Questions tagged [gears]

Gears in the drivetrain of a bike.

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2
votes
2answers
583 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 ...
1
vote
2answers
680 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 ...
3
votes
2answers
269 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 ...
3
votes
2answers
331 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
135 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
3k 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 ...
2
votes
3answers
169 views

Using a series of hub gears

I have an idea and I'm wondering if it's feasible. For an upcoming recumbent cargo touring build, I wonder if I could say use an 8-speed hub gear connected directly to an identical 8-speed hub gear, ...
2
votes
1answer
68 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 ...
3
votes
3answers
736 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 ...
2
votes
2answers
1k 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.
13
votes
2answers
1k views

Setting chain length

My chain broke and in a moment of silliness (I was cold wet and slightly annoyed) I threw the broken one away before thinking about measuring the new one. Is there a guide to getting the chain ...
1
vote
1answer
316 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 ...
2
votes
2answers
1k views

Increase teeth on cassette from 11-32t to 11-34t 9 speed

I have a new (to me) road bike with a 11-32t rear cassette and have Sora 9 speed derailleur. Even though I have been riding mountain bikes for some time I am struggling for a lower gear on the hills. ...
3
votes
3answers
1k 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
105 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 ...
2
votes
0answers
77 views

Ever heard of a snapped rear gear sprocket? [closed]

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
950 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
1answer
2k views

Shimano Nexus 3 stuck on lowest gear

I have a bike with Shimano Nexus 3 gear, and it's stuck on lowest gear. However, if I move shift pin that changes gears it changes the gears. So Nexus itself seems to be working, but the pin is not ...
1
vote
3answers
248 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
994 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....
3
votes
1answer
681 views

Campagnolo Cambio Corsa primitive derailleur — can it be recreated?

Does anyone make this sort of system and sell it today, or is my only option looking for someone selling theirs? I've googled whether similar systems are being made today but found nothing to my ...
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 ...
4
votes
3answers
632 views

Half speed internal hub gear?

Rather than resort to radical gears such as a very small granny chainring (such as 20T) and a very large rear cog (40T), both of which can cause some problems for derailleurs as well as other problems ...
3
votes
3answers
102 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
166 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'...
13
votes
2answers
6k views

How efficient is string bike? Is this really a revolutionary bike?

Bicycles are getting evolved with good technologies or methodologies as the period changes. Now, this one bike, so called string bike has been introduced, which doesn't have chain, derailleur but ...
2
votes
1answer
137 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
8k 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
4answers
1k views

Help understanding effect of Crankarm length on gear ratios

Trying to learn more about bike fit and gearing, and having trouble understanding the effect of crankarm length on gearing. In an article on bicycling.com it states "The relative jumps between gears ...
3
votes
1answer
195 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 ...
9
votes
4answers
7k views

Chain skipping on some gears

I have an old cruising bike with 21 gears. A few months ago I was pedalling back home when my chain broke, and I was only able to get the chain replaced this week. After having it replaced I noticed ...
2
votes
1answer
101 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 ...
0
votes
3answers
675 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 ...
0
votes
2answers
75 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
127 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 ...
2
votes
3answers
3k 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
2k 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
79 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
6answers
15k views

gears slipping after a chain change

I have a Lappierre Zesty 314 (2012). I'm running xt rear mech, a slx front mech, and my crank is xt and rear cassette is xt and xt chain. I went to the forest of dean and after the day was over I ...
1
vote
2answers
594 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 ...
1
vote
5answers
6k views

Is it OK to have a single front chainring paired with 7 speed at the back?

I'm planning to have a single front chain ring to be paired with my 7 speed at the back. I'm still saving up for a 10 speed.
0
votes
2answers
341 views

Can I expend same or less effort riding a mountain bike than road bike?

I know nothing about engineering. I feel like I can expend the same or even less effort riding a mountain amd a road bike (if going slowly) but feeling is not reliable, so I hope to get some insight ...
2
votes
2answers
173 views

Problems with shifter?

I have problem with my gears. How can I fix this or where I can find wire like this?
5
votes
4answers
1k views

The shifter for the front derailleur is “soft” in my vintage bike

So I bought a used vintage bike. I just love the bike and it's awesome. However it came with one problem: gears problems. First of all I have very little experience with bike, especially gears (...
3
votes
1answer
490 views

Front gear issues with middle ring (not always making it over)

I've been trying to straighten out some shifting issues on a kid's bike, it's a Diamondback and is a few years old. On the front gear-set it has a few issues that I am having trouble fixing through l ...
3
votes
2answers
813 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
3
votes
1answer
111 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
3answers
148 views

Converting 3×7 speed into a 2(chainrings)×1(sprockect)

I own Firefox Rapide 21s, which has Acera 7s(14-28t) groupset are rear and Tourney 3s(28-38-48t) groupset at front. In a recent accident, the rear derailleur took some impact and is bent now, it ...
2
votes
1answer
147 views

Hot water to unjam trigger shifter

Can I use hot water to unjam my Shimano trigger shifters? Has anyone had any experience with this?
2
votes
4answers
407 views

Gears shift perfectly when suspended on rack, but not on the ground?

So I had recently solved some issues I was having thanks to the community. I re-tuned my bike on a suspended mount and everytning looks great. On the ground, all of the gears work smoothly except for ...