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Gears in the drivetrain of a bike.

1
vote
1answer
84 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
1answer
115 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
87 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
423 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
72 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
65 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
743 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
90 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
107 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
148 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
87 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
53 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
86 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
224 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
123 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
54 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
87 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
64 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
122 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
209 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
61 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
112 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
77 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
232 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
252 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
90 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
87 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. ...
0
votes
3answers
74 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
95 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?
4
votes
4answers
267 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 ...
0
votes
2answers
172 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
4answers
140 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 ...
2
votes
3answers
946 views

All gears shift smoothly, but won’t shift into 1st gear/large cog. Help?

So I was tuning my newly acquired bike today and working with all 8 gears on the rear derailleur. I managed to properly set the high limit screw as well as cable tension so all gears shift smoothly ...
12
votes
7answers
5k views

What is the purpose of so many gears?

My bike, which I love dearly, has 21 gears, which appears to now be standard among mountain bikes. Is that truly better with a bike that has, say, 7 gears? And why is it that the amount of gears a ...
-6
votes
1answer
89 views

What is gear bicycle is it useful in countryside? [closed]

I want to know about multi gear cycle. My area is a flat surface. What's the major use of geared one vs. single speed bicycle?
3
votes
1answer
124 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 ...
9
votes
5answers
3k views

My bike goes up one gear at a time, but down two: is this normal?

Just over a year ago I bought a new bike (a Giant Escape 3) with a trigger gear system - my previous one had a grip-twist to change gears. After riding and experimenting for a while, I was able to ...
0
votes
1answer
80 views

Cables for my rear gears do not work

The rear derailleur on my Huffy 21 speed bicycle does not switch anymore. It will click and turn, but the gear won't switch. When I attempt to force it manually it switches back to the biggest gear (...
5
votes
2answers
279 views

Help me understand my 8-speed uniglide compatibility issue

I have a Dura Ace 8-speed uniglide rear hub/freewheel marked 'Integrated 8 SIS' and an 8 speed uniglide 14-21T cassette. Two issues - the first being that the smallest cog needs to be a special 32mm ...
3
votes
2answers
125 views

Which rear cog should I remove if I want to add a 26 for climbing?

I have an old road bike with 53-39 rings and 13-23 cassette. Although it's generally flat in my area, I like to get to the top of these hills where they put the radio antennas (without dying). Max ...
3
votes
1answer
236 views

Can't shift down from 50T with clutch on, but can shift down with clutch off, why?

Can't shift down from 50T with clutch on, but can shift down with clutch off, why? I'm using sunrace 11-50 and XT RD-M8000 (SGS), finished setting up everything for absolutely perfect shifting, then ...
0
votes
2answers
81 views

Issue with the gears? [duplicate]

My cycle seems to have this problem, that whenever I change the gear it starts changing from the second sprocket. Whenever I start from gear one it starts from the second biggest sprocket, though it ...
0
votes
1answer
61 views

What is a suitable Gear Range for Biking on Flat Rail Trails

My wife and I are 70 and are planning a purchase for relaxed riding exclusively on smooth (packed cinder/crushed stone) rail trails. We’re looking at comfort bikes like the Jamis Hudson Sport and the ...
0
votes
1answer
119 views

Can you use shimano m8000 replacement cogs to replace Sunrace mx80 cogs?

Can one use m8000 replacement sprockets 11T 13T 15T to replace the corresponding mx80 sprockets? I appreciate the clusters can't be switched due 3 free sprockets and 2 clusters of 4 on mx80 vs 5 free ...
0
votes
1answer
100 views

Rear gears not shifting between 6 and 7

I've just replaced the rear derailleur on my kids bike. I've fitted the biked with a Shimano Altus. The issue I am seeing is the shifting between gears 6 and 7. When I move from 7 to 6 the chain ...
1
vote
1answer
166 views

Gearing change on Mongoose Malus

I recently purchased a Mongoose Malus, I would like to change out the front gear so I have a true granny gear (ie really low gear) and am not concerned with the top end speed. Where can I purchase ...
4
votes
2answers
459 views

STI brake shifters for cantilever brakes?

I have a Jamis Aurora 2016: Jamis Aurora I'd quite like to convert it to have brake lever gear shifters (the shifters are on the end of the handlebar drops which I don't really like). But will they ...
3
votes
1answer
76 views

Do 6 speed flight deck shifters exist?

I'm interested in changing my bike from downtube to flight deck shifters, however I'm struggling to find any 6 speed flight deck shifters. I have a suspicion they don't exist. Thanks a lot.