Questions tagged [shifting]

Questions relating to the act or mechanisms involved with moving the chain from one gear to another.

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37 votes
13 answers
24k views

Is there such thing as an automatic transmission for bikes?

Has anyone ever designed or manufactured an automatic transmission (or automatic shifter?) for cycling? I imagine such a device would automatically change the gearing to allow the rider to maintain ...
Ken's user avatar
  • 1,311
24 votes
8 answers
8k views

Why is there nearly no 1x road bikes?

During last ~10 years, nearly all high-end mountain bikes became 1x. Front derailleur seems to be gone. In road bike world this has not happened. Why so? MTB gear range is typically larger than road ...
Konstantin Shemyak's user avatar
22 votes
12 answers
15k views

Is standing up and pedaling on multi-gear bicycles a bad idea

After reading While pedaling standing up, bike crank gives in as if shifting, what is causing this? , I was thinking "one should probably not be standing up to pedal under normal circumstances". Is ...
MrDaniel's user avatar
  • 768
19 votes
3 answers
9k views

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

My new Shimano 12s XT 8100 rear derailleur has the switch with on and off positions. From that I found on the web, it is a "clutch" and I must turn it off when removing the wheel. I can ...
nightrider's user avatar
  • 7,749
14 votes
6 answers
6k views

Mechanic says not to use top three/bottom two gears or the chain will throw

I just bought a BTwin Fit 5, all stock, fresh from the distributor, Decathlon. Took it for light pacing at the store and things seemed OK. About 100 metres out the door, I shift up to the top end of ...
Esoteric Screen Name's user avatar
13 votes
12 answers
107k views

While pedaling standing up, bike crank gives in as if shifting, what is causing this?

While standing up and pedaling, the cranks give in as if shifting. It seams like I am shifting down, but my hands are off the shifter, almost like the chain is skipping a link. I took it to a bike ...
Mark's user avatar
  • 131
11 votes
5 answers
11k views

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

Just over a year ago I bought a new bike (a Giant Escape 3) with a trigger gear system - my previous one had a grip-twist to change gears. After riding and experimenting for a while, I was able to ...
Bob Tway's user avatar
  • 691
11 votes
1 answer
4k views

How to attach cable mounting points to a bicycle frame?

I have a frame-building project that is near completion: An old 90ies steel MTB frame was cut, and converted into a frame for a cargo bike. In my enthusiasm, I have overlooked one detail: The ...
Donat Holzer's user avatar
11 votes
7 answers
61k views

Rear derailleur shifting poorly, skipping gears

I've got a Shimano Sora on a 8-gear cassette, and have odd behavior and skipping, shifting under stress. This started with a trip to the mechanic for a tune up which replaced the chain. I had some ...
moxen's user avatar
  • 113
9 votes
9 answers
61k views

Chain slipping on newish bike

I've looked at most of the answers for related questions and they all speak about replacing parts that are old. I just bought a new bike from a friend who rode the bike for about a month before ...
going's user avatar
  • 1,509
9 votes
2 answers
5k views

Cleaning Cable Housing?

I commute about 3600 miles a year and I am able to keep my gears adjusted pretty well. I do find that I get a lot of grime from rainy, muddy conditions, and I think I might be replacing my shift ...
memnoch_proxy's user avatar
9 votes
3 answers
4k views

difficulty in shifting to lower gear on shimano (6 speed rear gear)

I am new to using a bicycle with multiple speeds. I got this new bicycle 4 days back with Shimano 6 speed rear gears. I don't know much else about the components. There is no issue when I move to ...
Amit's user avatar
  • 191
8 votes
1 answer
3k views

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

ISSUE: When attempting to shift to the largest cassette sprocket, the side of the derailleur cage contacts the 51t sprocket, so the chain is not able to go up the gear. WHAT I DID: My drivetrain was ...
Ludo's user avatar
  • 181
7 votes
2 answers
6k views

How should I select front and rear gears?

Just bought a Falcon Interceptor bike with Shimano gears - whatever that means. I've had bikes in the past but only those with one set of gears for the rear wheel. What's the need for front and rear ...
Andy's user avatar
  • 71
7 votes
1 answer
684 views

How exactly does cross-chaining accelerate wear?

I've heard all over that cross-chaining "wears your drivetrain out faster". I must admit I'm not 100% convinced that this is true, because I can't see a scientific basis for it. Could I get an ...
BSO rider's user avatar
  • 5,710
6 votes
3 answers
1k views

Shifting direction is different for front and rear shifters

I have been riding singlespeed and 1x setups for decades. The last time I had a front derailleur was over 30 years ago, and the shifter was on the downtube then, and I don’t have any memory of how it ...
BetterSense's user avatar
  • 3,356
6 votes
7 answers
66k views

Front derailleur is hard to shift into the big ring. Where to start?

I have a shifting problem on a bike that has a crank with a triple set of chainrings. The bike is a tandem. I have to put a great deal of effort to get it to shift into the big ring. Where should I ...
CLJ's user avatar
  • 261
6 votes
1 answer
473 views

Can't switch to biggest sprocket after the upgrade

I have upgraded some components of my old MTB's drivetrain as it had a Deore crankset and Alivio rear derailleur but 7 speed cassette, shifters and chain for a long long time. Now they are all 9 speed ...
Ender's user avatar
  • 1,950
6 votes
2 answers
1k views

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

I got a NOS Shimano RD-6400 rear derailler and it came with cable housing that I usually see on brake cable housing with that thick wire coil inside. I always thought those aren't suitable for ...
user430's user avatar
  • 733
6 votes
3 answers
863 views

How can I get a lazy rear derailleur to move all the way into smallest cog position?

I have a Microshift Marvo XE rear mech, 9 speed, on a little recumbent I made. It's been a decent derailleur, but recently, when in the smallest cog (11-32 cassette back there) it does the "clunk-...
user avatar
6 votes
2 answers
2k views

Rear derailleur cage bigger than cassette necessity

I use a Shimano Ultegra 6600 rear derailleur with short cage in a 11/28 cassette. The derailleur is at the end of its useful life and would like to exchange for a cheaper one, since I intend to ...
Confundir's user avatar
  • 307
6 votes
1 answer
775 views

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

So The end of my rear derailleur shifter cable is stuck in the shifter. Is it even possible to get out? See the picture below. Shifting up and down doesn't really do anything to its position. Edit: I ...
Bijlenman's user avatar
6 votes
2 answers
485 views

Shifting issues... Derailleur hanger or cable?

I have a MTB which I can't adjust its shifting properly. I replaced the rear derailleur and shifting cable with new ones but it still doesn't shift properly. I suspect the problem might be derailleur ...
Ender's user avatar
  • 1,950
6 votes
1 answer
1k views

Loud clunk moving to smallest sprocket

When I shift gears to the smallest sprocket it makes a very loud clunk sound. There's also a lot of movement in the chain, like a bounce. I've taken a video demonstrating this Video of clunk I'm ...
nblackburn's user avatar
6 votes
3 answers
36k views

Bike won't shift at all

I have old old 90's Cannondale that has been sitting in a spare bedroom for the last three years just collecting dust (has not been ridden in those three years). I bought a bike trainer over the ...
RustyStatistician's user avatar
6 votes
1 answer
27k views

Misadjusted B-screw: symptoms?

What are the typical symptoms of incorrectly adjusted B-screw in the rear derailleur? How does it manifest itself when shifting? Obviously, if the cage pulley interferes with the cog, the problem is ...
AnT stands with Russia's user avatar
6 votes
3 answers
301 views

Are there any fully automatic electronic shifters?

Inspired by Are there any electronic shifters that decide front/back for you? and a near duplicate of Is there such thing as an automatic transmission for bikes? the difference being that here I'm ...
Vorac's user avatar
  • 13.7k
6 votes
3 answers
11k views

Cannot shift to lowest gear - chain too short?

I’m in the process of switching from an 11-25 to 11-32 rear cassette. The upgrade has involved replacing the cassette, rear derailleur (short to medium cage) and fitting a new chain. I can cleanly ...
lewiz's user avatar
  • 61
6 votes
4 answers
42k views

Chain shifting when back pedaling

On my bike I found that when I backpedal, if the chain isnt perfectly straight, it is prone to shift to a more central gear. E.g would be if on the small chainring and the largest cog, backpedaling ...
Karthik T's user avatar
  • 541
6 votes
1 answer
510 views

Is it acceptable to have some noise on largest sprockets?

There is some chain noise on the two largest sprockets on my friend's road bike. It's not a skipping noise and not on a cross-chaining gear. Do you think it is ok to have noise on these sprockets or ...
Ender's user avatar
  • 1,950
6 votes
1 answer
963 views

Nexus hub keeps getting misaligned

I have a nexus 8-speed internal hub on a Civia Kingfield bike. It keeps getting misaligned -- the dots on the bottom don't line up. In the past I have successfully adjusted it using the barrel ...
Pedro's user avatar
  • 83
6 votes
1 answer
7k views

How to prevent shifting issues due to derailleur or cables freezing in cold weather

It's been fluctating in temperature between 0F and 20F in my area. I've been riding my 1x9 geared mountain bike to and from work. However, due to the cold weather, I'm having issues shifting. It ...
Benzo's user avatar
  • 18.2k
6 votes
1 answer
6k views

Downtube shifters won't stay in low gear on rear derailleur

I've finished a bike restoration today and it's my first time using downtube shifters. They work and will span the full range of gears but won't stay in the big cog on the back for long, the shifter ...
Harvey Brackenbury's user avatar
6 votes
2 answers
5k views

Chain length differences between 1X and multi-chainring setups

When determining correct chain size, one common technique is to install the chain (without passing it through any derailleur) onto the largest front and rear sprockets. Then, determine the shortest ...
BetterSense's user avatar
  • 3,356
6 votes
1 answer
609 views

Tandem drivetrain--right side front drive

From what I am reading, there are 3 attested tandem drivetrains: 1) crossover drive, with timing chain on the left, and main crankset and drive chain on the rear right. This seems to be most common. ...
BetterSense's user avatar
  • 3,356
5 votes
3 answers
636 views

How to remove the pin on the lower end of the shift cable, to replace the derailleur

I need to replace the rear Shimano XT 7100 derailleur what broke in two at the base. It is attached by the single screw only but there is a metal pin fitted over the tip of the gear shifting cable. ...
nightrider's user avatar
  • 7,749
5 votes
3 answers
573 views

Shifting can't keep up with my acceleration

I noticed that when I really give it hell after stopping or riding slow (I do that all the time on commute), I have to shift two gears at a time in the lower gears, to keep up with my acceleration. I ...
Sam's user avatar
  • 163
5 votes
3 answers
108k views

Cannot shift into lowest gear

I've been fiddling with my rear derailleur trying to fine tune it, because I just replaced my entire drivetrain (same components, but new) The problem that I'm facing now is that I can't seem to ...
zython's user avatar
  • 381
5 votes
1 answer
4k views

How to lower gearing on Tiagra 4700

I have a bike with Tiagra 4700 hydraulic groupset and I want to lower the gearing from the present minimum 34/28. The one thing I'd not like to replace is the shifters: These ST-RS405, while truly ...
Konstantin Shemyak's user avatar
5 votes
2 answers
1k views

Shimano Cassette Size Change

I recently purchased a wahoo kickr core and I picked up a Shimano Tiagra CS-HG500 11-32t cassette to put on it. Currently I am running an CS-HG500 11-34t cassette and GRX400 setup. Shimano's website ...
Jason R Miller's user avatar
5 votes
4 answers
706 views

Chain drops when shifting up a gear at the front?

I've just gotten a new bike and run into a problem. When shifting from a smaller cog to a bigger one in the front gears, the chain consistently drops. The problem happens regardless of whether I'm on ...
SRJBike's user avatar
  • 51
5 votes
4 answers
597 views

GRX 2x11 - what causes the chain to bounce significantly when shifting the cassette into a higher gear (smaller sprocket)?

I recently set up a new gravel bike with all new components, including a 2x11 GRX DI2 drivetrain. 31/48 and 11-36t. It has ridden under 600 miles and only seen rain once. It is accident free and has ...
jonatans's user avatar
5 votes
3 answers
1k views

When shifting both left and right shifters, what's the preferred sequence?

My technique has always been "easier, then harder". When switching to the big chain ring, I first downshift at least twice on the right (easier) and then upshift on the left (harder). When switching ...
Ian Whiting's user avatar
5 votes
2 answers
5k views

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

Is there a difference of spacing between cogs on a 7 speed cassette vs a 8 speed cassette? When I got a new wheel (upgrade from freewheel hub), I tried to get a 7 speed cassette (SRAM) for it, but ...
BPugh's user avatar
  • 2,371
5 votes
2 answers
779 views

Which cables and housing do I need?

I am going to build my own bike. I purchased the 105 5800 groupset the other day and was examining the different components. The shifters came with some cables and cable housing. I have attached a ...
Mr B's user avatar
  • 431
5 votes
1 answer
5k views

My bike's gears won't shift properly or at all

Firstly, sorry if this has been asked before but I don't know much about bikes. I bought my bike from big w (fairly cheap beginners bike, but I am happy with it). It has two shifters, one on the left (...
user3788874's user avatar
5 votes
5 answers
4k views

Gears shift perfectly when suspended on rack, but not on the ground?

So I had recently solved some issues I was having thanks to the community. I re-tuned my bike on a suspended mount and everytning looks great. On the ground, all of the gears work smoothly except for ...
BrettH's user avatar
  • 81
5 votes
1 answer
4k views

replacing shifter cable housing?

My rear cable housing got torn apart while I was tunning gears as you can see in the picture. I'm quite new to cycling so i'm not sure if i should replace the whole cable or just the part of the ...
samsamara's user avatar
  • 247
5 votes
1 answer
680 views

Shimano Deore front derailleur return spring broken?

For a couple of days now, I am no longer possible to shift to the smallest chainring of my bicycle. There is simply no response at all (no resistance, no click-sound, nothing happens. The indicator at ...
user69238's user avatar
5 votes
1 answer
520 views

Nexus IGH reluctant to shift after applying load

I ride a belt drive bike with a Shimano Nexus SG-C6001-8D IGH. I'm aware of the normal cable adjustment procedure (aligning yellow marks on the hub), I've done this. When I ride normally, shifting is ...
user4520's user avatar
  • 563

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