Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [gears]

Gears in the drivetrain of a bike.

0
votes
1answer
38 views

Converting Sram Force 1 to Sram Force 22

I am buying a Sram Force 1 groupset with a new bike and I cannot test it before buying. In the case I really dislike the gearing steps issues, how difficult/costly would it be to convert to Sram Force ...
0
votes
2answers
53 views

Defective gear shifting down

My mountain bicycle has 3 chainrings at the front and 7 cogs at the back, making it a 21 gears bike, which are shifted by a derailleur system. Although it is 25 years old, everything seems to work ...
2
votes
0answers
39 views

Can I use Shimano's Di2 e-tube project software to do a custom lock out of additional small sprockets while in the small chainring?

Context: I'm designing a drivetrain for a touring triple-tandem that I'd like to have a very wide gear ratio. I plan to use the Shimano Di2 derailleurs (long cage RD-M9050-SGS and 3x11 FD-M9050) to ...
2
votes
2answers
89 views

Inexpensive 1x10 gearing?

Can I use a single speed crank (like a Shimano Vee) paired with an 7 speed rear derailleur and 10 speed 12-32 rear cassette to make an inexpensive 1x10 gearing, for non-technical trail riding? Is ...
2
votes
1answer
59 views

Rear derailleur hitting spokes in 4 largest cogs

I did a big mistake and bought a cheap bike for casual use. On my first ride I fell down on to the right side of the bike. I am not sure if it is this fall or just that the bike is poorly assembled ...
1
vote
1answer
91 views

Cross-chaining on a 3x6 system — how bad for wear?

I keep an old 3x6-geared MTBSO near work, and the front shifter is currently broken (smashed plastic gripshift). It will be a few weeks before I can get it home to replace it with a spare, so I've ...
16
votes
4answers
3k views

10 gears to singlespeed

My second hand Hercules bicycle came with 10 gears. Two gears in the front and five in the back. The gearshift does not work well and since I cycle in the same gear all the time anyway, I consider ...
7
votes
2answers
693 views

Rear derailleur cage bigger than cassette necessity

I use a Shimano Ultegra 6600 rear derailleur with short cage in a 11/28 cassette. The derailleur is at the end of its useful life and would like to exchange for a cheaper one, since I intend to ...
3
votes
1answer
314 views

Chain get stuck on front sprocket during pedalling

When pedalling the chain sometimes get stuck on the front sprocket. This happened after I cleaned the gears and replaced the chain. What could cause this? The purple line is the chain. The circles ...
1
vote
1answer
49 views

Tiagra rear derailleur and Deore crankset + derailleur compatibility

I want to buy this bike: http://en.author.eu/adventure/gravel-bike/author-ronin-2018-ua42901301-1154 For most time, I will be fine with the lowest gear being 34x34. However, occasionally I would ...
2
votes
1answer
83 views

Is the second decimal important in the ring/cog ratio?

The ring of my single speed is starting to wear out now that I'm approaching the 10k km and I'm planning to do an upgrade. Most of the crank sets that I find interesting only come in 48–51 teeth. I'...
-1
votes
2answers
125 views

What's wrong with my gear shifter?

The mechanism inside one of my gear shifters is a bit skewiff and I can't lock the cover on properly. Any idea what the problem is? Pictures of the dodgy one and the ok one for comparison with the ...
0
votes
3answers
170 views

What are all of the speed numbers for a bike?

If you are buying a bike, there are a lot of different speeds. Is there a complete list of speeds? I'm trying to create an array... var allSpeeds = ["single-speed","3-speed","12-speed"];
-1
votes
1answer
114 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 ...
4
votes
1answer
124 views

Feeling of click/slip when pedalling

This is very hard to explain, but I will try my best. I recently got a Shimano Ultegra cassette, crankset, front and back derailleurs, chain, and cables installed on my Giant TCX SLR1 2015 bike. ...
1
vote
2answers
77 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 ...
2
votes
2answers
117 views

New derailleur - shifts up smoothly, or down - but not both

I've just replaced the rear derailleur and cassette on my bike. I have Shimano Tiagra 9 speed shifters. The cassette is now a 9 speed 11-32 and the derailleur a Sora RD-R3000-GS. I've set the limits ...
2
votes
2answers
297 views

Lost teeth on second ring?

I'm thinking of buying a second hand Shimano FC-TY30. However, looking at the photo there seems to be either worn or chipped teeth on the second ring1. Are they actually broken/chipped, or is that ...
0
votes
2answers
79 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
62 views

Gear shift wire on SRAM after an accident

Took a pretty good fall after narrowly avoiding being hit by a speeding driver in the middle of a two lane road. Managed to get the chain assembly back together but can’t figure out where this wire ...
2
votes
3answers
93 views

How to compare an IGH (Shimano Alfine 11) with a 10 speed cassette and 3x chainwheel?

I'm try to compare the gear ratio of a IGH (Shimano Alfine 11) with a 10 speed cassette + 3 chainring setup. I read Sheldon Brown's gain ratio definition. I went to Sheldon Brown's gear ...
1
vote
1answer
96 views

How to change small chainring

I have a bike with a 46/36T crankset (FSA Gossamer Cross BB30) and I'd like to change the small chainring to an even smaller one. ​Googling around ​suggests that the smallest chainring I can get for ...
3
votes
2answers
203 views

Best Way to Upgrade My Bike

About three months ago I bought a second hand bike for £70; to be honest it is reasonably good. Current setup for gears is a 2 x 18 (38-48 front, 13-28 rear). As far as I can tell it's not a branded ...
2
votes
2answers
237 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.
3
votes
3answers
531 views

Can a 21 speed Shimano Tourney groupset get converted into a 7-speed?

I currently ride a 3x7 Tourney bike, which I’ve upgraded moderately and it is riding nice. I’d like to know if I can somehow replace my 3-crankset for a simple one, and also get rid off the front ...
1
vote
1answer
77 views

Why won’t my gear change off of 5?

My bike is a pretty terrible mountain bike held together by duct tape and I just fixed an issue with the brakes rubbing on the wheel slowing it down. And now my gears stop working. No matter what I ...
1
vote
0answers
68 views

Ever heard of a snapped rear gear sprocket?

Has anyone come across a rear gear sprocket snapping before? A clean break straight across the diameter. Happened at bottom of hill but not excessive force by any means. Not new but not terribly old ...
3
votes
2answers
774 views

Dual shift levers, old bike and indexed gears

Long story:  I once built a road bike for my wife over 30 years ago. It has Reynolds 531 tubing / 501 forks and alloy parts, so it is quite a decent build. However, my wife has been put off ...
1
vote
3answers
114 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 ...
1
vote
1answer
234 views

Help! Want to convert 8 speed Kona road bike to 1x drivetrain

I currently have a 2015 Kona Rove AL with Shimano Claris 8 speed drivetrain; running double FSA tempo chainset in front. This is the link to Kona’s specifications for the bike: http://2015.konaworld....
7
votes
1answer
1k views

What does a gear 'spinning out' mean?

I'm asking as I'm reading Sean Kelly's autobiography, where he uses the expression when he and his team were at the front of the peloton, trying to reel in a breakaway: It was a long, long chase ...
2
votes
1answer
600 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
3answers
94 views

RB not ridden in 4 years unable to shift gear

After a bit of advice. I recently dusted down my Carrera after a 4 year stint in the shed. Knowing that it had a few issues I dropped it in to my local Halfords store. It required a few things mending ...
0
votes
1answer
69 views

High to low gear shifter on derailleur gear bike?

Inherited this bike and it's got this strange gear shifter that I don't understand. The one on the right is one to five with six spaced a little further away. It's got a 3 and 6 cog derailleur as you'...
2
votes
1answer
109 views

Chain Pops When Leaving Cogs

This problem has consumed a lot of time and resources and has yet to be solved. This is a basic Giant Iguana mtb, with a Deore rear derailleur, SRAM 950 9-sp cassette, Truvativ chainrings, Shimano ...
33
votes
5answers
7k views

Why are most bicycle gears designed to have so much overlap

For bikes with a front derailleur, I've noticed that the gearing ratios of most bicycles are not linear, and there is an odd "overlap" between those power ratios as you switch from one front gear to ...
4
votes
1answer
584 views

Downtube shifters won't stay in low gear on rear derailleur

I've finished a bike restoration today and it's my first time using downtube shifters. They work and will span the full range of gears but won't stay in the big cog on the back for long, the shifter ...
3
votes
1answer
134 views

Will this chain work on my bike?

I've bought the Shimano HG40 chain which is advertised as a 5,6,7 and I think 8 speed chain. I've just received it and it also says 15,18,21,24. (Obviously including the front gears). My bike is a 2x6 ...
2
votes
1answer
71 views

Can I upgrade a Hercules Dirtrider 26" with gears and a disk brake?

I found that dropouts are needed for derailleur setup & fork space>120mm...can I install any hanger or weld a dropout to the frame?...and also the fork end gap was around 105mm in wheel fitted ...
1
vote
0answers
96 views

Gear change recording

Has anyone heard of a device that records gear changes? Like a cadence sensor or power meter, but specific to recording when you change gear. With all the data we can currently capture about our ...
0
votes
2answers
66 views

Timing Yourself To Determine Gear Ratio/Torque

Since there are so many types of bikes IGR, belt, and gears, I have resorted to doing timed runs with the bike to determine how high the torque is. I throw it into the highest gear and ride on flat ...
5
votes
1answer
124 views

Do pros ride with 1X configuration on some courses?

I'm looking at the first stage of the Tour of California, which is on a flat course (around Long Beach, USA). Since there's no real dénivelé (french, "difference in height"), there is no need for a ...
3
votes
2answers
645 views

Best option to upgrade 7-speed bike to higher gears

I have recently bought Giant Escape 3 hybrid bike that came with: Shimano FC-TY501 28/38/48 chainset 8/7/6-speed compatible Shimano Tourney RD-TY500 7/6-speed rear derailleur Shimano MF-TZ31 14-34T "...
-1
votes
2answers
64 views

The rear gears(Shifter) are stuck on 7 [closed]

So while I was taking my bicycle out of the elevator, it closes its doors(The elevator does not have sensors rather it has the mechanism which keeps the door open if you push a flap between the inner ...
1
vote
2answers
281 views

10 speed rear derailleur to shift 11-40 cassette on 3x10

This is a switch from 9 speed to 10 speed.... I have a 10 speed FSA carbon crankset 52-39-30 I wish to run cassette 11-40 10 speed... I will size chain length to shift 39-40 and 52-30 no interest in ...
2
votes
2answers
96 views

Problems with shifter?

I have problem with my gears. How can I fix this or where I can find wire like this?
2
votes
3answers
581 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 ...
3
votes
2answers
501 views

1x10 drivetrain against 1x11 drivetrain on mountain bike

What are the advantages/disadvantages apart from the obvious loss of one gear in the middle somewhere if both drivetrains start and end on the same size cogs
2
votes
1answer
95 views

Gear shifting : new to cycling maintenance

I'm new to cycling. I have a Soma Saga with SRAM X7 derailleur and Apex shifters. I have ridden about 200 miles on it. When I'm cycling, sometimes my gears shift/jump to the next gear on their own. I ...
0
votes
0answers
88 views

Bike pedals giving way

I just got a brand new Genesis mountain bike for Easter. Everything on it works fine except for when I’m standing on the pedals or going at a higher speed the pedals give way as if I’m changing gears. ...