Questions tagged [chainline]
The distance between the bicycle centerline and the center of the crank. Can also refer to the distance to the center of the cassette. A drivetrain will be designed around a certain chainline. The advent of disc brakes has caused drop bar bike chainlines to move outward slightly.
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How to prevent chain from falling when pedaling backwards?
When pedalling backwards chain falls from front single sprockets.
It happens only when on rear cassette chain is on the smallest cog.
Any suggestion ?
Image shows a moment before the chain completely ...
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How flexible is chainline — specifically for SRAM Transmission?
I want to put a SRAM Transmission drivetrain on a drop bar bike. I want a bigger chainring than the Transmission cranks come with, probably 44t. There are plenty of places that sell 44t gravel/road ...
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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 12s crankset on 11s groupset
I have a bike with a full Shimano Ultegra 11s di2 groupset from 2018 (cassette and chain are fairly new.) The crankset right-arm was in the batch of the Shimano recall, although it passed the ...
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BB and crankset choice for BSA 68mm BB-shell
I want to replace the square taped BB (together with the crankset) from my old MTB. I am considering hollowtec BB and 2-piece crankset (with single chainring).
The BB Shell width is 68mm.
The old BB ...
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46/30 Crankset with Boost chainline (51,8)
I'm looking to ride a 148mm rear hub, i.e an ideal chainline of ~51,8mm but with 46/30 as I'm gonna usually ride Allroad (and Offroad only when it's not too muddy... 30 upfront und 42 in the back is ...
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Is an FSA Mego EXO compatible with a GRX
I replaced an FSA Mega EXO Crankset for a Shimano GRX FC-RX600 and SM-BBR60 bottom bracket. The reason I ask is that after installing the Shimano bottom bracket and crankset, I had to adjust the ...
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Wrong beltline with Gates S550 on Cannondale BadBoy
I need to rebuild the drivetrain on a secondhand BadBoy 1 with 8-speed Alfine and Gates belt I got last year. To move house I had to disassemble the crankset because the pedals had seized, and the ...
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front chainline adjustments for 42.5 rear chainline
I have a 42.5 rear chainline (12 speed sram eagle).
In the front, I purchased a eewings-mountain crank.
According to the docs, the offset is (55-chainringoffset).
If I get a 6mm offset chain ring, it ...
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How have gravel bikes been able to accommodate 2x drivetrains with wide rear tires?
Moving to one-by drivetrains on MTBs (which enable lavishly wide tyres of 2½″ to 3″) was motivated by the simplicity of shifting on technical terrain.
But when gravel bikes were introduced, a common ...
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Shimino FC-C201 Replacement
I'm looking to replace the FC-C201 on a 2000 Diamondback Crestview, which uses an RD-C201, FH-RM40-8 rear hub (135mm), and CS-HG40-8I cassette. I've measured the bottom bracket at 68 x 122.5mm. The ...
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Running DUB wide crank with 52mm chainline
I have a set of sram xx1 carbon cranks that are DUB wide. My bike (2023 Specialized Epic Evo) is DUB crank 52mm chainline. If I add BB spacers to the DUB wide crank and use a 6mm offset chainring ...
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How does SRAM adjust rear chainline for their "wide" front drivetrain
SRAM's new "wide" cranks (available on some 2x and XPLR (aka 1x) models) push the chainline out 2.5mm. They say this is compatible with existing cassettes, xDR hub bodies, 135/142/boost hubs....
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Replacement BB chainline check?
I want to replace a bottom bracket (to add a torque sensor for a recent ebike conversion). Current BB spindle length is about* 114mm, replacement is 127mm. So, all else equal, we're talking about ...
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BB86/92 spacer hollowtech Ultegra 8150
I'm having some issues on my new road bike which I am setting up. It's a Canyon Ultima CFR frameset which came out of the box with the handlebars, Dura Ace 9200 wireless shifters and brake calipers.
I ...
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