Gears in the drivetrain of a bike.

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-2
votes
3answers
111 views

Sensible shifting on a triple chainring?

I have found from experience on my 3x7 MTB that shifting a triple front chainring is useful if you do the following: I tend to use only the first 3 cogs in the smallest chainring so that is 3 very ...
1
vote
1answer
79 views

Ideal % jump between gears?

I am wondering if people prefer equally spaced gears (such as 20% per gear change) or if (like on motorcycles), the lower gears are spread out more and the upper gears are "tighter" (more closely ...
13
votes
5answers
3k views

Worries about a gear ratio of 1:1?

I'm planning a randonneur-like bike with drop bars, STI shifters, and nevertheless some low gears. The crankset could be a "compact plus" (I guess from Sugino), 44 and 28 teeths, and the cassette a ...
5
votes
2answers
212 views

How do I change the granny gear on a cheap Walmart mountain bike?

I have a cheap ($100) 26" Walmart mountain bike (Hyper Summit) that has a triple chainring (24,34,42). It appears there is no easy way to remove the granny gear since it has what looks like some type ...
2
votes
2answers
192 views

Triple chainring + nonstandard sloped cogset. Can this work?

It seems that on my mountain bike and all other multispeed bikes I have seen having a rear cassette or freewheel all have sloped cogs, meaning they go from largest to smallest in order of decreasing ...
-4
votes
1answer
98 views

Super close ratio high gears via double size sprockets… practical?

I am wondering why they use such small cogs on a bike. Problem with that is as you get down below about 15 teeth, you cannot get precise steps to the next gear. For example, you can go 15 to 14 or ...
-2
votes
1answer
72 views

Quad chainring (4x12)?

Does anyone yet make an affordable quad chainring? I would love to see a 4x12 with my staggered cog idea such that all 12 gears are shifted progressively using the 4 chainrings. Each chainring would ...
5
votes
2answers
1k views

what does a 22 gear bike look like?

I read that road bikes on average have around 22 gears and mountain bikes up to 30-40. But my hybrid only has gears numbered 1-3 on the left hand and gears numbered 1-8 on the right, so my bike's a 8 ...
5
votes
1answer
172 views

Back wheel started moving backwards when pedalling backwards

I have a 10 year old cheap 21 speed mountain bike that I have only ever done basic maintenance on (replacing inner tubes, tyres, brake pads, lubricating chain etc). I have just noticed that when I ...
1
vote
3answers
167 views

Is it better fitness-wise to ride at the maximum gear?

I just wanted to know if I will be doing more effort while riding at the maximum gear all the time, rather than changing gears constantly. My commute is an hour long, but I want it to be tougher on ...
31
votes
7answers
11k 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, a part from being heavier, how much will I loose in performance if I use hub gear?
1
vote
4answers
160 views

Gear shifts and drive speed on bikes

If I am driving in the 5th gear, can I know what is my velocity? Let's assume I am on a perfectly flat surface and moving monotonously.
5
votes
3answers
468 views

rear shifter lever gets stuck when shifting gears

All the shifting was working smoothly until my bike fell off to the ground (edit1: to my right side hitting the right side of the bike) with me couple days back. Now after about a week when I took my ...
3
votes
1answer
80 views

Chain is reluctant to shift into hardest gear on rear cassette

I have a Giant Escape, with Shimano Acera gears (3 speed on the front, 7 speeds on the back). When the chain is in the hardest gear on the front cassette, then it is reluctant to shift into the ...
10
votes
7answers
4k views

Does gear ratio affect Power?

Let me preface by saying that this may not be the right SE. I considered asking on the Physics SE, but I thought I might try here first. If it is wrong, I am not against it being migrated. From basic ...
3
votes
1answer
105 views

Can I use a 7 speed shifter on an 8 speed cassette

I am currently upgrading my mountain bike and have bought a set of wheels that accepts 8,9,10 speed cassettes but my previous wheels used a 7 speed freewheel. If i install the new wheels with an 8 ...
3
votes
1answer
193 views

Chain coming off with internal hub gear bike - why?

I have a Raleigh Caprice bike, about 7 years old, with sturmey archer 3 speed hub gears. There have been some problems with the hub gears in the past 9 months, which have been fixed by a mechanic. ...
-2
votes
2answers
279 views

What to upgrade to achieve a higher top speed?

I enjoy going fast and my current bicycle tops too early, what kind of upgrades would I need to make to achieve a taller final gear?
0
votes
1answer
90 views

Gear mis-adjustment. Loss of gears

How do I adjust the rear gears of a bike that will not change to higher gears? It is stuck in lower two or three gears.
7
votes
4answers
334 views

Best bicycle for a moderate to extremely hilly suburbs?

I've moved to an area that's notoriously hilly. I had gained a lot of weight but managed to ride it off by cycling in a well built but extremely faulty and wastefully heavy chinese bike. The gears ...
1
vote
2answers
106 views

chain jumping when puilling away in a higher gear

I replaced the rear cog as the chain I had snapped and I thought it had taken some teeth off. Now when I pull away in 1-3 gears it's ok, but if I am in gears 4-7 and I try to pull away ( say I have ...
2
votes
1answer
115 views

Changing Crankset on a bicycle

I have a fixed gear BTwin My Bike White. I need to upgrade but the resale value is too low for it. So I was thinking of adding gears to it which might click the real deal for me. Can I convert it ...
0
votes
4answers
215 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 ...
0
votes
1answer
122 views

Combine Nexus 3 Hub with Torpedo 3 gear shifter?

I have upgraded my bike with a Nexus 3 hub, but the corresponding gear shifter takes away too much handle space on my crooked handle bar (I have to grab the gear shifter during my rides). Hence, I'd ...
0
votes
1answer
98 views

Shifter clicks in but chain stays on the largest cog, when riding

I am able to change (click through) the shifter but the chain stays on the largest cog and does not move (This happens only when riding) but the gears shift as usual when the bike is stationary and I ...
2
votes
1answer
52 views

Double XT with XX1?

Is it possible to run Shimano front chain rings(xt 36/26)with xx1 for the rest of the drive chain? Currently running xx1 with 30 upfront. Loving it although am concerned I will need smaller gearing ...
2
votes
1answer
52 views

Separating the gear hanger from the derailleur

I am trying to exchange my rear derailleur. Now I have the problem of detaching it from the hanger, as you can see in the attached image, I was able to detach the gear hanger from the frame, but I ...
5
votes
2answers
155 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 ...
7
votes
1answer
1k views

Effect of Rear Derailleur Cage Length

What effect does the length of the cage on a rear derailleur have on bike setup/shifting?
1
vote
3answers
528 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 ...
4
votes
2answers
140 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 ...
2
votes
2answers
154 views

triple chainring with with single speed freewheel

I have a Hero Sprint Axis (with 18T freewheel).I ride mostly on flat roads, but want more top speed and a lower gear for starting from standstill. Is it possible to just install a triple chainring ...
1
vote
1answer
145 views

Front and Rear speed shifters aligment guide

How to align the front and rear speed shifters ? My chain dropped from the front chain ring, and I put it back on the first gear I found, then the rear one fall off, and I put the chain back on the ...
1
vote
3answers
908 views

MTB with gears or non gears, suspension or non-suspension for stunts?

I am planning to buy an MTB for learning stunts...(BTW my family wont allow me to buy a BMX because of its height). So my question is shall I go for MTB with front suspension or not and with gears or ...
4
votes
3answers
101 views

cross chaining 18 speed (2 * 9) bike

I have a 18 speed bike. There are two chain rings in the front and 9 cogs at the back. I am new to cycling and I wish to know which gear combinations should I avoid to prolong the life of the chain ...
3
votes
1answer
38 views

Adjusting Gear Actuation

I recently brought a second hand bike with Shimano Deore gears on it and when I switch up a gear on the chain-ring it requires a significant amount of actuation pressure on the 'flappy' paddle ...
2
votes
1answer
3k views

Bicycle slipping gears on middle sprocket gears 4-7

I see lots of questions on gears slipping but not sure it's the same as what I have. Out of 21 gears I only have problems with 4 (middle sprocket (2) on left shifter gears (4-7) on right shifter). ...
6
votes
3answers
957 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 ...
2
votes
2answers
441 views

Is a Shimano Dura-Ace 7800 rear derailleur compatible with a Dura-Ace 7900 11-27 cassette?

Is the Shimano Dura-Ace 7900 10 speed cassette with a ratio of 11-27 cassette compatible with a dura-ace 7800 rear derailleur? Some people say its fine but more important to me is what Shimano says ...
1
vote
3answers
20k views

How to fix problem with mountain bike chain falling off gears?

The chain on my girlfriend's bike came off the front gear today, it looks like the back gear changing mechanism isn't handling back-pedaling properly, whenever she pedals backwards the chain slacks ...
6
votes
5answers
2k views

Are single-speed bikes better equipped to handle cog/chain wear?

I need to decide between a single-speed and multiple-speed bike. I usually ride multiple-speed mountain/city bikes in the highest gear anyway (around town). They're not intended for that, and doing ...
7
votes
2answers
138 views

When is it time to replace the gear-cable housing?

Please keep in mind that this question is specific to mountain bikes which roll through lots of dirt and mud. I heard stories of bikes that had their cable housing last for years, but I doubt that ...
5
votes
2answers
127 views

Gears on a singlespeed frame

I'm building a new bike and have ridden a frame which feels (and looks) amazing. I'm dead set on buying it but it's a single speed frame. Ideally I would like gears at the rear. It has a dropout which ...
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
1k views

Pros and cons of gears in bottom bracket vs. rear hub? [duplicate]

Since 6 years, I am the happy user of a bicycle with a Rohloff internal hub gear. German quality squeezing 14 gears and a 526% gear range into the rear hub. Less known is the newer and equally ...
6
votes
1answer
177 views

What is the name of this type of bolt for the front crank on my bike?

I recently had to take the front gear off of my bike and had some difficulty undoing the bolts. Because of their poor condition, I have decided to replace them. However, I have no idea what they are ...
1
vote
0answers
32 views

3- 5 gear special gearset?

So, a while back when I was rebuilding my vintage Shogun 6-speed, I realized that I only use 2- 3 gears on my commutes to and from school, crew, and other daily rides. The next day, I went to my local ...
2
votes
1answer
49 views

Gears for Hero Cyclone

I have a Hero Cyclone bicycle that is a single speed. Can I add gears to it? If so, can anyone suggest me a good gear?
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 ...