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1
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1answer
15 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 ...
1
vote
3answers
42 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 ...
-4
votes
2answers
49 views

How does a RD (rear derailleur) handle variable tooth gaps?

I am trying to better understand how a rear derailleur (RD) works. I can understand how the RD moves inward and outward but suppose someone changes several of their cogs on the cassette. Let's just ...
0
votes
3answers
74 views

gears overshifting issue

As I have explained in my previous post here I have changed my rear shifter cable and housing. But I'm still having issues with shifting gears smoothly. It overshifts at particular gear combinations ...
5
votes
1answer
203 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 ...
2
votes
1answer
70 views

Bent rear derailleur (RD-5701)?

I was cleaning the chain on my CX bike today, and while cleaning the rear derailleur I noticed the following: When moving the cage from one extreme to another, the cage body will rub against the ...
-1
votes
1answer
71 views

automatic gear shifting (slack chain) when reverse pedalling

I'm quite new to bikes. Thanks to youtube I fixed some of the shifting issues I had in the front derailer and now I can shift to all the gear combinations. But I found a something strange when I'm ...
4
votes
2answers
138 views

Poor shifting in dense fog?

I cleaned up my bike yesterday after a particularly wet and muddy week, wiped the oil off the chain, applied a fresh batch, took it for a spin and found no issues whatever with the shifting (I go ...
9
votes
3answers
223 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 ...
1
vote
2answers
564 views

Bike won't shift into 2 largest rear cogs (lowest gears)

I replaced the rear derailer on my bike after Schwinn sent it to me. The old one had a bent piece. I can't shift onto the largest 2 rear gears. I set the shifter to the lowest setting, but the chain ...
1
vote
2answers
80 views

Can't shift to small chainring

While riding yesterday I could shift into the big chainring, but to get back to the small chainring, I had to dismount and press on the chain with my hand (I'm not talented enough nor inclined to ...
1
vote
1answer
42 views

Pannier rack restricting dérailleur movements

I fitted a pannier rack to my bike and the placement of it caused the rear derailluer cable and housing to be pushed outwards slightly, increasing the tension in the cable, I guess. The derailleur ...
1
vote
1answer
30 views

I have an old Sugino 110mm BCD ring set, can I replace low ring with SHIMANO FC-5650 chainring 34T?

I have a 48 tooth main ring with 165 cranks. FD is Sora double and rear is Tiagra short with Shimano 7 freewheel. If I can put this 34 ring on it gives me sufficient range for the next few months and ...
5
votes
2answers
114 views

3 Speed Front Derailleur can't reach small gear

I bought a new frame and put my old Campagnolo Racing T components on it. The seat tube has a diameter of 35mm and I use the Campagnolo 35mm clamp for the Racing T derailleur. The problem is the ...
0
votes
2answers
141 views

Disable index shifting to create friction shifting possible?

I have a 6 speed freewheel on a Diamondback. I tried to replace some busted shifters with an 8 speed indexing shifter that was on clearance. It appears that each shift's spacing of the shifters is ...
2
votes
4answers
737 views

Do I have to stop pedaling when shifting up the front chainring?

If I keep pedaling when shifting up the front chainring, it would fail. Moreover, the chain keeps rubbing with the chainrings and produces many noises. Thus, I have to stop pedaling for around one ...
0
votes
1answer
378 views

Shimano revoshift 7 speed use

I just got a Nishiki cross bike and it has a Shimano Revoshift 7 speed. The bike is about 3 years old or so and did not come with a manual and I am a biking novice. The shifting I understand. The ...
0
votes
2answers
110 views

Shifting 1>2 does nothing, shifting 2>3 puts me into 2nd. What's wrong?

I'll be in first gear on my front derailleur, and shift up to 2nd. Nothing will happen at all. Then I'll shift up to 3rd, and I'll finally switch into second. 3rd gear is inaccessible. What could be ...
0
votes
1answer
291 views

Why can't I drive my city type (folding) bike uphill?

I'm a newbie when it comes to biking. I don't plan on taking it as a very serious hobby; I'm really more of just a leisure rider who enjoys touring around town, but I'd also like to be able to drive ...
3
votes
1answer
520 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 ...
3
votes
4answers
3k 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 ...
1
vote
3answers
172 views

Rear shifting - Unable to shift to toughest gear

I was adjusting my rear shifting following the advice in this video: It was when I took off the wire tension and screwed the high limit all the way out that the chain ...
7
votes
6answers
3k 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 ...
0
votes
2answers
242 views

Upgrading rear derailer and cassette

I recently got what most people would consider a cheap and toy road bike as a gift. It came with very primitive RD and cassette (shimano SIS? I think). I enjoy upgrading my stuff, my question is, ...
3
votes
1answer
471 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 ...
0
votes
0answers
1k views

SRAM Red 22 crankset & 10 speed cassette

I have a 2010 SRAM Red 10 speed groupset on my bike, and I have just changed the front crankset to the latest SRAM Red 22 compact; I will also add a new KMC KMC X10SL chain. The Front derailleur no ...
0
votes
2answers
847 views

8 speed shifter with 7 speed cassette

I just got a bike with broken hanger and derailleur. As the owner didn't want to put money in good parts, I installed a cheap Sunrun derailleur compatible with index, and a new hanger. Just after I ...
0
votes
1answer
714 views

shimano 14-34t megarange casette not shifting to first gear

I bought a new deraluier and it wont shift to the first aka largest aka closest to the wheel / dropouts gear its about two inches too high. So it (the deraulier) knocks into the largest easiest cog. ...
4
votes
3answers
261 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 ...
1
vote
2answers
334 views

Shimano Revo shifter does not shift [closed]

I have recently bought a new bicycle and the left Shimano Revo shifter (3 speed) is not shifting, what can I do?
3
votes
1answer
173 views

Chain overshoots cog when shifting from low to high gears

Hi when shifting from low to high gears my chain is overshooting the cog and jumping into the next one. I tried turning the low limit screw outward to move the derailer in towards the low gears but it ...
7
votes
6answers
18k 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 ...
0
votes
0answers
30 views

Problems shifting under load [duplicate]

I've spent hours with my bike on the stand. On the stand: it performs great. When I ride, I can cause the rear gears to shift just by changing how hard I pedal (the harder i pedal, the higher up on ...
4
votes
2answers
1k views

(Automatic Bike Project) amount of torque required to change gears?

I am planning to build an electronically controlled automatic bike transmission for my senior design project. I'm personally more of an electrical guy, so dealing with the mechanics is somewhat new to ...
0
votes
1answer
428 views

What are the standard shifter designs and mechanisms? [closed]

What are the standard shifting methods? I only know the shifting dial on flat bars and the old fashioned levers on ten speeds. I'm not asking about when to use a particular gear but the mechanics of ...
4
votes
2answers
706 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 ...
3
votes
1answer
6k views

Cant get my rear derailleur to reach all cogs

I have been having an issue on my road bike getting the rear derailleur to reach all of my cogs. I can either not reach my two smallest cogs or two largest cogs depending on the cable tension. I ...
4
votes
2answers
435 views

Are there any tricks or pitfalls in timing gear changes?

I have noticed that my bike sometimes changes gears incredibly smoothly—quietly, quickly, very little 'jolt' through my pedals—while other times I get a rough, clunky change. I'm wondering if there's ...
3
votes
4answers
919 views

Shifters compatible with: SG-3D55 (Shimano Nexus 3 speed - disk brake - internal gear hub)

I am planning to buy the SG-3D55 internal gear hub. According to this forum post, the SL-3S35 is compatible. But what about the other 3 speed nexus shifters? I am finding it hard to find any ...
1
vote
3answers
3k views

Gear up-shift not smooth

When I am pedaling hard and shift to a larger sprocket, the shift is not smooth or sometimes doesn't happen at all. Sometimes even double up-shifts don't work. There is no problem shifting when I test ...
8
votes
9answers
4k 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 ...
21
votes
9answers
8k 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 ...
6
votes
1answer
462 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 ...
0
votes
2answers
227 views

Unable to change from 14th to 7th

I've got a bike that I have had for about 8 weeks and it has already been back to be serviced twice. It's just returned from the second service and I've noticed that it is not shifting from 14th to ...
4
votes
5answers
17k 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 ...
1
vote
3answers
2k views

How do I prevent STI shifter cables from blocking access to my Randoneering Bag or Handlebar bag?

I've got drop bars with Shimano Tiagra STI shifters and want to use a Rando Bag on my small front rack or a handlebar mount bag. Currently the shift cables jut out between the drop bars and hit in to ...
1
vote
2answers
543 views

SRAM force rear shifts go in the wrong direction when on largest cassette

I got a new bike about 6 months ago with SRAM Force on it. It's my first time riding SRAM and I love it except for one thing: If I'm climbing and my RD is shifted all the way up ( to 28-tooth ) and ...
1
vote
1answer
310 views

Bicycle is Having a hard time Shifting — especially gears 13 and 14

21 speed commuter bike. Raleigh 2011 brand. After my gear shifter cable was broken, I took it into the shop to get it fixed. (4 days ago). Ever since, when shifting, it takes forever to actually ...
2
votes
2answers
234 views

How do you switch grip shifters from shifting as if they were on the opposite derailleur?

I was replacing cables on grip shifters recently and when I put them back together they acted as if they were on the wrong side. By that I mean the front shifter (3 chain rings) were shifting 7 times ...
10
votes
10answers
23k 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 ...