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2answers
96 views

chain jumping when puilling away in a higher gear

I replaced the rear cog as the chain I had snapped and I thought it had taken some teeth off. Now when I pull away in 1-3 gears it's ok, but if I am in gears 4-7 and I try to pull away ( say I have ...
2
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1answer
71 views

What is this cogset body?

I have some backlash (free movement) in my body of cogset, so I try to dissemble my cogset to discover this weird body: I'm trying to find a new one but I don't know how to call it. Any idea how ...
5
votes
2answers
168 views

What does “chain binding” mean?

I'm reading on chain tensioning, the generic idea is that if the chain is too loose it will fall off, if it's too tight it will "bind". I'm having an hard time understanding what "bind" means in this ...
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2answers
106 views

What does usually worn first, the chain or the cog?

I have an old bicycle that I would like to repair. Basically the chain is always "clicking/jumping" when I pedal. I know this is either a worn chain or cog. My question is what worns first? If it's ...
1
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1answer
1k views

Clicking noise coming from cog on fixed gear

Ever since I put my rear wheel on after taking it off, I have had this constant clicking noise from the cog. Here's what I know: It wasn't always like this. I rode for a few months with no ...
5
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2answers
211 views

Is the same effort required to maintain a set speed using different sized chainring / cog combinations with same ratio

If I have a bike with the same cranks setup with a 36t (chainring) / 12t (cog) ratio and the same bike setup with a 48t (chainring) / 16t (cog) ratio, would the effort required to maintain a set speed ...
0
votes
1answer
67 views

The spring in my front dérailleur is jammed

My front derailleur is jammed by dirt (grease + fine dust), because of this the gear doesn't shift perfectly and chain is thrown off the cog. The spring is a bit unreachable because the derailleur arm ...
1
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1answer
205 views

why do left shifters switch chainrings and right shifters cogs?

Can that be changed? Is it just convention? Is there any commercial bike that comes with a left-shifter that switches cogs?
1
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1answer
2k views

Can I replace only the smallest cog on my rear cassette?

I currently have a 12-30t rear cassette which needs replacing. While I'm at it, I really want to switch to an 11 tooth to get the extra 9% in top speed. But the problem is, even the most expensive ...
1
vote
3answers
333 views

I just replaced my cassette, do I need replace the 2 month old chain?

I replaced both my cassette and chain in July (2.5 months ago). For some reason my chain started skipping when I was in the smallest cog in back. I took it to a shop, they could not find anything ...
1
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3answers
153 views

Can I use an old cog for my new hub?

I have an old wheelset with a 16T cog. It's currently a 120mm flipflop hub, and I'm going to be replacing it with a 120mm coaster. The coaster hub that I want doesn't come with a 16T cog (only 14, 15 ...
1
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3answers
2k 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 ...
1
vote
1answer
138 views

converting to fixed gear, chain problem

I just got a 16 tooth and tried to put on the old chain, BUT while it fits on the pedal cog (46 tooth), it does not on the rear cog. How can I solve this? a different cog in the back or a different ...
1
vote
1answer
3k views

How do I install a fixed gear cog on a screw-on freewheel hub?

I'm converting my old favorit bicycle to a fixie, but the hub is obviously not made for a fixed gear cog. I've removed the freewheel (not sure if it's called that, the thing that spins backwards on ...
1
vote
1answer
7k views

What Are the Widths of Shimano 8, 9, and 10 Speed Cassettes?

I was hoping that someone could provide me with the precise Shimano road-bike 8, 9, and 10 speed sizes for the following: Cassette Spacer Width Cog/Tooth Width Maximum Chain Width
3
votes
1answer
1k views

Can't change into the largest sprocket on rear derailleur

I bought my first road bike recently, and I've noticed I can't change into the largest cog/sprocket on the rear derailleur because when I pull the shifter the chain is pushed into the side of the ...
2
votes
1answer
561 views

Best Cassette Cog Material

I am replacing my smallest cassette cog for the 3rd time. I have been using Harris Cyclery's Aluminum Cog Crupi's Chromoly Cog is about 3 times as expensive. Is that still worth it? Can anyone ...
4
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1answer
2k views

Why doesnt my chain fit on my cog?

I ride a fixed gear bike and I wanted to change the rear wheel, I'm sort of new to all the bike knowledge but i couldn't find an answer to this. i ride 46 x 18, i don't know if its good or bad, i can ...
4
votes
1answer
554 views

Can i use a 10 speed hubbed wheel on my 7 speed/cassette bike?

I ride a 2005 Claud Butler San Remo with a Sora 7 cassette on the back. My back wheel has broke and is not repairable and I have bought an Ambrosio WS23 Wheel (700mm) with Bianchi hubs which I believe ...
3
votes
1answer
802 views

smallest cog of cassette rubbing on seatstay

I built up a NOS late 90s steel frame with a similar era Campagnolo Chorus 9 speed groupset. Has gone well, except the stays/dropouts don't seem to quite like a 9 speed cassette. The second smallest ...
3
votes
1answer
250 views

Checking fixie for damage

This morning during my morning commute I had an unintended lesson in fixie skidding: I dropped the chain, it got stuck between the cog and the hub and locked the wheel. I'm not sure where that skill ...
2
votes
2answers
196 views

Need some experienced eyes on removing cog/rear wheel mechanism

I've looked all over the net and can't find the proper tool or D.I.Y tool to take this apart. It's a single speed (with a ratcheting mechanism), and I'm trying to take it apart to make it a fixie. In ...
3
votes
2answers
858 views

What is causing noise/vibration high power input on right hand (drive side) crank?

I am getting a repetitive grinding sound/slight vibration while fully mashing on my Kona-humu single speed. Description of Problem This grinding is more similar to what you would hear from an ...
5
votes
2answers
864 views

Can you reverse the sprockets on a cassette to lengthen its lifespan?

I know my bike's rear cassette needs replacing, but before I do that, is it feasible to dismantle the 8 sprockets to reverse their spin? Can you increase the lifespan of a cassette by letting the cogs ...
1
vote
1answer
3k views

Using a new chain on worn out sprocket?

I went to REI yesterday because my bottom bracket was creaking. I brought my bike with me so I could get the right tools to take it off, but while I was there the mechanic actually took the ...
1
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2answers
4k 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 ...
3
votes
3answers
392 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
votes
3answers
3k views

Is my local bike shop asking to much money to change a rear cog?

I normally have much love for my LBS, but I've moved recently and am a little unsure about this new one due to the fees he is asking. I have a flip flop hub with a fixed gear (18 tooth) cog on one ...
3
votes
3answers
8k views

Why is my drivetrain so noisy after replacing the chain?

I ride an SE Lager fixed. On the 30th of May this year I did a bit of an overhaul, replacing the rear cog, chain, wheels, tyres and brake pads. I measured the chain last weekend and discovered that ...