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19 votes
Accepted

Will a 7-speed chain work on a 2x10 speed drivetrain?

will this new 7-speed chain work on a 10-speed cassette? No. That's based on my experience with a nine-speed chain shipped by mistake on a 10-speed drive train. That didn't work well - shifting was ...
Andrew Henle's user avatar
  • 10.7k
9 votes
Accepted

Is there a difference of spacing between cogs on a 7 speed cassette vs a 8 speed cassette?

Yes, there is. Shimano/SRAM & compatible seven speed is 5mm cog-to-cog, and eight is 4.8mm. Generally what you're trying to do here can't be made to work very well. There are some tricks that ...
Nathan Knutson's user avatar
9 votes

Will a 7-speed chain work on a 2x10 speed drivetrain?

Additionally, all derailleur bike chain is 1/2" pitch, with a nominal 3/32" width. The difference in width is much more subtle - https://bicycles.stackexchange.com/a/17065 shows that the ...
Criggie's user avatar
  • 127k
7 votes

Can I use BSA bottom bracket's plastic spacer as a cassette spacer?

Yes, it will work to use the plastic spacers. If they are not pressed against a flat surface however, they can warp and potentially crack. The metal spacers are better. You can also use individual ...
Noise's user avatar
  • 14.4k
6 votes

How do I convert a 24-speed bike to a seven speed?

I cannot imagine a good reason to do this. Your drivetrain will not be more robust. Doing this will be fairly expensive. You'll need a new cassette (to go from 8 gears to 7) and new a new rear shifter ...
Adam Rice's user avatar
  • 30.1k
6 votes

Is not changing/shifting gears much bad when riding around?

There's an old joke. Man says to his doctor "It hurts when I do this." Doctor says "Don't do that." If you've got a multi-speed bike and the shifting doesn't work well, the solution is to fix the ...
Adam Rice's user avatar
  • 30.1k
5 votes

Upgrading my chainring

Your frame is the limiting factor on your chainring size. Check if the manufacturer has a suggested maximum chainring size, via their website or in your manual. Otherwise, print out the Wolf Tooth ...
Criggie's user avatar
  • 127k
4 votes

What is a good replacement for my MF-Z012 6 speed wind on cassette?

1984 – Shimano introduced Dura-Ace 7400 series with Shimano Index System (SIS) the first successful indexed-shifting system in cycling history. It was a 6-speed (7 and 8-speed later) system with ...
Criggie's user avatar
  • 127k
4 votes
Accepted

Replacement shifter for Shimano exage 7-speed - modern shifter compatible?

For the shifter to match, you need to match the number of speeds, cassette width and shifter actuation ratio. For Shimano everything under 10 speeds (except 8-speed Dura Ace which most people don't ...
ojs's user avatar
  • 22.2k
4 votes

Riding experience of 21-speed vs. a 7-speed?

Do you use the front derailleur? It seems many people in reasonably flat areas do not. If not, you are riding a 7 speed. Take a ride and notice what gears you are using, particularly on the ...
Ross Millikan's user avatar
4 votes
Accepted

How do I convert a 24-speed bike to a seven speed?

If your bike is 3x8 you could convert it to 1x8 but you will loose a lot of gear range for a very dubious profit. If you are careful when shifting, you should not suffer too much from the front ...
Vladimir F Героям слава's user avatar
4 votes
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Replacement chain for old Shimano 3x7 STX

Shimano's STX groupset utilizes hyperdrive and Dual SIS technology, so the Shimano chain, CN-HG40 would be an excellent choice for the 7 speed drivetrain you have. Shimano chains in speed classes 7 ...
Jeff's user avatar
  • 10.8k
4 votes

Upgrading my chainring

The largest chainring you can fit on the bike is determined by the clearance of the chainrings teeth in relation to the chainstay (that is the lower tube coming from the bottom bracket shell back to ...
Jeff's user avatar
  • 10.8k
3 votes
Accepted

Will a 3x10 or 3x9 front derailleur work on a 6/7 speed chain?

Generally yes, the front mech can work acceptably with other sizes of chain. Since you will have a thicker chain than expected, the front derailleur cage may need to be widened a little to reduce ...
Criggie's user avatar
  • 127k
3 votes

Is not changing/shifting gears much bad when riding around?

If you are a casual cyclist on flat terrain, without a lot of stops you can get away with not changing gear very much. Learning how to effectively change gear at stops and as the grained changes can ...
Argenti Apparatus's user avatar
3 votes

Best option to upgrade 7-speed bike to higher gears

Adding two or four teeth to the largest chainring will not improve you high gear very much. Right now your highest ratio is 48/14=3.429. Going to 52 will get you to 52/14=3.714, which is not much of ...
Ross Millikan's user avatar
3 votes

replacing stolen rear wheel. compatability question

The 7-speed cassette standard has been functionally discontinued for new wheels. Most new wheels come in 8-10 or 8-11 speed compatibility. Since the 7-speed cassette bodies were shorter, you can ...
CardMechanic's user avatar
  • 2,795
3 votes
Accepted

Should I get 7 or 21 speeds for city commute?

7 and 21 gears are functionally the same at the back. The difference is whether you have one or three chainrings on the front. For simplicity, a 1x7 would have less stuff and therefore be more ...
Criggie's user avatar
  • 127k
3 votes

Shimano 7-speed chain - upgrading for more durability

(I will keep editing this self-answer with my experiences since I posted the question. Due to the platform's policy, this isn't meant as product recommendation, I just want to share my process in ...
DoNuT's user avatar
  • 4,496
3 votes

Upgrading my chainring

A couple of years ago I asked exactly this question in Can I (easily) change this chainring? And the answer turned out to be "yes". It was both cheap and easy. I bought a new 104 BCD ...
John Rennie's user avatar
  • 1,039
2 votes

Replacement cassette for Schwinn Jaguar 7-speed?

Clearly this post is in regards to a newer Schwinn rather than the originals from the '50s and '60s, as the latter were all equipped with Sturmey Archer internal-gear hubs. Searching for "Jaguar" on ...
Fing Lixon's user avatar
2 votes

Best option to upgrade 7-speed bike to higher gears

The easiest option is just stick to your original plan of changing ratios in the rear. There there should be Shimano compatible 11-28 or 12-28 freewheels out there. I found one made by DNP after a ...
Argenti Apparatus's user avatar
2 votes
Accepted

Run a Shimano STX derailleur with 8 speed cassette or bigger?

Basically all the <=9 speed Shimano rear derailleurs are compatible with the <=9 speed Shimano shifters (excluding some old Dura-ace and a few other weird exceptions). So, you need to match: 1) ...
Batman's user avatar
  • 46.3k
2 votes

Converting friction shifters to SIS or STI shifters

Since you're going to a lot of work, moving to 8 speed (or 9 or 10) sets you up for the most flexibility. The main reason is that you need a new rear hub with a cassette-freehub. There's no good way ...
Criggie's user avatar
  • 127k
2 votes
Accepted

How to tell which freehub body is a compatible replacement for the one on an old Shimano FH-HG50 rear hub?

Most of the time, the problems you mention can be fixed by removing the freehub completely, pulling the seal in back (note orientation) and running some combination of degreaser/solvent/oil/air/etc ...
Nathan Knutson's user avatar
2 votes
Accepted

Lowering gears and changing crank length on 1994 Bridgestone MB-5

There are some differences in chainring spacing between crank speed generations. But even within a speed generation, the spacing numbers are not truly standardized. That's one reason for the ambiguity ...
Nathan Knutson's user avatar
2 votes

Riding experience of 21-speed vs. a 7-speed?

A 7 speed bike will have a very limited range of gear ratios compared to a 3x7 (triple front rings, seven sprockets in back, AKA 21 speed) bike. What your bike shop guy was saying is that the Treadway ...
Argenti Apparatus's user avatar
2 votes

Repairing the rear drivetrain of an old road bike (issues with 7 speed)

Adam's answer is not quite right. This table is from one of his links: You can use a 7sp cassette (and wheel) to replace any 7sp freewheel. The biggest problem you are likely to face is finding or ...
Noise's user avatar
  • 14.4k
2 votes

Repairing the rear drivetrain of an old road bike (issues with 7 speed)

If you don't have indexed shifting, it doesn't matter. You may need to adjust your derailleur's limit screws. If you have indexed shifting, you cannot use a cassette or freewheel with a different ...
Adam Rice's user avatar
  • 30.1k
2 votes

Can I put a Shimano 1x12 group set on my benotto xc 4000

If your bike has a 7 speed freewheel then no you can’t put a 1x12 system on the bike without changing the rear wheel and even then maybe no. At a general level it depends on whether your rear wheel ...
Warren Burton's user avatar

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