The crankset is the combination of components that convert motion from the rider's leg movements into rotational motion to drive the chain and propel the bike. The crankset includes one or more chainrings (sprockets) and the two cranks, or arms, to which the pedals are attached.

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331 views

Crank fell off square taper BB. Should I replace bottom bracket

After years of use and multiple retightenings my crank will fall off my bike about once a week and definitely needs to be replaced. I believe that the square hole of the crank has expanded to the ...
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1answer
823 views

Technical documentation for Shimano FC-M510

I'm having a hard time finding the technical documentation (equivalent of https://www.dropbox.com/s/yx5hq4cezpdz641/alivio-crankset-service.pdf?dl=0) for the Shimano Deore Hollowtech 1 crankset, ...
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1answer
74 views

A gap in the hole when inserting JIS square BB to a Truvativ Crank

I push the BB inside a crank hole without any tool but I expect a few milimeters gap. The Truvativ crank definitely uses JIS interface, but the question is: DOES the gap make any problem? or is it ...
6
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2answers
487 views

What is “crank preload”

I'm in the middle of swapping my BB30 cranks from stock FSA Gossamer to a (shorter length) SRAM BB30 "IA" S950. The S950 has a "crank preload" adjuster on the NDS which the spindle is also attached ...
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1answer
524 views

Is there any reason I can't convert a 36/46 to a 36/52 chainring?

My commuter bike is a converted cross bike (really just a cross bike with a rack on it). It works great, but I occasionally wish I had a higher top end gear. The crankset that came on it is a 36/46 ...
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1answer
65 views

Shimano XT with Campag Centaur crank?

I would like to use a Shimano XT group for my flat-bar disc-brake touring bike, but the XT crankset doesn't suit my touring needs very well. I would prefer having a 50/34 crank instead of the XT's ...
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2answers
490 views

Replacing Sora crankarm

so I accidentally screwed the wrong side pedal into my left hand crankarm on my Giant Defy 3 2014, and I have been looking to buy a replacement part myself and get a mechanic to install it. I am ...
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2answers
1k views

Creaky crank problem: Campag 11sp Athena crankset (Ultra torque)

I have an awesome Ridley Noah carbon frame, fitted with Athena Campag 11sp groupo. Recently it's been making a lot of creaky and "pop" noises as I ride up hills (putting more force on the crank ...
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2answers
158 views

How to avoid getting swindled when buying used cranks?

I'm looking for a cheap, used set of cranks for a bike that was fished out of the garbage :) Because the cranks won't be on a bicycle when I go buy them, how can I tell if they're bent or not? I'm ...
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2answers
248 views

How much assembly is required when an LBS orders a bike?

I'm looking to order a Marin Lombard Elite from my LBS but I want to replace the FSA BB and crankset with Shimano or SRAM parts, and change to a 52/36. When my LBS orders it, does all of that come ...
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0answers
735 views

Replacement crankset for Shimano SG B 52/39?

I have a very basic Specialized Allez (XL frame) street bike (pictured in my avatar) with a cheap SG B52/39 chainring needing replacement (warped and wearing out after two years of daily use). But ...
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1answer
129 views

Scott Mountain bike. Problem with pedaling

Last 2 runs out my bike I have as suffered from what I can only describe as the pedal free wheeling ie pressure put on pedal does not drive the bike, but after a couple of turns it then drive the bike ...
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2answers
670 views

I have a broken my drive side crankarm - what do I need to do?

I recently had to dash home for a minor emergency. I noticed that one pedal was a bit wobbly but I had no choice but to push on. Once I got home and the emergency had been dealt with I noticed that my ...
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2answers
301 views

Older XTR cranks - replace or adapt?

I've been using Shimano XTR cranks since my bike was assembled in 2002 (fc-m952?). I've replaced the rings a few times in the past (though not in several years) but it appears that these cranks were ...
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1answer
312 views

What to consider when looking for a chainguard?

Alright, the inner seam of my jeans is about done for, and I'm worried that I'll take a nasty spill the next time my pants get caught in there. Given that I don't want to wear gaiters or Lycra, I'm ...
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2answers
218 views

24t or 26t granny gear?

Getting a new crankset, decided on this one from Rivendell: http://www.rivbike.com/product-p/cr1.htm Question: Should I keep the 24t granny or get them to swap it out for a 26t? I have some concerns ...
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3answers
347 views

Problem with inside of shoe clipping crank arm

Crankset http://velobase.com/ViewComponent.aspx?ID=c50c795c-1016-4021-8ae8-9f68450fde36 and I know I'm using the right bottom bracket (119mm) The pedals ...
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1answer
51 views

Crank type for an old peugot

I'm renovating an old Peugot and need to replace the crank. It takes a clotted crank however I'm not sure on the size. I brought a crank previously and it didn't fit, I couldn't get it on the bike ...
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2answers
1k views

How to find compatible cranks?

The threads on both cranks got busted due to putting the wrong pedals by the shop (here is my post with details) so I need to find replacement. How to find compatible cranks? My bike is Carrera ...
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4answers
3k views

Crank threads stripped - both pedals fell off

Something really strange happened to me - 2 years ago I bought a bike (Carrera Gryphon Hybrid from Halfords). I had just about 100 miles on that bike the month I bought it and than I locked it to a ...
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2answers
196 views

My bike Crank is making noise like Tuk, Tuk… once or twice when I pedal hard

I get a sound from my crank as if something were about to break to pieces when I stand and pedal hard.
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0answers
95 views

Don't know spindle size?

I'm not quite sure what size my spindle is on my giant downhill bike. I bought it a while back and it hasn't caused any problems. I've only recently taken up making it look good. All I want is 2 ...
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2answers
127 views

My crankset stops the pedals from turning when I tighten it onto the bottom bracket

This sounds like a stupid question however, I'm pretty sure I took these cranks off my current set up before. I wanted to ask if there is such a thing as a spacer on the bb axel ever that I might be ...
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3answers
614 views

Can I fit 3 x9 speed crankset to 3 x 8 speed cartridge

I have a Merida hybrid cycle fitted with Shimano XT Deore 3 x 8 speed (42/32/24T). The crank has a few worn teeth and I would like to replace with Shimano XT Deore (48/36/26T). The seller states this ...
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619 views

Right crank (Drive side) on the left?

So, I wonder what happen if I replace my left crank with another right crank (either Square tapered or ISIS splined wouldn't matter). What is the disadvantages apart from: 1) the pedal thread ...
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2answers
56 views

Changing '75 international to clip in pedals and shoes

I have developed foot issues because my stiff insoles don't do me much good on the bike, especially if I stand to go up hills. So I think I need to switch to clip ins with good stiff shoes (Bont ...
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1answer
765 views

How to remove crank arm with broken bolt on SRAM Omnium crankset

I apparently over-torqued the crank bolt and it made a loud snapping sound. Now the hex wrench just spins freely and so I can neither tighten nor loosen the bolt. How do I remove the (non-drive side) ...
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1answer
793 views

Loose axis of Shimano Deore FC-M591-S Hollowtech II

I noticed that the right arm (drive side) of the Shimano Deore FC-M591-S Hollowtech II is getting loose. The right side has the axis attached to it as shown in the image. When I take off the left ...
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1answer
291 views

Is it possible to change a Shimano FC131 crankset's chainrings?

I'm going to buy a bike wtih this crank, but I want to change the bigger ring. This is one of the lower end shimano cranks -- so I am worrying that the chainrings may not be replaceable. Thanks ...
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3answers
430 views

Can I change my large chainring without changing the entire crank?

The bike I wanna buy has a 42/34/24 crankset and TX-50 FD, now I was wondering if I could install a 48t(or bigger if possible, do tell) ring upfront while keeping the rest (i.e transforming it to ...
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1answer
338 views

Can I fit a 105 crank arm (stages) to a Claris 2400 crankset?

I currently have a Specialized Secteur with a Shimano Claris 2400 crankset (compact). I'd like to buy a Stages power meter but they do not sell Claris crank arms. Can I simply put a 105 crank arm on ...
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2answers
721 views

What are the advantages of 4 arm cranks for road bikes?

Are 4 arm cranks the future for road bikes? What are the advantages?
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2answers
211 views

Old bike - what can I use for crank replacement?

The LBS doesn't have anything in stock to replace the crank on this bike : What is this type of crank and does anyone still supply them?
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2answers
6k views

Will a 9 speed crank work with 10 speed groupset? [duplicate]

Will this SLX 9 speed crank work with newer 10 speed groupsets? It looks to me that 9 and 10 speed cranks are the same. Or am I missing something? Are the spaces between the rings different?
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1answer
303 views

What's this noise? Is it from my crank?

I have recently been riding bmx, racing to be more specific. I ride around my neighborhood a lot when im not at the track and have noticed this loud clanking noise. I didn't know where it was coming ...
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4answers
386 views

Loose pedal bent under pressure

I was riding home today (with clipless pedals; SPD) and noticed my ankle was twisting strangely with each rotation of my legs. I had just gotten to the top of a massive hill. I pulled off to the ...
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1answer
26k views

diference between 170mm 172mm 175mm crank arm length on road bike [duplicate]

What is best for which use, advantage, or application, especially for climbing.
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3answers
994 views

Replacing bottom bracket on 98 trek 820

I'm trying to replace the bottom bracket assembly on my 98' trek 820. The current one grinds and needs replacement. The bracket that came in it is a shimano bb-ct92. I've looked online and can't ...
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3answers
2k views

Can I use a Shimano 105 10 speed BCD 130mm 52t chainring as a replacement in my 9 speed tiagra triple crankset?

I currently run Tiagra triple 9 speed crank, 50/39/30 The BCD on the 50 being 130mm. I'd like to replace the 50t with a 52t to make it 52/39/30. I'm looking at a Shimano 105 52t chainring but it says ...
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1answer
622 views

What is the crank length on a Shimano Deore XT?

I have this bike: http://www.trekbikes.com/int/en/bikes/mountain/cross_country/superfly/superfly_9_8/ Frame Size is 17.5 Crank is: Shimano Deore XT, 38/24 I purchased a garmin edge. It asks for ...
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1answer
148 views

Peculiar feel when pedaling

I ride an early 90s Scott Unitrack CST with the original Shimano Deore drivetrain it came with. Same as this one. When pedaling, the right pedal has a peculiar feel like a sudden inward jerk at a ...
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4answers
7k views

What is the effect of changing length of crank arms?

There are some length options for the crank arms - like 170mm, 175mm. What is the difference for the rider? In which way does it effect the commute? Tried looking at Selecting the right crank ...
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2answers
2k views

how many spacers do I need for a 83mm bottom bracket and a 142x10 hub?

I have a Zee crankset on a 83mm bottom bracket (downhill bike). The Shimano manual says to use two 2.5mm spacers on the drive side, and one 2.5mm spacer on the non-drive side. However, this presumes ...
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1answer
617 views

MegaEXO Omega BB and Hollowtech II crank compatibility?

I have a Giant TCX SLR 2 (2014) with a FSA MegaEXO BB and FSA Omega crankset (46/36). I just purchased a Ultegra 6750 crankset (50/34), can I run it on my existing BB? If not, what BB do I need? ...
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1answer
2k views

Replacement chainring compatibility

I have a Fuji Absolute 3.0 (about 2011) with a generic crankset. The triple chainrings are stamped with 'SAMOX'. It is a 30-42-52t set. I favour the middle chainring, which is now badly worn and needs ...
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4answers
9k views

Noticeable clicking from crankset or bottom bracket

A few days ago I began hearing a clicking noise coming from the crankset and I can also sense a slight hitch when the right crank is at its upmost position just when it's about to go down. The ...
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1answer
452 views

can you put a shimano XTR M980 175mm stage power meter on a XT M785 175mm setup?

I would like a stages power meter on my set up but cant figure out if the bottom bracket sizes are correct and if even the new crank will fit at all?
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3answers
269 views

Can I modify the gearing on a 2009 Jamis Aurora?

I have a stock 2009 Jamis Aurora. I'm looking to modify my gear set-up to make climbing hills with large loads a little easier on my knees, as I constantly find myself wishing I had one or more low ...
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1answer
6k views

Using a Sram 22 group with 10 speed crank

I have a SRAM Red 22 group set that has a standard crank (53/39), and I also own a SRAM Red 10 speed crank with compact chainrings. I'll be doing some climbing soon and would like to use the compact ...
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3answers
831 views

FSA Compact 50/34 Need better climbing

I have a FSA compact crank 50/34 with a 9-speed 12-27 cassette. I need better climbing ability for steep grades, not concerned with flat top speed. What should I do? What is the largest size cassette ...