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Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

1
vote
1answer
62 views

Replacing Claris FD 2400 with R2000

My bike has a 2x8 speed Shimano Claris 2400 front derailleur and ST-2400 shifters. The FD is damaged. Can I replace it with the newer Claris R2000 FD? Shimano's compatibility guide indicates that it ...
0
votes
4answers
737 views

Strange long squeal sound when I pedal hard - how to track this down?

It's kinda hard to describe but there's a sound coming from somewhere on the bike when I pedal hard - I can't figure out where it's coming from. It's sort of like a high pitched pig squeal. It started ...
1
vote
1answer
72 views

Front derailleur range suddenly has become very short

For a while when I was riding, there was a stiff feeling changing from medium to high on the crank. Yesterday it wouldn't change at all. I checked the adjustment of the High and Low screws by ...
2
votes
0answers
34 views

What's the type of polymer material used in friction bushings in Sram rear derailleurs clutches?

The friction bushing of an (older) Sram rear derailleur clutch is shown below. What type of polymer material are these made out of? I'm also interested to know what friction materials are used in the ...
5
votes
2answers
2k views

How to adjust cable length on integrated brake/shift levers, when there is no barrel adjuster?

I feel bad asking this question because I've been doing bicycle maintenance for over 20 years and this seems like a noob question. I was unable to find a Shimano manual to answer this question. I ...
13
votes
6answers
37k views

Bike is shifting on its own

Ever since I got my bike (Surly Long Haul Trucker), it has been prone to shifting on its own. This is almost guaranteed to happen when I stand up on the pedals, and happens regularly when sitting as ...
1
vote
1answer
57 views

What front derailleur is this? Want to replace/upgrade

Hi I've bought a foldable bike and am thinking of changing the derailleurs to Shimano, but I could not figure out what type it is. The link the to the bike is: https://www.forever-bicycle.com/html/...
3
votes
3answers
6k views

SRAM X01 Eagle (12speed) in 11speed transmission: it work?

Well, I intend to use an SRAM X01 Eagle (12speed) rear derailleur in a 1x11 transmission (with a SRAM X01 "non-Eagle" 11speed trigger, cassette SunRace 11s 11-46, SRAM PC XX1 chain). Will it work ...
2
votes
4answers
14k views

Replaced chain, bike makes grinding noise?

Recently, I started going to a community bike shop to learn how to maintain and service my own bike. Ever since I changed the old, worn-out chain to a new chain with a master link, I've been ...
2
votes
0answers
46 views

SRAM eTap rear derailleur chain drop issue

I’m having an issue with my chain falling off the lower pulley wheel when (1) I hit a significant bump or (2) shift from large ring to small ring. But only in cogs 6, 7, 8. Any suggestions? I’ve ...
4
votes
6answers
2k 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 ...
1
vote
1answer
82 views

Pros and cons of long and short derailleur cage?

I'm thinking of buying a new derailleur in the future, but I don't know what type of derailleur to buy, there's long and short cage derailleurs but is there any differences? I'm not sure if this ...
1
vote
3answers
2k views

10 speed cassette/derailleur, but only getting 8 clicks?

I've got a 2013 Giant Escape 0 Hybrid with a stock 10speed Shimano Deore rear derailleur. My wife was riding the bike the other day, and somehow managed to shift in such a way that it popped the ...
1
vote
1answer
86 views

Levels of derailleurs, freewheels and chains

What are the levels of derailleurs (Shimano probably) I know Altus and Acera but don't know the higher end ones. I am putting this on my Sondors Fat ebike. I will be using a 7 speed freewheel, and a ...
14
votes
4answers
2k views

What options do I have if my rear derailleur breaks when I'm out on a trail?

I ran into an unfortunate situation earlier this week. I was out on a mountain bike trail, alone — just me and my hardtail. I'm pedaling, when I suddenly hear a CRUNCH and my bike stops. The hanger ...
1
vote
1answer
67 views

Broken Shimano FD-R453

I have a Shimano FD-R453 front derailleur that needs replacing. 50t and bottom pull with a 31.8 clamp. There are three gears in the front and 9 gears in the back. Could somebody help me with getting ...
0
votes
1answer
57 views

Change derailleur for new cassette?

I currently run Shimano SG-B-53/39 chain rings coupled to a 9 speed 13/23 cluster. If I was to change my cassette to a 9 speed 11/32 would I need to also change my derailleur?
0
votes
1answer
79 views

Need derailleur hanger

I have what I believe is a 1994 Cannondale. I need a derailleur hanger and I’m tired of thinking I’m ordering the right one and it’s not. Can somebody please tell me how to find out what my bike is? ...
12
votes
1answer
6k views

Selecting a front derailleur: parameters

The spec sheet for the Shimano Alivio FD-M430 front derailleur contains a number of points that I don't understand. What does "Maximum capacity: 22 teeth" mean? Why are "Top gear teeth" constrained ...
2
votes
2answers
63 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. ...
9
votes
7answers
65k views

Problem with chain skipping without trying to shift (even with new chain and gears)

I have a mountain bike where the chain intermittently skips when put under load on the middle (and very rarely on the smallest) chain ring. It is not related to shifting. I've taken several steps to ...
2
votes
1answer
98 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 ...
34
votes
5answers
11k views

Perfectly setting up gears - how?

Every time I have my bike serviced, the bike shop sets up the gears on a stand in their workshop. The gears change perfectly on the stand, but when the bike is on the road, the rear derailleur doesn't ...
6
votes
2answers
110 views

Can I use a narrowide chainring on a double rings crankset?

I would like to go touring using my narrowide chainring, but I would like as well to put a smaller chainring (the infamous Grannie) so that I could have it as a last resort in case of really hard ...
1
vote
1answer
208 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 ...
8
votes
3answers
8k views

When to replace rear derailleurs

What is the typical life cycle of mid-range rear derailleurs assuming no accidents? More precisely, what's the average mileage after which it's better to replace it rather than doing tuning all the ...
1
vote
2answers
65 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 ...
3
votes
3answers
330 views

Replacement for Suntour Superbe Tech Rear Derailleur

I recently picked up an 85 Cannondale ST500 with a Suntour Superbe Tech rear derailleur. The cage is bent and the bearings in the guides don't feel too fresh. I'm just starting to get into bike ...
4
votes
1answer
752 views

Trek 1.1 Derailleur Hanger

I've got a 2011 Trek 1.1, and my derailleur hanger broke in a crash a few weeks ago. I've tried both a number 5 and number 6 hanger, which are what WheelsMFG has listed, but neither seem to fit. There ...
2
votes
1answer
151 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 ...
1
vote
1answer
246 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' ...
22
votes
5answers
132k views

How to calculate the capacity of a rear derailleur

It's easy to calculate what capacity of a rear derailleur will be needed based on the size of the big and small chainring and the big and small cog. What about the converse question, how to calculate ...
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 ...
3
votes
1answer
164 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 ...
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
433 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 ...
3
votes
5answers
14k views

Shimano 105 rear shifting issues

I'm disappointed with my new Cannondale and it's 105 group, I expected this to be a major upgrade from my previous trouble free bike with the bottom end group set. It's done about 500 miles, had new ...
40
votes
10answers
22k views

What's the efficiency of hub gears compared to derailleurs?

What's the efficiency of hub gears compared to derailleurs? I know that hub gears are not as efficient. Apart from being heavier, how much will I lose in performance if I use hub gears?
3
votes
1answer
270 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
votes
1answer
119 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
109 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
92 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 ...
6
votes
6answers
7k views

Derailleur adjustment: front or rear first?

When adjusting both front and rear derailleurs, which should be done first?
2
votes
1answer
90 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 ...
1
vote
2answers
146 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 ...
5
votes
5answers
709 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 ...
0
votes
2answers
88 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
1k 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 ...
1
vote
1answer
142 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 ...
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 ...