Questions tagged [crankset]

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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6answers
1k views

Would variable crank arm length be beneficial to a rider?

I was thinking it would be cool to have a bike where the crank arms can be adjusted automatically "on the fly", depending on load. If that is not so safe then maybe a manual adjustment that the ...
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2answers
503 views

How to properly gear compensate for short crank arms?

Is there a linear relationship between gearing and crank arm length? For example, on my multispeed bike, my favorite gearing is 34/20 which is 1.7 and with 26" tires, that is 44.2 gear inches but I ...
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1answer
343 views

Replacing 170mm cranks with 175mm

I have two bikes and one has a broken crank. The broken crank is 170mm and the cranks on my other bike are 175mm. Would I be able to use the 175mm cranks on my other bike to replace the cranks on the ...
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9k views

Difference between Shimano HG and XT cassettes

I'm looking to build a 1x10 commuter bike. Want to decide between these two cassettes XT series: http://a.co/d4ez069 HG series: http://a.co/j4z8KFn How do they differ? I still haven't bought ...
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2answers
817 views

Is it viable to use cottered cranks?

I'm restoring a Bianchi Sprint (~1975). It has a cottered crankset/bb. I was originally planning on replacing them, because we all know that cottered cranksets are junk, right? Well, they have a ...
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1answer
99 views

Crankset arms length and chainring for 5 year-old

My five years old little girl rides a BMX micro mini bike with 18 x 1" wheels. The original bike came with 130 mm crankset length, 38 tooth chainring and 14 tooth rear cog. However, looking at her on ...
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1answer
72 views

Gears keep auto dropping esp in hills

My bike is 10 years old and has Shimano ultegra triple crankset. Being my first road bike, I assumed it was my skill when the gears would drop on their own or kick the chain off. I took it in to shop ...
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1answer
163 views

Is SLX FD 675-B front derailleur appropriate for my bike?

It seems I've made a few 'tiny' errors when choosing components to upgrade my bike. The biggest issues I'm facing at the moment are crankset and front derailleur... Bike is Eyble Psych 4 Black ...
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1answer
2k views

How to identify where a creaking/squeaking sound comes from?

There is a creaking/squeaking (halfway between each, I would say) sound in my bike. Here is what I know so far: Happens during pedaling when the left leg goes down Only when I press sufficiently hard ...
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4answers
6k views

There is a grinding feeling at the end of my pedaling at high speed

I bought a road bike about 6 weeks ago, but I just only realised it now that at the end of my pedaling (when either foot pushes down), I can feel a bit of a drag/friction/grinding on either pedal. I ...
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1answer
851 views

3x8 to 1x8 (with expansion to 1x10/1x11 in the future)

I plan on converting my MTB fron 3x8 to 1x8. I plan on leaving the rear derailleur as it is, or I would prefer not to upgrade it to save money. My current crankset is a 3x8 square taper crank, I ...
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1answer
59 views

Handling Stability Parameters [closed]

I'm building my first bike: probably steel (easy to work with). 2X26" road tires. Full suspension. Will be used on sandy dirt roads, and paved streets with moderate incline. Want hands free option, ...
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1answer
407 views

Restoring Aluminum Cranks

Is it all right to strip and then anodize (at a shop, I suppose?) aluminum cranks? I'm trying to build a bike and I saw second-hand cranks on eBay. They look like they're fine except for the ...
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2answers
3k views

BB and Crank compatibility with Pressfit 86.5

The bike frame I'm buying says that It is Pressfit BB86.5 (road), What are my options in terms of bottom brackets and cranks? I would like to get a BB30 Sram Force crank is this possible?
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2answers
929 views

Is it possible to convert Deore Crankset FC-M612 to single speed?

I would like to change this crankset to singlespeed, it has 96 BCD so I was thinking to order bash guard replacing the 40t chainring. The bashguard is this one http://www.wolftoothcomponents.com/...
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1answer
244 views

Can this crank arm be saved?

Here's my drive-side crank arm, from the inside of the chainrings: First off, those are not chain ring bolts, they are rivets, argh :) It looks like the crank arm is fixed to the middle of the three ...
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1answer
739 views

MTB crankset change, large ring from 42 to 48 teeth

I have changed my front crank set from 42 to a 48 tooth ring. I am having difficulty setting up the front mech. The problem I am having is that the (don't know the name) tail? the box frame bit at the ...
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3answers
842 views

Am I using the crank extractor correctly?

I have this X-Tools crank extractor: X-Tools crank extractor tool for removing standard Square Taper and ISIS type cranks. Here's the end that pushes against the crank: Here's my crank: (it's ...
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1answer
4k views

How to pick a crank puller?

I need to get a crank puller for my square-taper spindle. There are several available on eBay and Amazon. What information do I need -- about the puller, my bottom bracket and my crankset -- to pick ...
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2answers
649 views

When did Square Taper Bottom Brackets retire from racing?

I haven't been able to find any hard data on this. I have the impression that most top-end bikes made the switch around the year 2000. It would be great if I could get an answer for both of these: ...
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1answer
845 views

Upgrading my Schwinn [closed]

I know I probably should not upgrade my Schwinn, but I have had it for a year and a half, got it from Walmart and no problems. I want to upgrade the parts on this the bottom bracket, the cranks and ...
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2answers
890 views

Shimano Dura Ace FC7900 crankset with 11 speed group?

I have a Dura ace FC7900 crankset and was wondering If I can use it on a bicycle with ultegra 11 speed group? The crankset I have is this one: http://www.bike-discount.de/en/buy/shimano-dura-ace-...
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1answer
983 views

Do crank arm pullers vary in sizes or there is just one size?

Just want to confirm if there are different types of crank arm pullers? I'm trying to order one and the contact person is telling me that he has one but for a road bike. Now I'm confused I thought ...
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3answers
145 views

Crank arm fell off

The crank arm on my bike fell off. How does one re-attach it?
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3answers
1k views

Native BB30 crankset or adapted Shimano?

I have a bb30 frame, and I need to change my crankset. However, I am baffled by the reviews online if it is better to get a native BB30 crankset, like SRAM Force 22, or an adapted Shimano Ultegra 5800 ...
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4answers
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Strange long squeal sound when I pedal hard - how to track this down?

It's kinda hard to describe but there's a sound coming from somewhere on the bike when I pedal hard - I can't figure out where it's coming from. It's sort of like a high pitched pig squeal. It started ...
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1answer
280 views

Left crank cracks when the left pedal is pressed

My crank has a little slack and cracks more and more when I pedal, but only on only with the left pedal. What could be the cause(s) of this ? Video of the loose crank: ...
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1answer
207 views

Replacement crankset SRAM 3x for 10 cogs

I recently changed the cassette/cogset and chain on my mountain bike (10 cogs, SRAM 2011 or 2012). The chain rings are worn out and when I stand on the pedals the chain slides pretty unpleasantly. To ...
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1answer
174 views

Crank set removal tool too small

My crank set removal tool is too small to screw into the arm. You can see the black space in-between the tool and the crank. Where can I buy the proper sized tool? Seems like all crank set removal ...
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1answer
954 views

135mm rear spacing with road crankset?

I am about to upgrade my CX bike from the old 105-5700 (10spd) to Rival 22 (11spd). I have all the parts already and while reading the crankset/BB (GXP) manual I noticed the following: Use the ...
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1answer
139 views

How do I remove this crank?

I'm a novice in the process of restoring a 1987 Raleigh Equipe. I'm managed to strip the rest of the bike but haven't attempted to remove the crank yet, can someone advise me on what tools I would ...
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4answers
497 views

Right vs Left Crank Power Transfer Efficiency

The drive-side crank of a bicycle must be more efficient than the non-drive side, right? Not only does the power not have to go through the BB, but the drive side is usually also attached to the ...
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1answer
2k views

Replacement for SR Suntour XCC, 48/38/28T, 170mm alloy crankarms?

I recently bought a revolution cross 1 and after a week I've bent the middle chain ring quite badly and the outer one a bit, I think by spitting a big rock out from the front wheel and unfortunately ...
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3answers
1k views

Wobbly splined cranks, yet bolts are very tight

I have a road bike with ISIS splined cranks. I've been noticing front derailleur rub lately, and when I took a look, both of my crank arms are wobbly. The retaining nut is very tight, so tight on ...
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3answers
2k views

Best way to get rid of a “squeaky” bike?

I'm a college student and my bike is part of my daily commute to class. However, last semester my bike began squeaking and the squeak got louder and louder as time went on. I tried spraying some WD-40 ...
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2answers
924 views

click noise from chainrings

I'm experiencing clicking noises when I put pressure on the pedals (either side). The bike is a CAAD12 105 (it has FSA chainrings). I've done some investigation to pinpoint the source of the clicking....
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1answer
590 views

New bottom bracket and crankset - what spindle length?

I have a bike that I'm doing up as a project and I need to replace the bottom bracket (old-school square taper). Since the front chainring (single, 46 teeth, riveted) is pretty badly worn I was going ...
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2answers
1k views

Better to go with a longer spindle length bottom bracket or shorter?

I have a 1987 Panasonic dx1000 that I am converting to a single speed. I was planning on replacing the bottom bracket. To get the measurements I measured the tube to be 70mm (2 3/4") and the spindle ...
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1answer
128 views

Compact crankset to 1x

My MTB has currently a Deore FC-617 2x crankset. I am looking what components I need to convert to 1x. Do I need to change the crankset, or simply getting a new chainring for my existing crankset will ...
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3answers
509 views

What parts needed with new chainring?

I've read that the chainring is that spikey gear wheel at the bike's pedals that the chain egages with. The teeth on that chainring are so worn on my bike that the chain jumps off depite adjusting ...
2
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3answers
590 views

Disassembling crank on a 2006 Trek Pilot 2.1

I'm trying to disassemble the crankset on my 2006 Trek Pilot 2.1; the bike has all OEM parts. The crank is a Bontrager race crankset, which I'm to understand is a a rebranded Truvativ crank. For a ...
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1answer
75 views

Do I need a different bottom bracket?

I have a road bike that has a triple chainwheel setup (48x38x28)in which the chainwheels are not replaceable. (Made by SunTour) The middle chainwheel has broken a tooth so the whole thing needs to ...
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2answers
129 views

Can I convert a 1x9 speed Madsen kg271 cargo bike to a 2 or 3 x 9?

I know most these days seem to want to go the other direction, but my partner would like more gears on this heavy cargo bike that can be tough to pedal uphill. I think the frame has all of the ...
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2answers
727 views

What is the advantage of a “compact crankset” vs changing a chainring?

It seems that I'm old (my last good bike had a 5-speed freewheel and shifters mounted on down tube braze-ons - they were indexed, though!), and I've been out of cycling for quite some time. I've seen ...
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3answers
448 views

Stripped threads on left crank on the first ride

I just purchased a new road bike and had a friend assist me in the assembly. There must have been a problem because it fell off after only 2 miles of riding for the very first time. I used a pedal ...
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1answer
275 views

What bottom bracket fits a Truvativ E450 crank?

My bike has a crank that is so cheap that you won't find it mentioned on SRAM's web pages. This cheap crank is a Truvativ E450, and it has a square taper bottom bracket that is worn out and needs ...
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1answer
8k views

Why is 53/39 known as “standard” for road bikes?

In common cycling parlance, 53/39 is referred to as "standard" gearing for road cranksets, and most mechanics or experienced cyclists will understand that if you say you have a "standard crankset", ...
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1answer
383 views

New bottom bracket, asymmetric cranks

I am seeking help for a "dilemma" I have with my upgraded bike. I have an old KTM Ultra Line (2004) that I have upgraded with a new chain wheel (FC-M590 48.36.26t), a Shimano BB52 bottom bracket (...
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1answer
81 views

How do I keep smallest gear on my crank shaft from contacting frame

I have an old Trek 8000 ZX that I am fixing up. I had to replace the bottom bracket and I believe I successfully did that. The bike did not have a crank set to work with so I salvaged one from a pile ...
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2answers
734 views

Cutting off welded crankarm

A long time ago, when I was younger and stupider, I decided to fix my creaking crank arm by welding the bolt. Yes, I know it was so damn stupid, but I thought that was the problem. I didn't use the ...