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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54 views

What direction are the threads on Ultra Torque bearing cups?

I need to remove the bottom bracket bearing cups from my 2010 Athena groupset. Do they both unscrew anti-clockwise, or is one side different (and which one)?
3
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4answers
571 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 ...
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 ...
3
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2answers
645 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 ...
3
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3answers
293 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 ...
3
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4answers
6k views

Replacing Crankset. Do I need to replace chain? Then do I need to replace cassette?

Over the past year, my road bike's crankset has gotten pretty bent up and out of wack. Not due to abuse, just wear and tear I guess. It's pretty bent and has a nice wobble that I can see as I look ...
3
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3answers
88 views

Crank axle cracked on 1972 Centurion, looking for guidance on how to replace

As I said, I have a 1972 Centurion. Today while riding I hit a pothole as I was coming down on my left pedal. I immediately felt like my pedal was moving around in ways it shouldn't. Stopping to look, ...
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3answers
7k views

How to fix a stripped pedal crank

The threads on my bike's pedal crank just became fully stripped and the pedal fell off, though the pedal itself is fine. Is there any way I can fix this without fully replacing the pedal crank?
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3answers
76 views

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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2answers
601 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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3answers
393 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 ...
3
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4answers
5k views

What cassete do I need to run with a compact crankset (50/36), to equal the same gearing as running a standard crankset (53/39) with a 11-28 cassete?

Every new bike in my price range comes with a compact crankset, which I want for climbing, but I race and I need to keep the same top speed that I've had for sprinting and descending (I live in the ...
3
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1answer
109 views

Will this power2max power meter be compatible with Cannondale Synapse?

I have a 2015 Cannondale Synapse - specifically, this one: http://www.swiftcycles.co.uk/334/products/2015-cannondale-synapse-carbon-105-6-road-bike.aspx. I would like to add a power meter, and ...
3
votes
1answer
959 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 ...
3
votes
2answers
60 views

Converting triple crank to single or double

I got triple crank (44-32-22) and 3x9 speed drivetrain. What will I need and is it possible to remove some of the chainrings and convert the crank to single or double? Will I need new parts or ...
3
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2answers
152 views

Can you use a wide range 11-42 cassette with a double crankset

Can you use a 10 or 11 speed wide range (11-42, 10-42, or 11-40) cassette with a double crankset? I know these wide range cassettes are typically built for a 1x setup on a mountain bike, but is ...
3
votes
1answer
201 views

Upgrading crankset on mountain bike - what are my options

I have a cheap old rockrider 5.0 mountain bike also known under the btwin brand. Bit by bit I'm trying to improve it's performance as a road commuter bike. So far I've changed the rear wheel to a ...
3
votes
1answer
81 views

crankset compatability

I am wondering if I would be able to run the 105 5800 crankset with my 9 speed ultegra 5600 shifters/rd? I don't have the funds to do the whole groupset at once, and I believe upgrading to 11 speed ...
3
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1answer
43 views

Double crank to single?

I just wanna know if I can take off one of the chainrings for this crankset before I buy it off craigslist. Thanks!! enter image description here
3
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1answer
1k views

Can I replace a 3-gear crankset with a 2-gear one cheaply and efficiently?

My commuter bike (a cheap-ish MTB) is in need of new gears. As I never use the "granny chainring", I was thinking about switching to a 2-piece crankset, to save tome weight. However, I am unable to ...
3
votes
1answer
40 views

Can I replace the crank on a Raleigh m20 with one from a Schwinn Ranger?

I have a Raleigh m20 mountain bike with a messed up crankset. The only other crankset I have is from a Schwinn Ranger. The two cranksets look like they are the same size. Is it possible to install ...
3
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1answer
237 views

I can remove crank arms without a crank puller, is this a problem? I'm worried the crankarms might be loose

Currently, I'm little bit worried about the compatibility of my crankset and the bottom bracket. The crankset is Truvativ Isoflow, the BB is BB-UN55 (Square taper). Yesterday, after the bike hit +1400 ...
3
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2answers
235 views

Can pedals not fit the crankset?

I just ordered and received my bike with FSA Tempo CK-200 crankset and Shimano Saint MX80 pedals (really good deal). Just received and it seems that they do not fit with crankset! The spindle on ...
3
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1answer
887 views

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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1answer
2k views

Shimano chainring / crankset compatibility

I discovered a Shimano FC-2300 Crankset (175-mm 52/42/30T 8 Speed) for $62 on Amazon - is this compatible to replace my old FC 3301/3304? The longer story is I need to replace my Shimano chain ...
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 ...
3
votes
1answer
488 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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3answers
118 views

Larger sproket on a single speed crankset?

I recently bought an urban bike that comes with a single gear crankset with a 42 tooth sprocket and an 8 speed rear with 12-36 teeth. I would like to swap out the front sprocket to a larger one to ...
3
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1answer
249 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 ...
3
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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 ...
3
votes
1answer
160 views

Should I grease pins when re-installing them on cottered cranks?

I'm restoring a vintage Peugeot with cottered cranks. When reattaching the cranks to the bottom bracket spindle, should I grease the pins or put them in dry?
3
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1answer
272 views

Help me to attach inner ring

I have cranks with 4 holes for outer and middle rings attachment. There are no holed for inner ring attachment. On my other bikes crankset middlering has 8 holes 4 for cranks and 4 for inner ring. I ...
3
votes
1answer
512 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 ...
3
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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 ...
3
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2answers
347 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 ...
2
votes
2answers
5k views

Things to consider when upgrading crankset

I am considering upgrading my crankset, or rather I am considering considering to upgrade it. I would like to gain a few teeth since I am permanently riding on the 48/13-15 making the 38 pretty ...
2
votes
4answers
334 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 ...
2
votes
3answers
604 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
votes
2answers
506 views

What do you call the crankset system type on the Sram Apex?

I see these everywhere, but no one can come up with a consistent name for them from company to company. GXP is the closest I can come to a name for the bottom bracket. ...
2
votes
4answers
994 views

deore LH crank on 105 chainset

I have a 105 triple chainset (hollowtechII) and the left hand side has developed a crack. Now I can't find any replacement 105 LH cranks but there are some Deore ones on the ebays that aren't too ...
2
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1answer
55 views

When pedaling forward my bike suddenly disingages and goes limp

My Ridgeback Velocity bicycle suddenly disengages and goes limp and loose when pedalling forward, similar as if I'm pedalling backwards.
2
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2answers
95 views

Does anyone know of a machinist who could convert a dual ring Campy Nuovo Record chainset ('spider') to accept a 3rd chainring?

I have a 1971 Raleigh International whose Campagnolo Nuovo Record chainset has Campy pedals that are 'frozen' into their threads (I know, this is an instance of neglected maintenance). I really like ...
2
votes
1answer
7k views

Why does my non-drive side crank arm come loose?

I tighten the bolt super hard. Ride for a while. Then it comes loose again. I don't know if its my BB or the bolts. How can this be fixed??
2
votes
1answer
1k views

How do I re-attach a crank that has fallen off?

I have already read My crank fell off, how do I re-attach it?, but it did not answer my question. I was biking up a hill in first gear, and I felt my left crank was a bit loose. Never having had ...
2
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2answers
1k views

What are the current options for short crank arms?

I have knee problems, and I've noticed that the seat position that makes it possible for my leg to not be absolutely straight at the bottom of the stroke causes my knee to pop up a bit higher than my ...
2
votes
1answer
64 views

Can I use a SRAM X0 Crank with Shimano XT chain rings?

I have a SRAM X0 crank on my MTB, and I want to buy some Shimano XT chain rings from a mate. Will they fit? Or is the BCD, Spider shapre, bolt size etc incompatible. All are 10 speed.
2
votes
1answer
119 views

Touring Drivetrain Dilemna

I own a 2015 Specialized AWOL Elite and love it except when I am fully loaded and lumbering up a pass. I'm looking for a way to get more range without completely replacing my drivetrain. This ...
2
votes
1answer
56 views

Orienting Shimano Cup and Cone square-taper bottom bracket spindle

Let's say you were servicing a Shimano adjustable bottom bracket and forgot which way the spindle was originally oriented. You also forgot your ruler. How would one correctly orient the spindle (so ...
2
votes
2answers
369 views

8 speed free wheel with single speed crankset

I would like to change my bike setup. I have a 8 speed freewheel and a 3 chainrings crankset and I would like to add a single speed crankset in front (around 50 teeth) because I am not using my front ...
2
votes
3answers
295 views

(racer) Standard vs compact crankset: Increased leverage for same gear ratios true?

I'm a road and mtb regional racer about to have a go at my first road endurance nationals very soon. I'd like some educated scientifically validated answer on a matter that has been on my mind ever ...