24 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
  • 15.5k
22 votes

My bike goes up one gear at a time, but down two: is this normal?

On or off road, but especially off road, it is desirable to be able to shift down more than one gear at a time to deal with abrupt changes in gradient and avoid being stuck in too a high a gear and ...
Argenti Apparatus's user avatar
22 votes

Why is there nearly no 1x road bikes?

It starts to appear on the high-end range, and is common for some very specific applications (time trial for example). A commonly heard critic of 1x transmissions is that there are not enough steps to ...
Renaud's user avatar
  • 19.1k
18 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
  • 31.1k
17 votes
Accepted

Why is there nearly no 1x road bikes?

I’m going to state things a bit differently from the other answers. On performance road bikes, you want to have small steps between at least the major gears and a wide range. Going 1x with even 12 ...
Weiwen Ng's user avatar
  • 31.1k
14 votes
Accepted

How to attach cable mounting points to a bicycle frame?

I'd go with full housing for both brake and gear cables and hold the cables on with cable clamps. There are many kinds of cable clamps to choose from. I prefer the type that have a screw clamp over ...
David D's user avatar
  • 21.1k
12 votes
Accepted

My bike goes up one gear at a time, but down two: is this normal?

Depending on the year of your Giant Escape 3, it either has Shimano EF40 or EF41 shifters. Both shifters have the same User Manual which has this information on downshifting: Assuming you are talking ...
Tim's user avatar
  • 236
12 votes

Shifting direction is different for front and rear shifters

The reason why shifting is arranged this way: Shifting to a larger chainring at the front gives a higher gear ratio, shifting to a larger sprocket at the rear gives a lower gear ratio. Shifting to ...
Argenti Apparatus's user avatar
12 votes
Accepted

Can't switch to biggest sprocket after the upgrade

Have you set the low limit (L) screw correctly? Sounds like it is restricting the RD on its way to the innermost cog while tension and indexing are just fine. Here is a good tutorial: https://www....
DoNuT's user avatar
  • 4,226
10 votes
Accepted

How to lower gearing on Tiagra 4700

Shimano's most recent compatibility chart is available here. Note that these are official compatibility ratings. It is fine to exceed official specs by a bit. At the rear, you can get a 10s Tiagra ...
Weiwen Ng's user avatar
  • 31.1k
10 votes
Accepted

Derailleur can't shift to 51-T sprocket. Deore CS-M5100 + RD-M5100

Turns out this derailleur needs a 'standard mount' derailleur pad/hanger. I have currently a direct mount. The Canyon representative thought the SRAM hanger was for 10 speed. To me, it is now clear ...
Ludo's user avatar
  • 181
10 votes

Shifting direction is different for front and rear shifters

This is the way most (99.999%) of bikes work. If you really want to change it - I advise against such a move, the only option would be hunt out a (fortunately) now defunct "Rapid Rise" or &...
mattnz's user avatar
  • 49.8k
10 votes
Accepted

Shifter cable broke in the shifter and now the end is stuck in the shifter

Take off the little plastic cover on the bottom of your 5800 shifter. The line of its edge is visible in your second photo (1 or 2 screws). You will then have good access to remove the head. You can ...
Noise's user avatar
  • 13.9k
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

Rear derailleur cage bigger than cassette necessity

An RD-5701 rear derailleur should work just fine as a replacement for an RD-6600. I've used an RD-5701 with an 11/28 cassette for the last 6-7 months with no issues, including swapping my crankset ...
Andrew Henle's user avatar
  • 10.6k
9 votes

Derailleur mounting position

Welding is probably a bad idea - for several reasons. Heat changes things - no doubt you have welding skills, but you'll know that relatively thin metals warp and bend and change their temper. The ...
Criggie's user avatar
  • 124k
9 votes

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

On top of Weiwen Ng answer, the clutch also has another benefit. Large cassettes have a lot of inertia, when you stop pedaling (at high speeds), it keeps rotating. If the derailleur doesn't have a ...
Renaud's user avatar
  • 19.1k
8 votes

Parking a 3-speed internal hub in 2nd gear permanently

In the 45 minutes since I posted this question, I have developed an elegant workaround using a simple device: I stuck a pebble in the bellcrank. Most folks here probably won't be surprised by this ...
hairboat's user avatar
  • 562
8 votes
Accepted

Cannot shift into lowest gear

Either the L screw which limits how far the derailleur can move towards the wheel is too far in or the cable tension is too low. Try to increase the cable tension first by turning the barrel adjuster ...
Michael's user avatar
  • 26.8k
8 votes

Down shift quickly

To answer this part of the question: Are there any hacks or types of shifters that let you quickly shift down across the gear range Grip shifters should allow one to click through the whole range ...
Grigory Rechistov's user avatar
8 votes
Accepted

Shimano 105 front derailleur has some “extra shift” after shifting to small cog

Ben, congratulations on your new bike! Yes the behavior is normal. The large cog should have a similar setting, i.e. if you don't shift all the way to the small ring, but just click gently, it should ...
NoirDesir's user avatar
  • 198
8 votes
Accepted

11 speed shifter levers on my 10 speed drivetrain

No, won’t work. Edit: To be more precise: The indexing will be off. The 11 speed road shifters pull more cable for each gear step (each “click”). So you’ll have shifted through the whole 10 speed ...
Michael's user avatar
  • 26.8k
8 votes

45 day old SRAM rear derailleurs jumps gears

When the shifting skips over a cog on the cassette gears, this is because the derailleur hanger (or less often, the derailleur cage) is misaligned. That is, the small sacrificial tab of aluminium ...
Swifty's user avatar
  • 12.8k
8 votes
Accepted

I can operate any stick shift without the owner's manual; can I operate any front derailleur with no manual?

Many left road shifters, including almost all recent higher end ones, have four positions, i.e. there's a trim stop for both the small and large ring. There is not, nor in practical terms could there ...
Nathan Knutson's user avatar
8 votes
Accepted

Loud clunk moving to smallest sprocket

The clunk you demonstrate in your video is normal. Some frames, deep dish wheels, or especially a full disc wheel, can amplify the clunking sound of shifts to smaller cogs on a rear cassette under ...
Ted Hohl's user avatar
  • 6,162
8 votes

Why is there nearly no 1x road bikes?

Unlike some innovations, electronic shifting seemed to take off faster on road bikes. That can be set up to allow the simplicity of sequential shifting that's inherent to 1x,but with more ratios. MTBs ...
Chris H's user avatar
  • 58.4k
8 votes

Why is there nearly no 1x road bikes?

The motivation for 1x came from frame designers, not riders. MTB soft tail frames are extremely crowded around the bottom bracket. Suspension pivots need to strong and close to the crank. Removing the ...
mattnz's user avatar
  • 49.8k
7 votes
Accepted

No trim and can't shift into small chainring

Sounds like you have a bit too much cable tension in your new configuration. Usually cable tension is tuned with the barrel adjuster you mentioned, but if you cannot get the tension low enough with ...
Wsal's user avatar
  • 601
7 votes

Why does my vintage Shimano rear derailleur come with brake style cable housing?

I assume that you have a friction shifter? A friction shifter is one that does not click into an indexed position. You just adjust it until the derailleur is lined up where you want it. Assuming this ...
Ben Stokes's user avatar
7 votes

How to run full length cable housing to front mech on a frame without cable stops?

It looks to me like you may be able to use a clamp-on cable stop. All you need is a round steel-alloy frame tube that is strong enough to accept a clamp. If the clamp is located close to the point ...
ichabod's user avatar
  • 501

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