cog and chainstay during downshift [duplicate]
Pictures of the problem:
This happens when going up a hill after shifting to the largest (or second-largest) cog in the back, and then trying to shift to the smallest cog in the front.
It had jammed ...
- 2,285
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Can a 2x chainring be used as a 1x if the smaller inner chainring is removed?
I have a praxis 2x chainring that is 52/36. If I remove the 36T inner chainring and of course the front derailleur will the drivetrain work still? I am not sure if the chainring is too far out to be ...
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Why is the front chainring aligned with the center of the cassette, also for 1X?
When riding 1X drivetrain, mostly ridden sprockets are approximately within 1/3 distance from the smallest ones. For example with 12 sprockets this would be about 3-4-5th sprockets counting from the ...
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Shimano 105 FC-R7100 crankset on a 10 speed cassette
I have a Shimano Ultegra 6750 crankset with worn out chainrings that need to be replaced. A Shimano 105 12 speed crankset is cheaper and more readily available in my market than replacement rings. ...
- 81
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Bike squeaking when pedaling
Over the last couple of days my bike has developed a constant squeak when pedalling, which is annoying and sounds unhealthy. I've added some Fenwick all weather chain lube to the chain, but it's made ...
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Switching from a mainly Shimano Alivio 3 x 9 configuration to a mainly Shimano 3 x 10 configuration
Greetings to everyone and all from a newcomer to this forum. I have in mind the following hypothetical scenario:
a happy bike owner has a hardtail equipped with a Shimano Alivio 3x9 configuration (to ...
- 103
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Recently replaced fixed gear drive train and the chain has stretched 1/8th inch over 24 links in under 200 miles
I have a wabi classic. Over the last few months it became apparent that the drive train needed to be replaced. I would replace a chain and it would be badly stretched after a week or two (~100 miles). ...
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Cassette Lockring sizes
I replaced the 8 speed cassette (Shimano) on an old wheel with a 9 speed cassette (ZTTO).
However, the lockrings seem to be different sizes, in 2 ways:
The old 8 speed lockring had a shorter threaded ...
- 568
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What causes the Brompton shifter to "click" between gears?
What is the mechanism that causes the shifter in a pre-2017 M6R Brompton to "click" between the two gear positions?
I have a 2015 Brompton M6R. I was touring on this bike when I hit a pot ...
- 567
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Upgrading My Yuba Mundo V4 from SRAM X3 3x7 to Shimano CUES 2x11
I'm looking into getting better gearing for the Yuba Mundo V4 that I just got since even though the drive train works fine and doesn't have any issues, it's got less than adequate low gears, so to fix ...
