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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English vs Italian bottom bracket - chainline considerations
I'm planning a new build and for the first time, I'm working with a frame that requires an Italian bottom bracket. My question isn't specific to the build, but a general question about chainline.
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Single speed chainline
I have just finished my first fixed gear based on an old Raleigh Rapide frame. But the chain line is off and I hear a crackling/ticking noise when I pedal.
The wheels are replace with a gipiemme ...
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Does the BB axle (spindle) lengths 1:1 compare for square taper and octalink?
When measuring the axle length of a square taper bottom bracket, can I pick a new octalink bottom bracket with the same axle length?
I can think of some offset added or removed by the difference how ...
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Tandem drivetrain--right side front drive
From what I am reading, there are 3 attested tandem drivetrains:
1) crossover drive, with timing chain on the left, and main crankset and drive chain on the rear right. This seems to be most common.
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'1 1/8' vs '1/2 1/8' chain/chainring
Some 1/8 chains and chainrings are sold as "1/2 1/8" and some as "1 1/8". What is the first number describing?
My understanding is that practically all modern chains have a 1/2 inch pitch.
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Cross-chaining in terms of angles
I'm building a recumbent trike and have reason to have the rear cassette offset from the cranks.
At the same time, the chain is very long, so the offset is compensated. It looks like the chain will ...
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What is special about 1x11 - why not just big cassette and single front ring?
I currently ride a single speed belt Soma Wolverine with road bars, hydraulic disc brakes and I love it. Only trouble is my knees are telling me I need some lower gears especially up the hills. That's ...
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Converting road single speed bike to 1x
I have a very nice bike that I built from a vintage new steel frame, threadless bottom bracket (because of the french thread in the frame) and 110BCD crankset. It is currently mounted as single speed, ...
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What is required for a proper boost chainline on a 1x drivetrain - only a boost chainring or an entire crankset?
To obtain a proper chainline for a boost rear hub (~52 mm), is it enough to fit a boost (3 mm offset) chainring to a 1x crankset which is originally non-boost, or is an entire boost crankset required (...
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FSA Tempo crankset is not compatible with FSA Vero
I just purchased a new FSA Tempo Adventure JIS crankset - 46/30 to replace the FSA Vero Compact 50/34 JIS crankset on my 2018 Cannondale Synapse Sora 9 speed as I need lower gearing.
Both are shown as ...
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What went wrong with my bottom bracket spindle length calculation?
Here's the facts:
My bike frame requires a 70 mm Italian threaded bottom bracket
I'm going to use a Nuvinci N360 IGH which requires a chainline of 49 (± 0.5) mm.
I have Andel fluted cranks, which ...
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Chainline on a trek 660 fixie conversion
I am converting an old Trek 660 frame to fixie. It takes a 68mm bottom bracket and I'm putting in an SKF bottom bracket (like this) with both a BMX profile racing 110mm 46t and redline BMX cranks ...
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Adjusting chain line by mounting the chain ring inside the crank spider
Background: Sugino RD2 single-speed cranks call for a 103mm bottom bracket which gives a chain line of 45mm, which is what I need, but there aren't suitable square-taper BBs in this size. ...
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Is the Shimano 2303 crank arm and the 2300 crank arm the same?
I bought a Shimano 2303 crankset (52/42/34 triple) by mistake although I should have bought a 2300 crank
If I remove the inner 34t, will it have the same structure as 2300 crank? By structure I mean ...
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Bottom bracket length without knowing front chainline (fixed gear)
I'm wondering if I can find the right bottom bracket axle (or spindle, whatever it's called) with knowing my crank model (Gipiemme Dual Sprint, Velobase says BB should be 113mm) and rear chainline (I ...
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How much tolerance is acceptable on the chainline of a fixed gear conversion?
When converting a geared bike to fg/ss, at some point there will be adjustments to be made regarding chainline. Without getting into details about what could be made to make it better (bb axle width, ...
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What can I do to stop my front dérailleur rubbing against the crank arm?
I recently changed the crankset of my Cannondale Synapse 5 from the stock FSA Gosssamer crankset to a Rotor 3D24 crankset with power2max power meter. This was a bit of an iffy modification to make - ...
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Correcting the chainline on triple crankset with chainring spacers
I have Marin Four Corners bike with 3x9 Sora crankset (most likely FC-R3030) for which chainline is not given on Shimano site, but I've read all road cranksets have 45 mm chainline.
I would like to ...
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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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Abnormal wear on Gates Belt Drive CDX rear sprocket
I'm using a Gates Belt drive CDX setup with a Shimano Alfine 8 hub on a SOMA Wolverine frame. Over about 6000 km, I've worn out 3 stainless steel rear sprockets; the last one lasted only about 600km. ...
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SRAM dub crank chainline
Any SRAM experts out there?
Zero experience with SRAM dub. Used Hollowtech for years before...
Ordered SRAM GX dub crankset. Advertised specifically for 49mm chainline. Arrived pre-assembled with a ...
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SRAM Rival chainline on a 1x System, feeling the chain slipping into place
I have myself a SRAM Rival ETAP 1x Drivetrain and I am looking for advice here on a problem before I go to a Mechanic.
Is it right to feel the chain slipping into place on the Front Chainring (while ...
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Measuring chainline without cranks?
I just bought a 1970s Peugeot Mixte UE-18 for $10 at my local bike co-op. It's in great shape, but is missing the bottom bracket and cranks. I'd like to upgrade to a cotterless crankset. However, I ...
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Chainring offset - chainline - of Alfine vs. Ultegra/Dura Ace
I have a bike with Alfine 11 and belt drive. I think I could use a 175mm crank, certainly a 172.5, rather than the 170 Alfine comes in (height 6'1" frame size 60cm) and going a little lighter and ...
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What is causing noise/vibration high power input on right hand (drive side) crank?
I am getting a repetitive grinding sound/slight vibration while fully mashing on my Kona-humu single speed.
Description of Problem
This grinding is more similar to what you would hear from an un-...
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Chainline calculation
I need to replace my completely worn cheap cranks (not sure how those are called, but the chainring and right crank are one piece). The chainline of my singlespeed freewheel is approx. 43 mm. I have a ...
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Is the use of wide fatbike tires problematic with 100mm BSA bottom brackets?
Fatbike frames typically come with 100mm or 120mm BSA BBs. Does the 120mm BB help anything, though? For example, if I have a 100mm bottom bracket and a 5" tire on a 100mm rim, and I switch to the ...
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Alfine 8 vs Alfine 11 Gates CDX chainline?
I'm considering replacing a Shimano Alfine 8 hub with a Shimano Alfine 11.
The bike has a Gates CDX belt drive, and I want to retain the same belt, chainring and rear sprocket.
My understanding is ...
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swapping crankset and chainline compatibility
I'm looking into placing a power2max powermeter on my bike, which is full Ultegra equipped (R8000). Now, the chainline specs of the crankset from p2m are either 45mm or 46mm (depending on the brand of ...
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Is it safe to bolt my single-speed chainring to the other side of the crank?
Background: I converted a 21-speed bicycle to single-speed by removing the derailleurs and installing a single-speed freewheel and crankset.
The chainline is no longer straight, and I would like to ...
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Andel crankset, BB axle length and chainline
I was planning to buy an Andel Standard Track crankset. It uses 110mm axle bottom bracket, but the stock bracket on my bike is 103mm. Will this mess up my chainline?
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Changing the rear wheel offset to allow space for freewheel
I've had some new wheels built for a steel frame with a 126mm rear dropout spacing. The rear hub takes a 7 speed screw-on freewheel. At the moment the rim sits perfectly central to the chainstays when ...
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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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I want to convert a 1-piece crank triple chainring to a double
I want to convert a 1-piece crank triple chainring to a double. Do I need to worry about the chain line? Do I need a spacer of some sort?
Is this a simple swap of the chainrings? If not, what size (...
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Will two spacers between the cassette and the hub effect the chain line?
So I have a set of custom wheels (White Industries T11 hubs) and when the cassette is correctly fastened to the hub with the single spacer provided the cassette cogs can be moved in the direction ...
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Chainline issues
When my 10 year old chain snapped, I realized that I needed to replace my rear cassette and crank, due to wear. Noted for the future! I ordered a 9 speed cassette from Shimano (same brand and number ...
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Bottom bracket spindle length
I have a square taper (JIS) Shimano UN-55 bottom bracket with dimensions 68mm (shell width) and 110mm (spindle length) on my single speed (chainline 42-44mm).
Can a set of Stronglight JIS track crank ...
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Obtaining the optimum chain line
Ok I have a number of variables at play here and I'm trying to obtain the best chain line possible this is on my polo bike so not super important but if there is a way I can do it I'm willing to put ...
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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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Chain keeps skipping - did I cut it too short?
My old chain was skipping a lot, so I replaced it with a new one. The new chain barely skips at all, except for in the highest gears/smallest three cogs on the back cassette. The skipping comes ...
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Smaller chainring on the right side of a bigger one possible?
I recently converted my bicycle from a derailleur setup to an internally geared hub. During the conversion, I also replaced the previous crankset (with three chainrings) by a crankset having a single ...
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How to calculate what BB spindle length I need for a mystery crankset?
I'm building up a bike frame with spare/junk components to be my beater bike for commuting. It will be a single speed, chainline on my rear wheel is 42mm. I have a crank set to use, but I'm not sure ...
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Road wheel conversion to single speed wheel
I am looking to upgrade the stock wheels on my canondale caad10 rival. It came with a Fulcrum racing set. I was interested in converting this set of wheels for use on my single speed - a surly ...
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Front chainring and Rohloff IGH sprocket not exactly aligned
I ride a Bike Friday Pocket Llama with a Rohloff internal gear hub. I noticed that the front chainring and the rear sprocket are not exactly aligned.
As the Rohloff internal gear hub will stay the ...
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BB spindle length standard for single speed bike?
Is there a common spindle length for typical fixie/single speed bikes? Namely a bike with:
a 68 mm BSA bottom bracket shell
a square taper bottom bracket cartridge bearing
120 mm dropout distance
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Shimano R7000 front derailleur height adjustment
I’ve been getting a little bit of chain rub on the extreme opposites but that’s to be expected, however when looking at the front derailleur this morning after a quick clean, it appears it may be ...
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Will my chain line be affected if I use a BB386EVO crankset on a standard cartridge BSA frame?
https://www.ebay.com/itm/324064544587
FSA sells this which allows you to use BB386 cranks with BSA frames. Is the offset different enough between the two standards to cause problems with my chain ...
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How to adjust chainline for 2x10 crank set
I replaced my 3x8 system with 2x10 system on my Trail bike.
My BB is of 73mm size and as a standard I left one spacer at drive side and none at non-drive side of the chain-ring as of now. But I could ...
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Chain contact on rear triangle
Hi can anyone help with some advice. I have built up a 2007 specialized big hit 2 and fitted it with a 32t narrow wide chain ring as that is what I've been used to riding. It rides great it handles ...
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chain line with narrow-wide chain ring
I'm running a 1 x 10 set up on my mountain bike. Recently I noticed that when I'm on the largest cog, there is a lot of friction in the drive train and is choppy. I think this is due to the fact that ...
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