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Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

2
votes
2answers
44 views

Shimano STI does not shift up/to lower cogs

Typ: Shimano RS505 2x11 hydraulic Problem: Up shifting is possible to the 5th or 6th cog, after this the STI does not give the click feedback and the derailleur does not move to the next smaller cog. ...
2
votes
1answer
61 views

Shimano Metrea ST-U5060-R compatibility

So I'm trying to find out if Shimano Metrea ST-U5060-R would be compatible with any Shimano 11 rear derailleur? Also, would it also be compatible with the T4700 Tiagra derailleur since it seems to be ...
1
vote
2answers
61 views

How to determine which cassettes I can use with my derailleur?

I am trying to understand which cassettes I can install on my bike. I've understood that the length of the derailleur also determines which cassettes will fit. In my case I have a triple (see picture ...
1
vote
1answer
215 views

What is the top sprocket?

I am reading the Shimano specs and I cannot figure out what is the "top sprocket". An example: https://bike.shimano.com/en-EU/product/component/sora-r3000/RD-R3000-SS.html "Low sprocket" (I couldn' ...
2
votes
1answer
108 views

Can a universal derailleur hanger be a suitable long term solution?

I've recently snapped my derailleur hanger for an old Apollo Raceline Peleton road bike. Have had no luck sourcing a replacement that fits, and neither have local bike shop. Has anyone been in a ...
3
votes
1answer
91 views

Will Shimano Di2 synchro shift work with an XT (Mountain) rear derailleur with an Ultegra (Road) front derailleur on the same bike?

Basically, can I mix a mountain Di2 rear derailleur (specifically, the RD-M8050-GS) and with a road Di2 front derailleur (specifically, the FD-R8050)? Will firmware updates and syncro shift still both ...
2
votes
2answers
1k views

10 speed rear derailleur only shifting 7 gears…losing my mind

OK, so I have a rough and ready road bike (Planet X London Road) that is not shifting right.... It is running: Shimano Tiagra 4600 Shifters (3 x 10) but running it a 1x10 with one front chainring ...
5
votes
2answers
1k views

What does this barrel adjuster do on the rear derailleur (SRAM Apex 1)?

On this SRAM Apex 1 derailleur, what does this barrel adjuster do? What happens if I turn it clockwise/anti-clockwise?
6
votes
3answers
279 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 ...
-1
votes
1answer
117 views

I can't shift gears

My friend gave me his bike because it was too small for him, I was new to biking so I didn't notice till now that T can't switch gears. My front derailleur is on middle gear out of 3 and the rear on ...
0
votes
1answer
75 views

Shifter/brake-lever compatibility with front and rear derailleurs

I am currently converting my bike from flat bars to drop bars for a long touring cycle. I used to have Shimano SL310 shifters (8x3), but have now bought Shimano Sora ST-3300 (8x3) to mount on the drop ...
2
votes
1answer
202 views

Very stiff front derailleur

My girlfriend has been having problems with her front shifter/derailleur since she got her bike. For some reason, moving the chain from the middle ring to the big ring at the front, is very stiff. ...
1
vote
2answers
94 views

Front derailleur cable suddenly very slack (no shifting), not sure what's caused it

I last rode the bike on Sunday. Throughout the ride I noticed the front shifter (grip friction shift, Shimano) was feeling "looser" than normal (hard to describe, it didn't feel "right" and seemed to ...
4
votes
5answers
679 views

Remove old non-indexed levers for gear changing to make “fixed” speed bike?

I recently got an old bicycle for the sole purpose of using it on a trainer. It has old non-indexed levers for gear changing and they don't seem to work OK. The front one slips into lower after a ...
2
votes
1answer
91 views

Derailleur out of alignment after cable snapped

The front derailleur cable snapped on a friend's bike, she shifted it with her hand to a rideable position, and rode for a few weeks. She asked me for help replacing the cable, though when I replaced ...
0
votes
2answers
85 views

Would a IGH drive train last longer than a derailleur drive train?

Would a single sprocket + 8 speed chain + single chain wheel used in combination with a IGH last longer than a 10 speed cassette + 10 speed chain + 3x chain wheels? Image I have 2 bicycles. Bike 1 ...
2
votes
1answer
71 views

How do I figure out what crankset replacement will fit my derailleur?

I have a bike with a Shimano FC-M560 crankset in the front which I want to replace. I naively bought a Shimano FC-TY301 crankset, thinking that there's norms and that 3-speed cranksets are more or ...
4
votes
2answers
1k views

Test drive of bike derailed chain easily … bad sign or nothing?

I tested a bike at a bike shop today. I rode it about 30 feet / 10 meters, turned left up a very shallow hill, hit the left (forward) dérailleur and the chain came off (went past innermost front ...
0
votes
2answers
91 views

Help replacing front derailleur

Evening, total newb question maybe but it’s driving me mad. I have a Carrera Vulcan 2015 model which I bought second hand to aid my physiotherapy. From what I can work out by the spec sheet the ...
2
votes
2answers
364 views

Will 2 x 10 speed front derailleur work with 11 speed set up?

Would an existing 2x10 front mech work with a new 11 speed rear set up? Using all Shimano SLX with 11 speed shifter, rear mech and chain. Front chain rings are 2 x SLX 38/28.
13
votes
2answers
837 views

Bike chain slips in a strange way

I bought a new bike about a month ago. And it made a strange sound from the first ride , I thought the sound was because it was new and will disappear with time but it didn't. The sound is like a ...
0
votes
1answer
115 views

One extra position on front derailleur besides trim

After I changed shift cables, I have 4 positions on my front derailleur. WTF? I have a double chainring. I have a trim position as well, but after shifting to the big chainring, I can still move the ...
1
vote
1answer
179 views

Front chainring spacing difference between Shimano and Campagnolo?

I want to upgrade my mid 80s road bike from a 50 tooth to a 53. But the BCD of the big triple chainring is some rare standard that it costs less to buy a whole (used) crank instead. And of course this ...
0
votes
1answer
32 views

Adjustment necessary for stationary trainer

I am looking at purchasing a stationary trainer that will be shared with my wife and would prefer to do a wheel off trainer. Both of our bikes have a 11-28T cassette. So, theoretically, if the ...
1
vote
0answers
75 views

RD-TZ40 ME Replacement

I've damaged the rear derailleur on my bike, and it needs to be replaced. I don't really have an LBS. I've looked around online, but I can't seem to find a correct replacement. I should clarify that ...
0
votes
3answers
522 views

OK to ride with a slightly bent mech hanger?

My rear derailleur took a knock from a fall, and the entire shifting range moved inwards by about one sprocket width. I suspect, but am not sure, that the mech hanger got slightly bent (could be ...
0
votes
2answers
121 views

Is this regular chain/pulley noise or is there someting I should check/adjust?

Extra images I'm 99% certain the noise is coming off one or both of the derailleur pulleys, but not sure if it's to be expected or if it's irregular and something that should be fixed? Edit Just ...
1
vote
1answer
375 views

Sora STI Shifters with Deore

I'm building a touring bike and was interesting in using STI shifters, just wondering if this setup will work. Shimano Sora 3500 STI Triple 3x9 Speed Road Lever Set with Shimano Deore M590 Top Swing ...
2
votes
1answer
170 views

Installing modern Deraileurs in an Old type mountain bike Frame

Found my old mountainbike(steelframe) and i saw that its Rear Deraileur was worn out, was wondering would i be able to install a modern deraileur on a bike frame like this? I'd also like to ask if ...
23
votes
11answers
5k views

Are there real-life alternatives to the chain+derailleur combo?

I was reading an article about the CeramicSpeed’s Driven concept and, while not interested in the efficiency part, the chainless system reminded me of something I was wondering for some time: are ...
1
vote
3answers
123 views

Rear derailleur moves to much for each click - tried everything

Two years ago I build a bike (flat bar) with SRAM 1x11. Around a month ago the rear-derailleur broke (guide pulley broke). I bought a new rear derailleur: Shimano 105 RD-5800-GS. After installation ...
2
votes
1answer
800 views

Shimano front derailleur - tensioning, can't move shifter

I am trying to fix the front shifting on a bike (not my own, family member). The original reported problems were inability to shift into 3 (largest), combined with a tendency for the chain to come off ...
3
votes
1answer
95 views

Electric road bike - Compatibility questions

I am building an ebike on a road frame. I am using a Bafang G310 rear hub motor & 8 Speed Shimano cassette. I plan to use a long MTB rear 8 spd derailleur (either Acera or Alivio). For my crankset ...
0
votes
1answer
46 views

Is there a front derailer clamp diameter that is near 29.6 or 29.7mm?

I have a 1966 Schwinn Super Sport that I bought without a front derailer. The seat tube clamp diameter (i.e., the diameter measured out outside the seat tube, where a derailer would go) is ~29.6mm. ...
2
votes
2answers
1k views

Deore Derailleur w/ Tiagra STI Shifter Compatibility

I have Shimano Deore RD M591 Rear Derailleur (http://www.jensonusa.com/Shimano-Deore-M591-9-SPD-Rear-Derailleur) that I am having trouble dialing in shifting when used with Tiagra 4700 2x10 STI ...
3
votes
1answer
333 views

Will Shimano M6000 Rear Derailleur SG (medium cage) work with cassette other then 42t?

I was thinking about buying Shimano Deore groupset to upgrade my ride, checking both older M610s and newer M6000s. The hitch is I want 2x10 set commuter flavor. That means narrow ratio cassette, like ...
4
votes
2answers
320 views

Mystery little bolt fell off near rear axle

Hi All! Please help with advice. I was doing some regular brush cleaning on my new Diamond Mission Pro bike that I purchased off the diamondback website (less then month old). A little bolt near rear ...
0
votes
0answers
44 views

From Campy Nuovo Record to Simplex SLJ6600

After reading about the superiority of the rare Simplex SLJ6600 derailleur, I want to know if it will be an easy swap on my 1980 Motobecane Le Champion, which came with and has the Campagnolo Nuovo ...
2
votes
1answer
100 views

Mating Brifters and MTB drive train and disc brakes - Marriage or Divorce

Looking to buy a Salsa-Cutthroat equipped with SRAM Rival brifters; a 1X drive train (11-42t rear cassette RAM Rival long cage deraileur); SRAM GX 1000 crankset; and SRAM Rival Hydraulic Disc Brakes. ...
1
vote
1answer
104 views

Incompatible front derailleur/crankset?

I recently bought a Tandem from the 90's and now trying to adjust the derailleurs. But, no matter what I do, I don't manage to properly set up the 3-way front derailleur. It either properly shifts ...
2
votes
2answers
286 views

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

I've heard that it's possible to run the same derailleur with different shifters to get a different number of gears. I would like to know what the limits are to this idea. I want to keep my Shimano ...
0
votes
1answer
46 views

Upgrading an old Trek

I have an old Trek from the early 80's, the serial number says its either a 610, 613, or 614. A lot of the parts are getting old and I'd like to replace a lot of them. One part that I an not sure on ...
4
votes
6answers
1k views

Fitting a 9-speed 11-50T cassette on MTB: which derailleur?

I'm trying to understand if its possible to fit a 9-speed 11-50T cassette (found one on Ali) on my MTB. The plan is to go 1×9. The problem is that I can't seem to understand the if a specific ...
3
votes
1answer
60 views

Replacing one derailleur with another type

I have an older bike (between 10 and 15 years old), which has a alivio derailleur. It's an 8 speed, and I just replaced the cassette, chain and crank set. I noticed that there was a large amount of ...
2
votes
2answers
235 views

Help! I've rounded off my bolts!

I was working on my bike and was about to add some more tension to my SLX clutch mech. While trying to remove the clutch cover I accidentally rounded off the bolts, so I have no way of getting the ...
1
vote
1answer
104 views

Why is my Ultegra 6600 much noisier when cross chaining compared to my Deore XT M8000?

This has been bugging me for a while. The Ultegra has no visible wear. The chain has no measurable stretch. The Deore is silent even when dirty and not oiled. The Ultegra is much noisier when freshly ...
0
votes
2answers
49 views

Chain not sliding into casette perfectly

I have a RD 7900 derailleur and a standard 105 28t casette. After replacing my wheelset I observed after I put my bike on the workstand that the chain is not sliding in perfectly into the casette ...
2
votes
2answers
1k views

Shimano: what's the difference between medium cage and long cage?

I'm looking at XTR Di2, and it seems the rear derailleur comes in 2 variations: medium cage and long cage. What are the two sizes for? Do they match different types of cassettes? What kind would I ...
0
votes
1answer
153 views

Shimano RD-5800 and 7 speed cassette

Is Shimano RD-5800 rear derailleur compatible with a 7 speed cassette?
2
votes
3answers
741 views

Why does my rear derailleur's indexing work for either the high or the low gears, but not both?

I am adjusting my rear derailleur indexing. It seems impossible to find the correct tightness. When I tighten the tension with the tension barrel adjuster, I have one of two problems: either it is too ...