33 votes
Accepted

Are single chainring mountain bikes usual?

A 1x drivetrain (single chainring) is pretty much the standard now in mountain biking - you will notice the rear cassette is much wider than the classic 3x7 setup you are used to. The wide rear ...
Rider_X's user avatar
  • 30.6k
33 votes
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Was I just sold a used cassette?

In all likelihood, the cassette is new. The cassette is manufactured this way. The difference in teeth shape and depth is to assist the chain take-up when you change gears. Look for wear marks on the ...
mattnz's user avatar
  • 50.5k
23 votes
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What are the disadvantages of having an old, worn cogset?

As a chain wears out, the distance between links gets bigger (this is what chain wear tools measure). As this is happening, the chain will grind the cogs to match the worn chain (distance between ...
Carbon side up's user avatar
17 votes
Accepted

What are the ridges seen on sprockets and chainrings for?

They are there to help facilitate shifting. Basically, the ramps you see help when going from a smaller to larger sprocket by catching the side plates of the chain to help the chain be pulled up onto ...
Batman's user avatar
  • 46.2k
17 votes

Are single chainring mountain bikes usual?

My understanding is that performance-oriented mountain biking has evolved to take on tougher and more technical terrain. If you design a bike specifically for a 1x drivetrain, then all else equal, it ...
Weiwen Ng's user avatar
  • 31.4k
15 votes
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Should the chain diverge that much?

Yes that's completely normal. You have one chainring and it has a fixed position. You have 11 gears on the rear, and only one of those could have "perfect chainline" All the rest are ...
Criggie's user avatar
  • 124k
12 votes
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Does effort require to pedal depend on the gear ratio or the gear inches?

Gear inches. Gear inches are, for better or worse, the most commonly recognized way of making the kind of comparison you're trying to make here, which one is harder to pedal. Gear inches are simply ...
Nathan Knutson's user avatar
12 votes
Accepted

How worn is this chainring?

Shows some wear, but looks OK. All teeth look symmetrical and so do the spaces between them. Really worn teeth look like a swept back shark dorsal fin or develop a visible burr. Do a Google image ...
Argenti Apparatus's user avatar
10 votes

Which jockey wheel on top?

Here's a photo of RD-M970 from behind. As you can see, the slotted (guide) pulley goes to knuckle and solid one (tension) to the bottom of cage. I'd align the arrows with chain movement direction that ...
Klaster_1 Нет войне's user avatar
10 votes
Accepted

How do I properly torque a track cog lockring?

A torque specification is not just a torque-spanner setting but a physical property. That is, there are many ways to apply the correct torque. In this case it means more or less: pull it as tight as ...
gschenk's user avatar
  • 9,660
9 votes
Accepted

Convert the number of teeth in a chain-based drive train to the number of teeth in a gates-based drive train

You just need the same tooth ratio. The fact that it’s a belt drive with a different tooth size/shape doesn’t change anything about it. There will be some size/availability constraints (since you can’...
Michael's user avatar
  • 27.4k
8 votes

What are the disadvantages of having an old, worn cogset?

I've done the opposite to a lot of riders - I had a chainset of unknown mileage and rather than guess, I simply rode the whole thing into the ground. Shifting got progressively worse over time, but ...
Criggie's user avatar
  • 124k
8 votes

Are single chainring mountain bikes usual?

The configuration is not unusual at all. It has even become quite common, the smaller front ring and the quite wide ranging cassette for decently spread gearing. It also brings a gain of weight, ...
Carel's user avatar
  • 8,289
8 votes

Are single chainring mountain bikes usual?

this bike has an 11-42t Microshift cassette with 11-13-15-18-21-24-28-34-42 cogs typically previous 9-speed drivetrains used an 11-34t cassette 11-13-15-17-20-23-26-30-34T. which was updated to 11-36t ...
thelawnet's user avatar
  • 4,230
7 votes
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What does marking like "aq/ar" on the sprocket mean?

This has nothing to do with dates. Shimano introduced cassettes on their road racing groupsets first. I.e. Dura-Ace. The first Deore XT lacked this. The first Shimano MTB cassette was CS-M732: https://...
thelawnet's user avatar
  • 4,230
7 votes

Can an individual gear/cog on the rear cassette be replaced?

According to the late great Sheldon Brown, yes you can change an individual sprocket in a cassette, at least for Shimano. Some cassettes have small bolts or rivets holding the gears together, but ...
rclocher3's user avatar
  • 2,651
7 votes
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Possible to identify sprocket without taking the bike apart?

To answer the question as asked: You'll have a Shimano Nexus gear hub, so you need a sprocket compatible with that. (Any reasonably competent mechanic should have been able to tell you that!) ...
Argenti Apparatus's user avatar
7 votes
Accepted

What is the top sprocket?

In that context, Top sprocket is the smallest one on the cassette, which gives you the Top or highest gear. (You would think they would match terms Low and High or Top and Bottom.)
mattnz's user avatar
  • 50.5k
7 votes
Accepted

How do I remove the rear sprocket from a Gates Belt drive system

It's probably stuck because it's digging in to the freehub body splines. Install just the lockring without any spacers. Use your cassette lockring tool to immobilize the freehub from turning, and use ...
Nathan Knutson's user avatar
7 votes
Accepted

10-teeth/9-teeth Sprocket Efficiency Losses

Looking at the big picture, at 44kph on flat, for a rider producing 400W, drivetrain losses represent only 5% of the total losses (the rest being shared between aero 86% and rolling resitance 9%). ...
Andy P's user avatar
  • 18.3k
6 votes

What is causing the chain skip after chain replacement?

Yes, the stretched chain wears the chain ring and sprockets to match its pitch. It's recommended to use a chain gauge (such as this one by Park Tools) so you can replace your chain before it's ...
David Richerby's user avatar
6 votes
Accepted

Upgrading Gates CDN to CDX-EXP

regarding the amount of teeth on the sprockets/crankset: The ratio between the amount of teeth on the rear sprocket and crankset determines the gear ratio of the bike. Even though you have a gear hub ...
Maarten -Monica for president's user avatar
6 votes
Accepted

How to remove this Mavic spoke cover from the rear wheel?

I've not worked on this kind of wheel before, but it looks like the ball-end of the spoke is retained in a recess in the hub, and there's a big C clip stopping them from moving sideways (or up as in ...
Criggie's user avatar
  • 124k
6 votes

10-teeth/9-teeth Sprocket Efficiency Losses

Studies, yes there are. Here are a couple of VeloNews links that give some unbiased information. Technical FAQ - Calculating drivetrain friction losses This link is one of Lennard Zinn's installments ...
Ted Hohl's user avatar
  • 6,142
6 votes

Convert the number of teeth in a chain-based drive train to the number of teeth in a gates-based drive train

Some completely identical ratios: 11 teeth in front, 4 in back 22 teeth in front, 8 in back 33 teeth in front, 12 in back 44 teeth in front, 16 in back 55 teeth in front, 20 in back 66 teeth in front,...
juhist's user avatar
  • 18.7k
6 votes

How would i go about removing this gear cluster?

You need two chain whips. One to hold the freehub forward and one to unscrew the smallest sprocket, like the old Shimano UG system. If you only have one chainwhip, you can loosen the sprocket on the ...
Noise's user avatar
  • 13.9k
5 votes

50/34 vs 52/36 crankset for 11-32 cassette (shimano 105 5800FC)

50/34 with and 11/32 on the rear is going to be very spinny. For me - the range is too wide and the gaps between the gears too big. But - this depends on the kind of riding you will be doing. If you ...
OraNob's user avatar
  • 3,073
5 votes
Accepted

Bike broke, strange parts came out, and doesn't know where to find exact replacement

It is a derailleur pulley, and fairly worn out one at that. The easiest way to find a fitting replacement is to buy a set from an aftermarket manufacturer that comes with adapter shims for different ...
ojs's user avatar
  • 22k
5 votes
Accepted

Maillard sprocket: is really this rare?

If the Shimano freewheel didn't fit, it means that your bike uses French threading for the freewheel (which isn't surprising given that it has a Maillard freewheel; the other non-bmx standards are ...
Batman's user avatar
  • 46.2k
5 votes

Maillard sprocket: is really this rare?

It's also possible he has a Maillard Helicomatic hub (http://www.yellowjersey.org/helico.html) in which case it wouldn't be compatible with ANYTHING. You can usually find replacement freewheels and ...
Noah Sutherland's user avatar

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