Mechanism to move the chain from one sprocket to another.

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6
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3answers
298 views

Why are derailleur jockey wheels commonly made of nylon?

Almost all derailleurs seem to come from the factory with nylon jockey wheels . What is the rationale for the use of nylon (rather than alloy or aluminum)? Is it merely weight savings (which would ...
0
votes
4answers
211 views

Derailleur/Gears Locks Up/ Freezes Up/Stalls

Hey guys I have a specialized mtb with the old oval chainrings and lately it's been locking up. When I start pedalling "hard" or faster the crank stops turning and then jumps forward a bit and ...
1
vote
2answers
148 views

Is this cracked rear derailleur safe to use

So I've been building up a late 80's steel frame to a modern 11 speed, but still using downtube friction shifters. After doing a few runs up and down my street all felt OK so I decided to take it out ...
2
votes
2answers
59 views

How to replace derailleur cable housing?

My derailleur cable housing (sheath) has exploded: I bought a new sheath of the exact same length: PROBLEM: Now I realize that unlike brake cables that are like []------, derailleur cables seem ...
5
votes
2answers
151 views

Problems with front derailleur shifting on an inexpensive bike

I bought a cheapish bike (Nakamura) couple of years ago, and it generally serves me well. Main problem that I have is that shifting gears, especially front gears often gets out of tune. After only a ...
1
vote
3answers
526 views

Can't shift to gear one or two

I had an issue where every time I put my bike in gear 3, it would just keep "skipping". By this I mean that it wouldn't stay in gear 3; the chain would go onto it, then fall onto gear 4, then go back ...
5
votes
1answer
112 views

Can't push lever to shift into big ring, lever will not move all the way

I just installed a new 6800 groupset on my bike for the first time, and everything went O.K except for the front derailleur. I can't shift it into the big ring, if I push the lever to change to the ...
1
vote
3answers
334 views

My front deraileur needs adjustment after every ride

I have a Cannondale Women's Adventure 1 that I got this spring and have been riding on local (paved) trails every weekend. I started off riding about 6 miles a weekend and recently have progressed to ...
5
votes
3answers
288 views

Derailleur Pulley Wheel Compatibility

I can't find replacement pulley wheels for my derailer that are explicitly made for it. Should I be safe replacing them with a set with the same number of teeth (i.e., the same diameter) and targeted ...
7
votes
5answers
40k views

Can a rear derailleur be used for either a 9 speed cassette or 10 speed cassette?

I currently have a 9 speed 11-25T cassette on my road bike. I'm thinking about switching to a different cassette with more teeth on the climbing gear. The cassette I'm currently look at is a Shimano ...
3
votes
1answer
80 views

Shimano Sora 3500 (3x9) and Alivio front derailleur

Please help rebuild my bike :) I have Scott Sub 30 2011 http://www.evanscycles.com/products/scott/sub-30-2011-hybrid-bike-ec025449 and right now I would like to change shifters to Shimano Sora 3500 ...
0
votes
1answer
61 views

Going to one chainring: realign cassette farther in by redishing wheel?

The plan: move spacers around on the rear wheel to get the cassette about 8mm farther in for better range of access from the small chainring; re-dish wheel for proper alignment; shorten the chain a ...
1
vote
2answers
51 views

Trying to find Derailleur hanger for Triace A310

As you can figure out from a quick google search, this bike almost does not exist. Finding info for this bike has been near impossible. If you can direct me to any info about which hanger I need to ...
2
votes
1answer
90 views

gear shifting after changing cassette

I've just changed a worn out cassette on my road bike (SRAM 8 speed 12-26T) and replaced it with a Shimano 12-25T 8 speed cassette. Now it looks like my gear shifting doesn't work. I can't get into ...
6
votes
3answers
956 views

Different Gear Type when there's no Front Derailleur?

I have a 7 speed Jamis Boss Cruiser, 7 gears in back and one up front. I've been using it fine for several months now. Lately, the chain is coming off of the single front gear, usually after stopping ...
6
votes
1answer
121 views

Why are there so many types of mech hanger?

I have just stripped the threads on my mech hanger and I'm in the process of buying a new one. There are so many different types, even for one manufacturer, I was wondering what the reason for this ...
4
votes
1answer
73 views

Friction Shifter Rear Derailleur, Not Holding Low Gear

My 86' Raleigh 10 speed with friction shifters insists on not holding the lowest gear. If I hold it in the low gear, it will stay but the moment I remove my hand, it goes back up. I'm assuming it is a ...
2
votes
1answer
2k views

Stuck and stiff sora front derailleur

I have a used 2011 trek 1.2 compact road bike with a stiff Sora FD-3400 double front derailleur. Shifter seems very stiff, and when I shift above the second index (trim or third) by accident it gets ...
5
votes
2answers
3k views

upgrading an old bike gears and shifter

I don't have a whole lot of knowledge on this, but here goes. I have an old Murray Ultra mountain bike (prob. 15 yrs.+). It is a 15 speed bike, with a 5 speed freewheel. The whole Shimano system is ...
4
votes
1answer
45 views

Using 9 speed Deore front shifter with 10 speed Ultegra front Deraileur

I am trying to build a bike out of all the spare parts I have in my garage. I found a 3x9 Deore front shifter, 3x10 Ultegra front d and crankset. Would they work together? By the way, I am building a ...
5
votes
2answers
120 views

Refurbishing everyday bikes

I'm looking to get 3 family bikes functioning as well as possible. I've replaced all the cables, but now want to get the gears as close to new as is sensible. All bikes old >10 years I would ...
1
vote
3answers
2k views

chain getting stuck between chainrings

I have an old Cannondale road bike with Suntour shifters. When I shift from the front middle ring to the small inner-most ring, the chain falls into the gap and binds tightly between the two rings. ...
4
votes
3answers
406 views

How do I tune up the shifters/derailleurs on my mountain bike?

I have a Diamondback mountain bike with Shimano shifters that I bought used last summer, and over time the shifting has gone out of whack. For example, on the front wheel I can't shift into the ...
1
vote
2answers
814 views

What is wrong with my Shimano 105 5800 front derailleur?

Background: I've installed a complete new 105 group (this bike is a brand new custom build) on a Civia Hyland frame. The rear wheel has a white industries CLD disc hub for the 11 speed cassettes. ...
1
vote
2answers
120 views

Chain rubbing on new derailleur and crankset

My bicycle is a Rockrider 520. I have replaced my front derailleur with Shimano Acera FD-M390 and my crankset with Shimano Acera FC-M391. But chain is rubbing inside of FD even when FD cable is not ...
3
votes
3answers
192 views

Why is my bike slipping gears?

I have a 1997 Gary Fisher Tassajara that got a complete overhaul and tune-up at a bike shop a year ago. (to the tune of $180, but some of that was new tires- I'm the original owner) I ride between 4 ...
1
vote
0answers
29 views

Cannondale H400 1993 derailleurs

I would need to replace my derailleurs and I would like to upgrade both front and back. Front is triple 30, 40, 50 and rear is 13 throught 30. Both are Shimano Altus A10 with Rapidfire Plus ...
3
votes
2answers
256 views

Road Brifters with MTB Derailleurs

I've just bought a lovely Surly touring frame and I simply stuck all of my mountain bike components on it. That means I've retained a flat handlebar. I'd really like to stick drop bars on though and ...
5
votes
1answer
4k views

How do I tell if jockey wheels need overhaul or replacement?

I am refurbishing a bike and am deciding how much to clean out the rear derailleur. It's in pretty good shape. But after I take off the chain, I tried spinning the jockey wheels with my fingers ...
2
votes
1answer
132 views

Front shifter has three positions, but front chainring is only double. Is this a problem?

My Merida Cyclocross 3 bike has a double chainring at the front. After a few weeks of being a little annoyed about the awkward shifting when going up steep hills, I realized that the front shifter and ...
1
vote
2answers
271 views

10 speed cassette/derailleur, but only getting 9 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 ...
3
votes
2answers
273 views

Shimano Claris shifter double/triple shifting up (when moving to smaller, harder cogs) on the rear derailleur

Although my rear derailleur is properly indexed it's suddenly started to double or even triple shift on an upshift - i.e. when moving to harder, smaller cogs on the cassette. This happens whether I'm ...
6
votes
2answers
2k views

is this derailleur short cage or long cage?

I'm selling the rear derailleur off this bike, and someone asked whether it's short or long cage. I assume it's long. Is this correct?
2
votes
1answer
49 views

Not sure which limit screw is H vs L

I'm using a Devinci silverstone s.1 that's having trouble getting up to the highest/largest gear on the front. I checked the tension and it didn't seem to make a difference. Read I should check ...
1
vote
3answers
361 views

Campagnolo Crank Compatibility 11 speed crank to 9 speed chain/deraillieur/shifters

I need to replace my 9 Speed Campagnolo Racing T Crank with a new one which uses the power torque system. Is a 11 Speed Athena (or 10 speed Centaur) crank compatible with the racing t front ...
3
votes
2answers
1k views

Campagnolo QS Front Derailleur/Shifter Compatability

I have older Campagnolo Chorus 10-speed shifters. They are marked 'Carbon BB System'. I am replacing my front derailleur and have a spare 10-speed Record QS front derailleur. QS stands for Quick ...
2
votes
2answers
141 views

Campagnolo Athena - Lost plastic part on front derailleur. Now the chain is droping on upshifting

Somehow the plastic part on the side/front of the derailleur is lost. Now I can't shift properly because the chain drops to the outside on an up shift. The plastic part is visible in this image. Its ...
2
votes
1answer
104 views

what lubricant should I use?

The Jockey and idler of my derailer, are not spinning as freely as I would like. What type of lubricant should I put on these derailer pulleys to make them spin more freely?
2
votes
1answer
145 views

Touring Drivetrain Dilemna

I own a 2015 Specialized AWOL Elite and love it except when I am fully loaded and lumbering up a pass. I'm looking for a way to get more range without completely replacing my drivetrain. This ...
1
vote
2answers
85 views

Chain Slip at front changing from large to small front chain wheel (with large cog at back)

I have a Pinnacle Neon 3 Hybrid, Shimano Sora 9 speed cassette and 2 chainrings at the front. The bike is 2 weeks old and I've cycled around 65 miles so far. Chain ring has come off 3 times at the ...
9
votes
5answers
3k views

Why do current, entry-level shimano rear derailers have large-diameter pulleys?

I have seen (and recently bought) entry-level rear derailers from Shimano (Tourney for MTB, 2300 for road bike), and I keep wondering why they are making these parts with such large pulleys. I don't ...
5
votes
7answers
38k 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 ...
1
vote
1answer
72 views

mix left shifter and font derailleur of different speed

I have a Shimano 5700 front derailleur and 5700 flat bar shifter (left) but for some reason I can't use the FD on my frame (too narrow, my driven train is 9 speed). After lot of research some people ...
3
votes
1answer
123 views

Indexed rear derailer shifts two cogs for each step

I'm trying to troubleshoot poor shifting issues on a mountain bike that appears to have been built out of the spare parts box… The current problem is "instability" on the rear derailer – the chain ...
4
votes
2answers
9k views

Road Shifters, Mountain Rear Derailleur?

I have a road/cyclocross/commuter frame that is currently spec'd with road components - all Shimano 105, with an Ultegra rear derailleur. The cassette (10 spd) tops out at 27 teeth, and the rear ...
2
votes
2answers
484 views

Can I replace my Shimano RX 100 with a Campagnolo group?

I just purchased a Concorde Mistral with Columbus Gara tubing and would like to transfer my Campagnolo group from an SLX frame that is too big. The Concorde frame has a front derailleur mounting ...
1
vote
1answer
158 views

My calf catches my derailleur when I pedal

I wore cycling shorts for the first time since purchasing my Ridley Liz and I found that my right calf was catching on my derailleur to such an extent that I ended up with no skin left on my leg. Is ...
3
votes
2answers
1k views

Shimano short cage rear derailleur capacity

Can an Ultegra or 105 short cage RD handle a 30T ?
2
votes
1answer
752 views

ideal dérailleur height for a Deore on non-round/oval Cranksets (e.g. a Biopace)?

Reading on every site about front dérailleur adjustment, the distance from the bottom of the outer dérailleur plate to the bigger crank cog should be "one penny". Mine is around 1cm! it does shift ...
0
votes
2answers
6k views

Can I change my 7-speed rear derailleur to an 8-speed?

I bought a 2013 Cannondale Quick 6 Hybrid for my daily commute almost exactly a year ago, and I'm looking to give it some upgrades. It currently has a 7-speed Shimano Altus derailleur, and I was ...