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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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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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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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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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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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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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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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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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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Rear wheel not aligned with frame but cog and crank is aligned
My bike was previously a 26er mtb 3x7speed and I converted it now to be a single speed freewheel bike.
Is the bike safe to use if the rear wheel is not straight to the frame? It is closer to the drive ...
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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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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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Fixed gear bike chain alignment
I have recently converted my old early 90s 18 speed Peugeot road bike to a fixed gear.
The chain is clicking when pedalling and is out of line by about 10mm as you can see in the photo.
The rear cog ...
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Single speed crank chainline calculation
I apologise ahead of time for yet ANOTHER single speed chainline/crank compatibility question.
I have a Genesis Day One 2013. According to online sources the crankset for this bike is the Driveline TX-...
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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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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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Ultegra R8000 crank spacer
Does the Hollowtech II Ultegra R8000 crankset need to use spacers?
I just converted my bike from Praxis to Shimano (finally I have the whole groupset!). I had to replace the BB and cranks (duh) for ...
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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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Need to choose crankset for 135mm rear hub of MTB
I replaced older 8 speed cassette on my Cannondale Trail with new Shimano Deore M6000 10 speed cassette (11-42). But since the axle spacing is of older type, want to get a matching crankset (2x ...
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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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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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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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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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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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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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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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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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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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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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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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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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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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BB spindle length/chainline for re-used Shimano FC-M391 chainset
I'm trying to rebuild an old Univega MTB. Primary goal is to build a good or decent bike from used parts.
The crankset+bb that was on the bike when I got it was really worn out. I unscrewed it and ...
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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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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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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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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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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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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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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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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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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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'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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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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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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