The cogs (gears) at the front of your drive chain, connected to the cranks.

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3
votes
3answers
337 views

Chain slipping on middle chainring

I have recently replaced the chain and the cassette. Previous chain never slipped. I never had any problems with it at all. But I have made about 10 000 km on it and the wear was beyound any limits, ...
4
votes
1answer
53 views

Front derailleur rubbing against chainring

I'm trying to fix up my old (1999) Trek 4500, and I've run into a snag while adjusting the front derailleur. It's a Shimano FD-CT92 (bottom bracket mounted E-type), and it's rubbing against the ...
1
vote
1answer
176 views

Are 130 BCD chainsets stiffer than 110 BCD?

I would expect the crank spider not to sacrifice much stiffness in expanding from 110 to 130, but the chainrings seem flimsy in comparison. Do I buy extra stiffness by using a standard chainset ...
2
votes
3answers
251 views

How to measure chainring / cog wear?

Other than attempting to estimate whether a chainring or cog is worn and needs replaced by eyballing it, is there any way to measure the wear on chainrings or cassette cogs so you can determine ...
10
votes
4answers
370 views

Why use multiple materials on chainrings?

Why is it that on a typical mid-level road triple crankset, the outer rings (larger rings) will be aluminum, while the inner ring (small ring) is chro-mo? It seems to me that if aluminium was good ...
0
votes
1answer
102 views

Swapping chainrings on old ultegra crank

I have a 2002 Ultegra 9-speed triple with 52/39/30(?) chainrings. I swapped out the inner two chainrings twice and kept the original crank and 52-tooth ring. The 52t ring only gets used going downhill ...
1
vote
2answers
92 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 ...
3
votes
0answers
95 views

Chain falling off inner chain ring no matter how L screw is set

Bike is a relatively new Cannondale Carbon Synapse with the Ultegra 6800 groupset (although front chainrings are FSA). Has about 1000KMs on it. Bike has been great, but I went out on a ride today ...
7
votes
1answer
235 views

Do I need to get a replacement bike for this broken chainring?

I wanted a cheap commuter bike, and just received this bike from Amazon. I have little knowledge about bikes, but looks like the middle chain-ring is broken to me. Is this indeed broken, or is it ...
2
votes
1answer
81 views

Can I swap down to a different number of teeth on a chainring

I currently have a single speed front chainring setup with 52 teeth. I can't find a suitable replacement for my chainring so I am wondering if it is possible to get a chainring with a different ...
1
vote
1answer
84 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 ...
1
vote
3answers
182 views

Can I replace the front front derailleur with chain guide?

My front derailleur (Shimano LX T670 / 34.9mm) has been stuck on the highest gear for a couple of weeks now which has got me thinking about how little I use it. To save weight could I replace my front ...
1
vote
3answers
97 views

How to get a lower gearing

My trusty old CF racer was stolen the other day, and I'm looking for a replacement. I saw this bike at PlanetX and was intrigued. It's a full carbon bike with (last years) Ultegra components for a ...
3
votes
3answers
268 views

Replacing a chainring - what did I do wrong?

TL;DR I thought I could figure out repairs myself but clearly I'm a moron. I replaced the chain and chainring on my fixie last Saturday, and this morning it got scary loose on me. I started to feel ...
1
vote
2answers
285 views

Why use 54T (or bigger) chainring?

In time trial races, I see people are using these big chainrings. Is 50/11 combination doesn't give enough top speed? What's the real advantage? I can only think of the negative, which is it makes the ...
1
vote
1answer
448 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 ...
0
votes
1answer
60 views

Restoring the original color of metal and chainrings

I bought a used bike and I want to pimp it up and make it cleaner. I found rust on the chainrings and I would like 1- to remove it and 2- get the original color of the metal back. How to do that? Here ...
2
votes
1answer
100 views

Will I snap my derailleur? (too large front chainwheel)

I have an old racer (1994 Specialized Epic Allez - lugged carbon) that's in pretty good shape. I brought it to an LBS that's got a pretty good reputation and that I've used before, to change the chain ...
1
vote
1answer
252 views

Replacing SRAM Red chain set with Ultegra - bottom bracket?

I have a cyclocross bike with an Ultegra 6700 chainset and a road bike with SRAM Red. I'm looking to get a Stages Ultegra power meter (left crank arm mounted) that I can swap between both bikes. This ...
0
votes
1answer
63 views

Triple chainset to single chainset; BB compatability?

I'd like to upgrade the chainset on my GT Avalanche 1.0 2013 so I have no front mech or shifter and just one ring on the front; just 10 gears instead of 30. My current chainset is a Shimano M522 ...
1
vote
1answer
357 views

Going from a 1x8 to 2x10 setup

After using my bike for a year I feel that although I enjoy the simplicity of a single chainring setup, I would prefer a more versatile 2x10 setup and would like to move to it. Currently the two ...
1
vote
1answer
224 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 ...
1
vote
0answers
98 views

Chain drops in smallest gear under load

I'm baffled. I installed a new chain, cassette, cables and housing yesterday. On the stand, all is happy and shifting is silky smooth. On the road all seems happy except on the bigger cogs in back (in ...
3
votes
2answers
343 views

Replacement for 52 tooth chainring Ultegra triple ( 6503 ) 9 speed

Hello It seems that the stock 52t chainring for a road triple ultegra 9 speed is on back-order or has been discontinued. Is there a replacement that will fit and shift? This is for my wifes Trek and ...
4
votes
3answers
651 views

Fixed Gear Chainring Centering

I have a fixed gear bicycle with a chain that gets periodically tight and loose as I complete a rotation of the pedals. How do I center my chainring so that the chain has even tension throughout?
4
votes
2answers
497 views

Why does the chain tension vary as pedals are turned?

I have a new single-speed bike (after purchase this year, it was unused in a garage for a few months), but as I turn the pedals, the tension in the chain varies noticeably. What should I check, ...
0
votes
1answer
274 views

Can I change chainring size on a dirt jump bike?

I don't know the name of it but there is a part on single speed bikes. The gear? I think right where the crank is connected. Well on bmx bikes and especially dirt jumping bikes it is really small and ...
1
vote
0answers
172 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 ...
0
votes
1answer
151 views

Alfine 11 chain guard

I'm planning to invest into a Alfine 11 set (both hub gear and crank+front cog(45)). I'm also looking for solution for chain guard for Alfine cog for commuting. I've found Curana brand that makes good ...
5
votes
4answers
805 views

Can I increase my highest gear ratio?

I have a modern bike (ridgeback meteor '13) and It currently has a 21 speed shimano chainset. I find that going down hills (which I do a lot) and on flats I need a higher gear. Can I do anything to ...
5
votes
4answers
1k views

What causes chain suck?

Specifically when changing gears from middle chain ring to smallest, the chain will sometimes get 'sucked' up between the inner chainring and chain stay. It seems to happen more often in muddy ...
3
votes
4answers
1k views

Bottom bracket with built-in internal hub - does this exist?

I've heard that one can install a bottom bracket that has what is essentially a built-in internal hub, giving one the ability to add a virtual double chainring where there's only one. This would be ...
2
votes
2answers
1k views

Removing SRAM Red Chainrings

This is almost certainly very simply, but how do you undo the chainring bolts on the SRAM red chainset? I can fit a 5mm (or 8mm can't recall now) hex head into the black screws, but they just spin on ...
2
votes
1answer
120 views

How do I tell if a loose chain is because of the chain or the ring wearing?

My chain looks as though it's 'stretched' - by the time it's fed around the large front chainring it appears to be 'longer' than when on the other chainrings. Therefore I'm trying to work out whether ...
4
votes
4answers
668 views

What's the correct position to assemble eliptic (Biopace, Rotor, etc) chainrings?

If you take a regular, "classic" road chainring (130bcd, five arms), you have five possible positions to assemple it in the crank arm. This can even be used to "rotate" between different positions ...
26
votes
12answers
25k 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 ...
6
votes
2answers
278 views

At what point does one need to replace a chain ring on a mountain bike?

The large chainring on my mountain bike is missing a number of teeth on one side (apparently the side I like to go over rocks on). Is it harmful to the drivetrain to ride without these if I'm not ...
3
votes
1answer
135 views

Why are chainrings 50T and larger five-bolt rather than four-bolt?

I've noticed that chainrings 50T and larger all use five bolt holes instead of four, invariant of BCD. How come? Is this simply due to tradition or is there a mechanical stress reasoning?
3
votes
1answer
349 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 ...
5
votes
1answer
204 views

Chain Ring Bolts

Having a strange problem removing my chain ring bolt. problem is there is nothing to hold the back piece with because its perfectly rounded/flat, so when i turn the front the whole piece rotates. what ...
7
votes
2answers
3k views

Is a 7 speed chainring compatible with an 8, 9 or 10 speed cassette and chain?

Currently I have a 7 speed cassette (13-23) running with a spacer on a new Tiagra hub. After I changed my chain, the wear has made two of the gears unusable. I am considering changing the cassette to ...
1
vote
2answers
174 views

chainrings matching up to crank arm?

I have a 9 speed specialized sport comp road bike. my chainrings are 50 x 34t and i wanted to possibly change them to a 53 x 39t to increase my speed. it has shimano cassette/components and a ...
11
votes
4answers
5k 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 ...
1
vote
3answers
1k views

Clicking noise from crankset

A month ago I bought a Scott Aspect 60, and for about a week everything was ok. Then, I started hearing a noise coming from the crankset. First thought was that it was the front derailleur - after ...
1
vote
2answers
631 views

Mountain bike crankset chainring compatibility

I have a Shimano Deore LX crankset. I would like to replace the outer chainring. What manufacturer chainrings are compatible with my crankset ? My outer chainring takes all of the abuse, due to ...
2
votes
1answer
108 views

how to fix gear ring that over-jumps

I am pretty new here, and I am not acknowledged with the bicycle terminology in English, so this topic might be a duplicate. Sorry in advance. So, when I put more pressure while pedaling, the chain ...
5
votes
1answer
279 views

Number of gears for a racer

I am looking to upgrade my racer, I currently have a Bottecchia racer from the mid-80s and it has 14 gears. While looking around for newer racers I noticed that a number of them had 20 gears while ...
2
votes
1answer
375 views

Are these chainrings the reason my chain skips/hops?

When I ride my bike normally, then chain skips like crazy. I know it skips in the front because I stuck some paper in the chain to see if it moved and it didn't. Chainrings:
4
votes
3answers
5k views

Can I replace chainrings without replacing the rest of the drive train?

I now ride a 60cm SurlyLHT with chain rings at 26/36/48t. Can I replace with a smaller set at 22/32/46t (or similar combination) without having to replace the entire drive train - cassette, rear ...
1
vote
2answers
233 views

Does new chainring require change of other parts?

I'm thinking about changing my 2nd chanring to a smaller one (2 chanring setup). I hear most people recommend to change the chain when changing the cassette. Hence my question: should I expect to ...