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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2k views

Removing bottom bracket from 79 peugeot frame

I would like to remove the bottom bracket from an old french peugeot race frame. I believe the frame was built in 79 judging by the decals and stamp on the bb. The bottom bracket and spindle at the ...
22
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7answers
2k views

Are Z-shaped cranks a good idea?

I've stumbled across this kickstarter project, which promotes an original shape for cranks: They claim a wider arc of useful push during rotation. While their main point is rendered moot by ...
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1answer
491 views

Right crank arm feels uncomfortable

After a loose bottom bracket and some prevailing knee pain I have made a few adjustments to the bike. I have managed to greatly reduce the pain in my left knee but the right still has some pain. I ...
3
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2answers
1k views

Attaching crank arm with Shimano SLX M660

Firstly, apologies if this question has tones of frustration, my new crank set and bottom bracket has never been installed correctly, so I am going to do it myself. Should the drive spline on the ...
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1answer
2k views

The pros and cons of crank self-extractors

I'd like to know more about the reliability of self-extracting crank bolts, but haven't found much information on how they perform (or how they don't). My interest stems from touring and ...
3
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1answer
847 views

Can't remove crank arm on older Mercier

I'm rebuilding an older Mercier and have decided to tackle the bottom bracket. I've read a few articles and watched a few videos on how to remove the crank but none of them look anything like what ...
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1answer
649 views

Lowering the gearing on a Shimano biopace double

My bike has a 52/38 Biopace pair on a 5 bolt 130 crank (Shimano 105). I want to reduce the pedal load because I'm getting older and live in hilly Wales, UK. I have bought a 42/28 Biopace pair. ...
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4answers
10k views

What should a big guy look for when buying a road bike?

I'm 6ft 4" (1.8m) and 22st (139kg). I do a fair bit of cycling, mainly spinning and mountain biking. I would like to get into road riding so I'm looking to buy a road bike. I want to spend between ...
6
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3answers
2k views

Solutions for pedals screwed in the wrong sides?

I have a Focale44 fixie with a single speed on the other side of the gear (this is called a flip-flop I think?) and I LOVE it so far! I've ridden it for about six months and haven't had to fix ...
2
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1answer
280 views

Problems with gears after re-attaching front chainring

I had to remove the pedal crank arm together with the front chain set when fixing a bottom bracket problem, but now that I've re-attached it, gear changes in my front derailleur are completely off. ...
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2answers
677 views

Converting crankset from 28-38-48 to 30-39-53

My current front setup is a 28-38-48 crank with Deore XT shifter & derailer. In addition to a FD-443 and top/bottom-pull converter, what else will need to be purchased for proper shifting? Also, ...
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1answer
460 views

Short cage derailleur: how to find out maximum sprocket differences?

I'm building a kind of new bike and would like to put a triple or compact crankset on it. I've still got this NOS huret derailleur set (front, rear and shifters) laying around which would match the ...
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3answers
940 views

Noise from crankshaft spindle and then the pedal falls off

In the last 6 months I have been getting really bad noises, creaks, clunks, etc coming from somewhere around the spindle connecting to the crankshaft. Every time I put pressure down on the left hand ...
3
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4answers
511 views

Trick or tool to help line up 48 splined crank arms

Besides eyeballing it and comparing the line to the seat tube, are there any tricks to getting 48 splined crank arms perfectly aligned? I must have spent a solid 15 minutes looking at them from every ...
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2answers
3k views

Can I use an “8 speed compatible” crank such as Shimano FC-2303 with a 7 speed Shimano MF-HG37 freewheel?

I have a 2004 Giant Cypress I use for commuting, and the entire drivetrain is very worn out (shark teeth and chipped teeth, front and back). I need to replace the Shimano MF-TZ20 7-speed (14-34t) ...
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4answers
14k views

Can any bike crankset be exchanged for another?

I have a Specialized HardRock from the '90s. It's seen better days, but I got it for cheap. I had a bike shop look it over, but for some reason the guys missed the rounded off teeth on the front ...
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1answer
482 views

What crankset should I buy to suit an 8 Speed Campy freehub?

I've just bought a pair of campagnolo/mavic wheels without a freewheel. I'm finding it very hard to understand what will fit on the rear hub. It's English thread, does this mean that any 8 speed ...
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2answers
3k views

Will 10 speed cranks work with an 8 speed freewheel?

I'm looking at building a road-bike, and I've just purchased some wheels with campagnolo hubs, with an 8 speed freewheel on the back. Can I use Campagnolo Daytona / Veloce cranks on the front? I ...
2
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1answer
771 views

Can if fit new 105 5700 cranks on my existing 5600BB?

I am refreshing my drive train. I have been running a full 105 5600 set for a couple years. I have an ultegra cassette and chain ready to fit, and I am consdiering crankset/chainring options. Is the ...
4
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3answers
933 views

Crank arms are not parallel to each other. What could have caused this?

It is a cottered crank. Crank arms themselves don't seem to be bent. It is a non-cartridge style spindle. Any ideas as to why they are not lining up?
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2answers
3k views

Will a hollowtech shimano BB fit a bike which currently has an octalink bracket?

I have a mongoose otero elite 2008 and the crankset is broke (wobbling) It's also bent, so time for a new one. I currently have a nice shimano deore crankset from an old bike, but it uses a different ...
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2answers
224 views

Is there a way to know what size of smallest chainring will be compatible with a given frame?

I've been slowly changing a Devinci Milano I bought to be more like a touring bike than a hybrid. I've installed drop bars and sti shifters. Everything is working pretty well, except that I'd like to ...
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3answers
389 views

Single Chainset

just wondering if there is much point in having a tripple chainset on my MTB, I very rarely change gear on the crank and I feel like having a single cog would make the bike lighter and also tidier as ...
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1answer
261 views

FSA GOSSAMER ROAD CRANKSET with BB7800?

Can FSA GOSSAMER ROAD CRANKSET be used together with BB7800 Dura Ace from Shimano ? Thanks
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2answers
3k views

Stationary bike “clicks” when pedaling - crank axle is moving sideways. How can I fix this?

I've got this stationary bike, a York C202, which has developed a problem - namely it "clicks" when pedaling. This is highly annoying, as there's nothing I seem to be able to do about it. I diagnosed ...
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2answers
1k views

Can I run a dual crankset with a chain guide tensioner?

We recently got a new mountain bike for my son via craigslist, it is a couple year old Transition Bottle Rocket and came with a E-Thirteen SS+ chain guide/tensioner. He would like a lower gear for ...
26
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15answers
41k views

Triple vs Double chainring?

I'm bike shopping for my first road bike, and I've asked for a lot of advice from my father who was a serious cyclist once upon a time. After showing him one prospective bike, he dismissed it with a ...
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2answers
1k views

What road double cranksets will work with a 108mm JIS square taper bottom bracket spindle?

So far it seems like the Shimano Sante or Suntour Sprint cranksets are the only ones that would fit my bottom bracket spindle (I am hoping to keep both BB and spindle). Am I missing any possible ...
4
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3answers
2k views

How do I remove these crank bolt plugs

I have an old 10-speed bike (presumably 80's vintage). I'm trying to remove the bottom bracket and cranks but have struck a problem. The crank bolts have a plastic cap over the top of them and I'm ...
3
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1answer
485 views

Older road bike: squeaky crank?

I have an old Free Spirit road bike. It's in good shape and runs fine, but I started noticing that when I'm going uphill or pedaling in a high gear there is a squeaky sound coming from what seems to ...
3
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4answers
5k views

My crank fell off, how do I re-attach it?

I was out riding on my mountain bike when my crank unexpectedly fell off (video). How do I reattach the crank? There's a torque range specified (25-30 Ft-Lbs): how critical is this? I don't own a ...
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4answers
866 views

Cruiser bottom bracket is clicking and grinding

My Trek Pure Deluxe 3-speed cruiser has been making a clicking noise when riding for some time. The problem is faint, and is more felt than heard. However, it's been getting worse; it now makes a ...
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3answers
589 views

Are there research graphs for the Rotor Q Ring system?

I was looking into Rotor Q Ring system that supposedly increases power by 4% which is rather significant especially when climbing. It should shave off quite some time off your resulting time due to ...
2
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1answer
661 views

ideal dérailleur height for a Deore on non-round/oval Cranksets (e.g. a Biopace)?

Reading on every site about front dérailleur adjustment, the distance from the bottom of the outer dérailleur plate to the bigger crank cog should be "one penny". Mine is around 1cm! it does shift ...
2
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2answers
2k views

Does anyone have experience with Bottom Bracket Tap/Facing sets?

I'm interested in recommending my boss get the workshop in which I work a bottom bracket tap and facing set. As it's quite an investment it's important to me to know what you're getting for your ...
2
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3answers
1k views

How do I remove a pedal from a crank with a crossed thread?

I've part stripped, and ultimately crossed the thread on my crank and can't remove my pedal now. This was done whilst riding and then trying to remove the pedal from the damaged crank. I figure the ...
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4answers
6k views

Advantages of higher quality cranksets

What are the advantages of upgrading the crankset on a bicycle? For example, my bike (2009 Kona Dew) comes with a FSA Dyna Drive crankset. I'm assuming this is a pretty basic crankset since it lies ...
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2answers
608 views

How does a crankset removal tool work?

I don't have one to examine. How exactly does a crankset removal work? one such as this.
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2answers
641 views

How to get enough leverage to remove pedals when their cranks are not attached to a bike?

I'm trying to troubleshoot a weird barely-felt click on my cruiser. The nest step of the process is to swap out the pedals and see if the problem goes away (if not, the problem is likely the bottom ...
3
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2answers
337 views

How can you tell how far apart your chainrings are?

I just replaced my cassette and my crank with one from the LBS that the guy said would work. I've had no problems with the cassette, but the crank is too wide so that my front derailleur does not ...
6
votes
5answers
27k views

Clicking sound coming from pedals/pedal spindle/crank

I recently bought a Trek 4300 series MTB, but after only several weeks of use, I'm getting a clicking sound coming from both sides of the pedals. It seems particularly pronounced when more torque is ...
2
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1answer
1k views

Replacement for Suntour NCX-410 crankset on commuter bike?

I've had a 2007 Marin Larkspur which I have been using as a commuter and recreation bicycle for 3.5 years. For the past year, I've been slowly learning to do my own repairs and upgrades as they have ...
8
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1answer
957 views

How can I keep my chain from derailing from the front sprocket under load?

I've watched the chain derail from the front sprocket, and there is considerable flex that is causing it. I'm a big guy with an athletic build (6'7"/280lbs), and it's a big-box bike, so I'm not ...
11
votes
7answers
20k views

How to remove a crank arm with stripped threads?

A friend called me up yesterday after a mis-adventure during his attempt at a bottom bracket overhaul. He stripped out the threads on the (left) crank arm while using a Park crank puller. In a pinch, ...
11
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4answers
6k views

Differences between Biopace and Rotor cranks

On mountain bikes of a certain age, "Biopace" chainrings are ubiquitous. These chainrings are (purposely) not circular. It seems that most people today agree that Biopace rings didn't live up to the ...
13
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4answers
16k views

Do Pros use compact cranksets?

Do pro riders use compact cranksets for hilly races? I'm trying to determine if switching to a compact double will mean I don't have the top end speed to be competitive in higher levels of racing (I'm ...
4
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2answers
3k views

Changing sprocket sizes: will front derailleur still work?

I have a hybrid, which for better or worse, I am going to use as my commuting and conditioning bike for the foreseeable future. I am interested in changing the largest chain ring for an even larger ...
9
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7answers
14k views

What range of sprockets is useful in a road bike cassette?

My road bike currently has a 27/39/53 crankset and a 13-26 cassette, both of which need to be replaced. I occasionally find myself in both extremes—while heading up the very steep hills of the Bay ...
4
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1answer
487 views

What MTB 10 speed double cranksets exist with 180mm cranks?

I am looking for a a 10 speed dual crankset that has 180mm cranks. I see the SRAM cranksets only come in 170 and 175mm.
19
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2answers
924 views

Selecting the right crank length

What is the best way to determine the correct crank length for my height and more specifically my leg length?