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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38 views

Hollowtech 2 cranks and bb how good they are?

I have been commuting by a bike for 6 months on a 9 speed bike. It has a standard squared taped BB and cranks screwed on it. Now I have heard those Hollowtech 2 cranks and BB and how they can improve ...
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32 views

Finding a replacement crankset (and maybe a bb to go with)

I am in need of replacing my crankset on my hybrid discovery 401 - although all that is left of the 401 now is the frame and the bb/crankset. it has a sealed bb 113/68 square taper. I am struggling ...
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45 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
54 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
36 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 ...
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96 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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76 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
26 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
157 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
87 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
143 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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134 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
71 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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1answer
87 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
94 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
122 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
37 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
98 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
33 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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3answers
91 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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1answer
317 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
152 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
112 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
179 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
134 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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1answer
122 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
145 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
7k 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
881 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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0answers
25 views

How to switch from a double to triple crankset [duplicate]

What do I need to change out on a bike to move from a double to a triple crankset? In this particular situation the bike has STI shifters and a FSA Gossamer, 50/34 teeth crankset currently. But I ...
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1answer
137 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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784 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
389 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
455 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
232 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
198 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
156 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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3answers
334 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 ...
1
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1answer
524 views

Chain not fitting chain ring

I just bought a 21-speed hybrid bike (Wal-Mart grade Schwinn) and to try to customize/simplify things (other bike is a fixie road bike), I removed the front deraileur and bought a new single-speed ...
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1answer
40 views

assembling brackets and front crankset: how many spacers and orientation

Recently I bought a Bull's Black Adder 1 26 Inch frame and quite some time ago got a present Shimano Deore Lx FC M-583 crankset (brackets included). I know they are not a perfect match, but still ...
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1answer
130 views

Can an IGH have the same maximum overdrive-ratio as a crank-sproket setup?

Is there an IGH that gives one the maximum overdrive-ratio that one might get with a 39-53T crankset and a 11-34T freewheel? If not, what is the mechanical roadblock in making one ?
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1answer
275 views

Will this crankset fit my bottom bracket?

I've got a 2004 Trek 4300 that I need to replace the crankset on. I was able to look up the bottom bracket size here and see that it's a 73x122.5. I'd like to buy this crankset but I'm not exactly ...
2
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2answers
558 views

Single speed crank compatibility

I am attempting to build a single speed bike for commuting from various spare parts. I'm unsure of what kind of crankset would be compatible with my frame. I have read from a couple sources that I ...
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1answer
195 views

Unbranded cranks vs FSA Vero cranks?

What is the difference between the unbranded-cranks found on the Motobecane- USA- Mirage Sport vs the FSA Vero cranks(sometimes LSC) on the Motobecane-Record or Grand Record? Are they basiclly the ...
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0answers
251 views

Low gearing setup for road bike with Shimano dual control

Question: What is my best bet for a crankset, given the following requirements for a road bike I am setting up: 68mm "English" thread bottom bracket Shimano STI "brifters", 2x10 (I already have ...
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1answer
244 views

Picking a crankset for a 107mm BB on a downhill bike

I bought a downhill frame (Commencal DH Supreme 2012) that I want to build up with parts myself. Now I'm trying to pick a suitable crankset for the 107mm bottom bracket. Having a hard time finding ...
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1answer
217 views

Peugeot PX-10 with Shimano 105 Triple with BB-6700

Upgrading my french PX-10e with shimano 105 cranks. What bottom bracket can I use with this 68mm bottom bracket with french threading? Is there a threadless BB available?
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1answer
156 views

What kind of crank extractor do I need

I'm trying to swap the cranks on our Thorn tandem and would like to know what kind of crank extractor (if any) I need for the job. Is there a way to tell from this photo, before I've taken it all ...
5
votes
3answers
5k views

Replace crankset or cassette for better road performance on an MTB?

I few years ago I got into cycling again to help keep fit. I still had my mountain bike from when I did some easy trail riding. I'm mainly riding on the road now and I was wondering if I can change ...
4
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2answers
351 views

Crank arm snapped: what could have caused it?

Recently, on my single-speed bike, the right crank arm just snapped. Was slowly going up a hill, and all of a sudden it broke in two pieces. I have now exchanged the entire crank & chain set ...