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Questions tagged [gears]

Gears in the drivetrain of a bike.

4
votes
3answers
219 views

How much of a difference would shifting from a (24/34/44, 14x28) to a (28/38/48, 11x34) configuration make when going downhill?

I currently have a Proton MTB with a 24/34/44 crankset and a 14-28 cassette. I have found the configuration to be lacking when going downhill: The front chain ring doesn't feel stiff enough on the ...
1
vote
2answers
135 views

Is it possible that the gears switched from left to right?

I'm 100% sure that my gear levers on the right side are for my front gears and the ones on the left side are for changing the rear gears. After a muddy ride today it seemed that this changed. I was ...
1
vote
1answer
83 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 ...
3
votes
4answers
538 views

Shimano Revoshift twist grip unusably tight

Shimano twist grip shifter on Apollo Neo 6 girls bike. I bought this bike 6 months ago for my 7 year old. After getting it serviced at 99 Bikes the shifter was so stiff my daughter couldn’t change ...
2
votes
1answer
74 views

Need help to put gear shifter back together!

My daughter has Shimano SL TX30 gears on her bike....I think they might be Tourney, from searches I've done. The gears on the right handlebar has a button to go down gears. I stupidly took it off the ...
0
votes
1answer
42 views

How can non index shifters be limited to a specific range of gears?

Searching on eBay, I find shimano SL-MY34s. Description says that they should only be used with 5/6/7 gears. What limits them to this range?
0
votes
3answers
90 views

Why does my chain slips when I put pressure on my pedals

When I get on my bike and put pressure on my pedals or stand up and pedal, my chain slips. I want to know what the problem is so I can fix it myself as I don’t have a lot of money for a bike shop to ...
2
votes
2answers
54 views

Halfway through changing rear gear out cable

I stupidly started changing the outer casing on my rear gear without having cable cutter ready. Suffice to say I've messed up the cut and now I can't get the gear cable though the outer casing. My ...
11
votes
3answers
2k views

What is the generic name for the gear shifter where you have one trigger for the up shift and another for down shift?

I recently bought a bike with new advanced gear shifters where you can shift easily as the shifter has a trigger for the up shift and downshift? I would like to replace the twist shifter in my old ...
1
vote
2answers
191 views

How can I tell number of speeds on my road bike? 9, 10, 11?

How can I tell how many speeds my road bike has? I have a Shimano Ultegra groupset. Thx
0
votes
3answers
100 views

Issue shifting from largest cog to second largest

Got a Canyon Spectral 3 weeks ago, have done around 2 hours riding on it and have noticed an issue with shifting from the largest cog to second largest. The drivetrain is SRAM NX 1x12. There are two ...
1
vote
2answers
73 views

Will any Shimano mountain bike shift cable set work with any Shimano mountain bike derailleurs and shifters?

(Forgive me if this question has been asked before - but I don't know if I'm searching with the correct keywords to find the answer...) My rear derailleur cable is stuck hard into the side of its ...
0
votes
1answer
149 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
54 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
71 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
93 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
76 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
103 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
712 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
384 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
95 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
137 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
174 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
118 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
134 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
117 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
135 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
298 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
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
64 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
197 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
116 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
214 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
455 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
622 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
79 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
787 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
128 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
344 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
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 ...
3
votes
3answers
96 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
79 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
116 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 ...
32
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
738 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
137 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 ...