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25 votes
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What explains 9 speed cassettes price differences?

In most cases with bicycle parts, more expensive means lighter. There can be exceptions, especially when you get to the super low end parts where cheaper can also mean cheaper construction. Since you ...
Fingel's user avatar
  • 414
23 votes

What exactly is the "clutch" doing on a Shimano M8100 rear derailleur?

I'll try to answer the question of exactly how the clutch works. In essence, the Shimano clutch design uses a one-way bearing that allows the cage to freely rotate clockwise, but adds friction if ...
MaplePanda's user avatar
  • 16.4k
21 votes
Accepted

How do I rebuild Shimano XTR hydraulic brake levers?

This answer must be prefaced with the obvious: brake-related work is high-consequence and could be genuinely injurious if performed incorrectly. Please exercise your own judgement regarding your ...
MaplePanda's user avatar
  • 16.4k
20 votes
Accepted

Difference between Road/Mountain Hollowtech II Bottom Brackets?

I'm going to limit this answer to Shimano Hollowtech II BBs as per the question. Some other brands do it a little differently. Mountain external bearing crank spindles are longer than road spindles, ...
Nathan Knutson's user avatar
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
17 votes

Get a tougher gear on Shimano GRX, 11-34T, 2x11

You cannot get a higher gear ratio by replacing the cassette. The 11 tooth sprocket is the smallest you can get on a compatible cassette. (Systems with 10 tooth sprockets exist but use a different ...
Argenti Apparatus's user avatar
17 votes

Can a counterfeit Shimano chain be used on an authentic Shimano drivetrain?

You can normally use chains from other legitimate vendors, be it SRAM or KMC or something else. You do not need to use Shimano™® chains only. But no-one can tell you whether your chain is of ...
Vladimir F Героям слава's user avatar
17 votes
Accepted

What exactly is the "clutch" doing on a Shimano M8100 rear derailleur?

I assume you're talking about Shimano's 12s XT rear derailleur. For disambiguation, 8100 could also refer to the 12s Ultegra groupset. However, the Ultegra group doesn't have a clutch, and I believe ...
Weiwen Ng's user avatar
  • 33.9k
16 votes
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Are Shimano 10 speeds going away?

They're trying to sell you stuff. More expensive stuff (have you looked at 11 speed consumable (chain+cassette) prices vs 10 speed?). I would not bother upgrading. As groups go to higher and higher ...
Batman's user avatar
  • 46.3k
15 votes

Are the Shimano derailleurs sold on Ali Express genuine or fake?

You pays your moneys and you takes your chance Answer Maybe genuine, but just as likely not. Essentially by buying discount, you're circumventing any quality and control process from the brand owner. ...
Criggie's user avatar
  • 128k
15 votes

How to mount clipless pedals on a tandem?

Tandem cranks are special. The pedal thread directions on each arm are oriented correctly to prevent loosening from precession, as on any other bike. You just need two sets of normal pedals. If ...
Nathan Knutson's user avatar
15 votes
Accepted

What are these red devices on Shimano Nexave v-brakes and how do they work?

The red part's purpose is to limit braking power by flexing when the rider pulls brake level too hard. They are claimed to improve safety by preventing accidentally locking the wheel, but in practice ...
ojs's user avatar
  • 22.2k
14 votes
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What's the difference between Shimano HG and SRAM XD free hubs?

The phrase missing here is 'Freehub body'. The freehub replaced the freewheel, mostly, which integrated the sprockets and the ratcheting mechanism. The freehub body is therefore the ratcheting ...
thelawnet's user avatar
  • 4,240
14 votes
Accepted

Why are trigger shifters so widely used, instead of the twisting grip shifters(revoshift)?

In the context of a high-end MTB designed to go quickly over difficult terrain, trigger shifters have the following advantages: They can be operated using only the thumb, without changing the grip, ...
Roman Odaisky's user avatar
14 votes
Accepted

Can a counterfeit Shimano chain be used on an authentic Shimano drivetrain?

The main problem is quality, in terms of dimensions and variance. If you think its an 11 speed chain but someone has just repackaged some 10 speed chain, then there will be issues. Likewise, if it ...
Criggie's user avatar
  • 128k
14 votes
Accepted

LBS won't Service Shimano Dual Control Lever

I've successfully destroyed several right-hand levers by attempting to fix them once they've started acting up. One was a broken basket in the shifter, and I forget the actual failure in the others. ...
Criggie's user avatar
  • 128k
13 votes
Accepted

Threading Shimano chain, over or under lug?

Shimano seems to keep a lot of their documentation online, you can find your specific manual there. For example, the site gives this picture for DEORE XT RD-M8000 derailleur. Essentially, the ...
Ross's user avatar
  • 373
13 votes

Rear cassette replace 11-30 with 11-32, or 11-28?

If the OP's bike has a short cage Shimano rear derailleur, then officially, the maximum cog size is 30t. Going down to 28t is definitely fine, but going over 30t is not technically OK. Shimano's ...
Weiwen Ng's user avatar
  • 33.9k
13 votes

Broken 105 shifter in fall, cause and is repair possible?

Sadly, all I have is bad news. It's not a quality control issue. It may not have felt like much of a crash but that lever was hit hard. There is no way to fix it. The plastic shell is part of the ...
David D's user avatar
  • 22.3k
13 votes
Accepted

Shifter cable ruptured near the inner end in ST-R7020 - usual defect?

The cable turns a double right angle in quite a small space. It's a very common failure on all the 11speed shifters from 9000/6800 onwards. The "solution" is to change the right hand cable ...
Noise's user avatar
  • 14.6k
13 votes

Did Shimano change the design of SPD cleats?

The SH71 was designed primarily to work with road versions of SPD pedals (7410 and 6500 models). SH51 and SH56 are the standard mountain bike SPD cleats and would work with all other SPD pedals. This ...
Noah Sutherland's user avatar
12 votes
Accepted

Shimano Steps ebike E010 and E012 errors: DIY fix possible?

The E012 error means that the torque sensor is misaligned. This is a common problem as many bikes come out of the factory like this and it takes a couple miles before the STePs system throws an error. ...
Chris Olin's user avatar
12 votes
Accepted

What exactly is Shimano's Shadow Plus technology for rear derailleurs?

TL;DNR A Shimano 'Shadow Plus' or SRAM Type 2 dérailleur (aka clutch dérailleur) means you can change the chain tension by flicking a lever. For completeness - back in the late 2000's, Shimano ...
mattnz's user avatar
  • 51.7k
12 votes
Accepted

Will an Shimano M8000 brake lever blade fit a M8100?

Ok this is exciting, I called around locally bikes owned bikes shops and asked if they had some scrap parts laying around. One of them had a Shimano SLX m7000 left brake assembly. I paid for the part ...
Jonathan S. Fisher's user avatar
12 votes
Accepted

Torque Wrench required for trainer cassette installation?

How important is torque wrench on this? It's not important at all. The cassette lockring just has to be tight enough to not come off as it's not doing anything other than keeping the cassette from ...
Andrew Henle's user avatar
  • 10.7k
12 votes

Upgrading gears from microshift to Shimano

Even cheap components should shift okay-ish, unless they are badly worn. Shifting problems are usually caused by any combination of: Bad adjustment: Incorrectly set cable tension or limit screws. ...
Michael's user avatar
  • 28.4k
11 votes

Change gear on a shimano Schwinn Ranger, not sure what Allen key size to use?

The allen is almost certainly metric. Both 2.5mm and 3mm are reasonably close to 7/64 inch. 3mm is a very common size on bikes. If you are going to do any work on a bike you need metric allen ...
Ross Millikan's user avatar
11 votes

105 Shimano 10 speed shifters - compatibility with 11 speed rear derailleur

This is to do with the different pull ratios employed by the different systems. In your case 10 vs 11 speed Shimano. http://blog.artscyclery.com/science-behind-the-magic/science-behind-the-magic-...
OraNob's user avatar
  • 3,073
11 votes

New roadbike. Poor cassette quality control?

There does not appear to be anything wrong with the cassette. Shimano helpfully put some nice clear pictures of individual sprockets on the product page for the CS-58000 cassette. https://bike....
Argenti Apparatus's user avatar
11 votes

105 R7000 front derailleur with 105 5800 crankset

Shimano lists the FD-R7000 front derailleur as compatible with the FC-5800 crankset in their products compatibility information, but the R7000 crankset wont be compatible with the old derailleur.
airace3's user avatar
  • 2,510

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