Questions tagged [gears]

Gears in the drivetrain of a bike.

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Derailleur intermittent rubbing

So my front derailleur gets rubbed on by the chain when I give it a good push. If I have the bike up and just turning the crank or gently pedaling there is no rubbing, but if I put my weight into it I ...
AngryGoose's user avatar
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0 answers
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How to replace a band (hub, drum) brake with a freewheel

I am looking to convert my bicycle into a semi-electric bike by adding a freewheel. The 2 freewheels will allow me to use either pedals or an electric motor to move the bike. However, I don't have ...
user1314404's user avatar
3 votes
1 answer
134 views

How can I add an additional freewheel to the existing solid bicycle axle?

I want to convert my bicycle into an electric bike by adding a motor to it, allowing me to ride it using both pedals and the motor. I need to add a motor and a separate chain system, similar to the ...
user1314404's user avatar
4 votes
2 answers
798 views

Cannot figure out how to stop outer edge of front derailleur hitting chain

I have a Giant road bike with Shimano Ultegra gears. The outer side of the front derailleur is making contact with the chain, on both crank chain rings, when in the highest gear at the rear. I have ...
MeltingDog's user avatar
0 votes
1 answer
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My shifters are stuck in the negatives

So I recently bought my first bike. It worked great until winter hit. The gears stopped working and my girlfriend (who bikes way more that I do) said they so that when it gets really cold sometimes ...
Nils Marklund's user avatar
5 votes
4 answers
682 views

Chain drops when shifting up a gear at the front?

I've just gotten a new bike and run into a problem. When shifting from a smaller cog to a bigger one in the front gears, the chain consistently drops. The problem happens regardless of whether I'm on ...
SRJBike's user avatar
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-4 votes
2 answers
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Is the gear cycle a sham? [closed]

Why do I think (and based on my personal observation) that gears in cycles are no better? It just slows down the cycle speed. The effort needed to push the cycle is more in a gear cycle. Considering ...
Arun's user avatar
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3 votes
2 answers
109 views

Bike chain jumping at lowest and highest gear, fine in the middle

I changed out the shifter housing/cable because I felt some friction, and ever since it seems like I can't get the indexing right. If I set it to work well in the high gears, it doesn't work properly ...
user72590's user avatar
4 votes
4 answers
2k views

Is it possible to replace/regear the front cog? My easiest gear is too easy and I want to try for a higher resistance

I have a big-box-bicycle that I ride around the neighborhood regularly. After trying to master the highest gear setting I now find it easy on days where there isn't a breeze, and still manageable on ...
Sidney's user avatar
  • 347
0 votes
2 answers
127 views

My bike gears are not shifting and I want to manually get it to stay in 1st gear

My bike doesn't allow me to adjust my gears as it was too stiff. I loosened everything up with WD40 however it still didn't help and now I can't tense up my cable. Please can someone tell me how I ...
Dominicthedev's user avatar
2 votes
1 answer
104 views

Does this chain seem short? Does this photo indicate any obvious drivetrain issues?

Addition. Yes this is the large-large chainring. The shifting is rather poor but I have not tuned high, low and B, tension etc. Thank you I recently moved to a larger chainring. The shifting seems ...
Moishe Rokach's user avatar
2 votes
2 answers
91 views

Turbo Trainer Cassette vs Bike Gears

I’ve just purchased a Pinnacle Smart Trainer. In addition a 2nd hand Carerra bike. In my incompetence with anything practical, I’ve not read the instructions. The turbo requires a 8/9/10/11 speed ...
Chris's user avatar
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6 votes
5 answers
1k views

Training vs increasing gear ratio

I’ve just done a 1500km ultra cycling event, the lowest gear setup are front 30t back 40t. Along the journey there are many very long climbs that have more than 10% gradient. To conserve power I ...
Heykal's user avatar
  • 189
3 votes
4 answers
162 views

Chain rub on chainstay when in smallest front crank and highest gear

I've just bought my son a 2nd hand Orbea MX 27 (thought it was an MX40 but the groupset is consistent with the tech specs of the 2020 27). It was hardly used so doesn't appear to be age / mileage ...
Robert W's user avatar
1 vote
3 answers
194 views

Cracking noise coming from front gear when pushing on the pedals hard

Usually when the chain is on the biggest gear, whenever I push the pedals too hard, i hear a "cracking" sound from the front gear. I am not sure how to describe the sound, it sounds kinda ...
boomboom14's user avatar
2 votes
0 answers
133 views

Bicycle chain roller diameter size chart?

I'm digging for a while now, and can not find any helpful chart for chain roller diameters e.g. Shimano 8,9,10,11,12 speed. It differs of course depending on the manufacturer and the purpose. We know ...
guyfromthesun's user avatar
1 vote
1 answer
95 views

Can i replace just the brake on a bike that has a combined shifter/brake lever unit

i’ve just bought a new bike with shifter and brake units together on the handlebars. i want to replace the brakes with hydraulics from my last bike (new bike has cable brakes), however i don’t know if ...
Liam Duffell's user avatar
1 vote
1 answer
67 views

Gear won't change to bottom range if set for top and won't change to top range if set for bottom

Fit the following, all new drivetrain components to my Pinarelo that has Ultegra shifters: Tiagra 11t-34t cassette chain long cage derailleur derailleur hanger If I set it up such that the top gears ...
Michael Stubbs's user avatar
5 votes
1 answer
76 views

Bike cable tension not consistent when shifting up as compared to down

I'm trying to fix an issue on a (somewhat cheap) newer bike and it's giving me a bit of a run around. The issue is that when shifting up and down, the alignment is off. Normally, I could easily fix ...
Girro Affe's user avatar
-1 votes
2 answers
193 views

Broken gear shifter case. Is it safe to use?

My campag gear shifter is cracked in the plastic. I realised this when changing bar tape. It works perfectly and may be from a crash a few years ago. Is it still safe to use? Thanks for all opinions ...
Alastair's user avatar
10 votes
7 answers
4k views

Why do front gears become harder when the cassette becomes larger but opposite for the rear ones?

I noticed on mine and other road bikes that the "big" front gear becomes "harder" (more distance per revolution) when it switches to the bigger cassette. That makes sense, larger ...
Rohit Pandey's user avatar
0 votes
1 answer
100 views

Gear combinations for 3×7 Raleigh CHESTER 21 2022, frame size 50 cm

Continuing Which gears combinations shouldn't be used? and How do I know what gear combinations should work without chain rasp on front derailleur?, which are rather generic questions and answers, ...
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2 votes
2 answers
572 views

Shimano 105 - Shifter Internal Lever Broken

I've managed to snap an internal lever (it looks similar to the one on the right side in the pic) in my Shimano 105 (11-speed) right shift - think I just pushed it too far over and it snapped. I can't ...
Chano's user avatar
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4 votes
1 answer
201 views

choosing the right gear ratio

I am due to a new set of chain rings and chain on my bicycle (which I bought second hand). The current gear is: Front: 53/39 Rear: 11/28 I used to be a competitive racer wich made these gears also ...
Mech_Engineer's user avatar
1 vote
0 answers
435 views

Adjusting road bike to Wahoo Kickr: is this chain noise from cross-chaining, or do I need to index the gears?

I've got an 8-speed Mérida road bike (that is, 2x8, 2 front, 8 rear) that I'm fitting to a 2020 (v5) Kickr that I just bought new. I am learning about some bike mechanic stuff that despite many years ...
Cerulean's user avatar
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21 votes
7 answers
5k views

14 "Trashed" bikes acquired for free. Worth repairing and reselling? What do I look for?

Very new to this, bike repair specifically. I tried my best with the tags. I'm mechanically inclined, like to tinker, and have many tools (not bike specific). Learning and time aren't really an issue. ...
PlayfulShad0w's user avatar
1 vote
1 answer
203 views

My bike has a 10 speed cassette. MTX hub motor takes 9 speed cassette can I remove last cog of my cassette without issues?

I need some advice. I have a Giant Anthem 2012 dual suspension bike. And want to put a 1500 watt 26" MTX cassette type rear hub motor onto it. I believe the MTX wheel can take up to a 9-speed ...
Chris Jamieson's user avatar
6 votes
3 answers
907 views

Improve my hill climbing gear ratio on my Cannondale CAAD8

I own a Cannondale CAAD8 and absolutely love it. However it's not the greatest hill climber and I am considering on getting a bigger cassette to improve my ride experience on hills The current bike ...
p50runner's user avatar
7 votes
1 answer
1k views

Struggling to install Shimano CS-R8000 cassette

I'm replacing the cassette and chain on my Cannondale Synapse 2016 bike, and really struggling to understand where the spacers go on the cassette. No combination seems to work properly when changing ...
HTTP 410's user avatar
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5 votes
2 answers
734 views

SRAM 53/39 along with 10/33

Can I run my old SRAM cranks (53/39) along with new 12 speed Force axs 10/33 cassette or do I have to run new cranks too?
Mick's user avatar
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3 votes
3 answers
625 views

Alternative gear ratio newbie question: Am I doing a mistake for this commuter?

I have a commuter bike using a 3x9 MTB transmission: HG61 9 speed 11-32T: 11 / 12 / 14 / 16 / 18 / 21 / 24 / 28 / 32 Deore XT crankset (104MM) 22 / 32 / 44. I mostly use the 32-tooth middle ...
tweedi's user avatar
  • 587
5 votes
2 answers
1k views

Can I run 11-32t on my Bike and 11-28t on my smart trainer using the same bike?

I run an 11-32t on my rear wheel and completely forgot to check the specs of the 11-speed cassette I ordered for my smart trainer. Turns out the one I got for the trainer was 11-28t. Can I run the ...
Charlie's user avatar
  • 53
1 vote
2 answers
132 views

Re-insert Gear Cable Plug / Fitting

My front derailleur wouldn't let me shift to the small chain ring, and after some investigation I located the issue to this plastic plug/fitting/thingy that seems to have popped out of the little hole ...
nathfn's user avatar
  • 121
6 votes
3 answers
463 views

Vertical Dropout Derailleur Hanger for a bike that did not come with gears?

I have a bike that did not come with gears. It is a rear hub driven ebike with a single speed. Eventually when the warranty runs out, I want to put gears in it and turn it to a mid drive. Now I know ...
badcircle's user avatar
1 vote
1 answer
35 views

Can this Sunrace standard gear hanger be used with a quick release axle?

Can I use a Sunrace standard gear hanger with a quick release axle? The current axle does not protrude enough to extend into the area shown on the picture below which overlaps the frame (and looks ...
Andrew Welch's user avatar
  • 2,954
1 vote
1 answer
903 views

How to change gears on Triban road bike

So, I recently bought this bike: https://www.decathlon.co.uk/p/road-bike-triban-rc-120-grey/_/R-p-308062 At the front are two cogs, small and large. I did say I was a newbie!!! At the back are 8 cogs, ...
pee2pee's user avatar
  • 111
2 votes
2 answers
100 views

Freewheel/gear slipping

I have a new bike which is roughly 6 months old and has not been used much. I've ridden roughly 120 miles on it and the gears or freewheel has started slipping when I'm in the lowest gear while ...
Adam's user avatar
  • 21
2 votes
1 answer
186 views

Shimano 7 speed shifter with 9 speed drivetrain

Can I use a Shimano Alivio 7 speed shifter with Shimano Deore 9 speed drivetrain? Basically the bike originally came with everything being set up for 7 speed. Somebody switched out my tire/rim and ...
Phil's user avatar
  • 21
6 votes
1 answer
1k views

Loud clunk moving to smallest sprocket

When I shift gears to the smallest sprocket it makes a very loud clunk sound. There's also a lot of movement in the chain, like a bounce. I've taken a video demonstrating this Video of clunk I'm ...
nblackburn's user avatar
3 votes
4 answers
2k views

7 or 8 speed cassette?

I'm riding a Schwinn GTX 2 and using it to learn things on. I am new to fixing newer bikes. I've changed to Altus front and rear derailleurs. Now I'm about to put on a gearset of the same. I've got ...
Dougan Pierce's user avatar
1 vote
1 answer
188 views

Should I get 7 or 21 speeds for city commute?

I'm 5'10" 95kgs and am looking to buy a hybrid cycle for exercise. Have never ridden a geared bicycle before and was wondering if I should go with 7 or 21 gears. My commute would be within city ...
pb_ng's user avatar
  • 133
1 vote
1 answer
845 views

Shimano nexus 3-speed hub gear, yellow dot does not move when adjusting

I have a bike with a Nexus 3 hub gear. Yesterday the shifting got out of whack, when set to gear 2, it was actually in gear 1, gear 3 was 2, and so on. I looked up how to adjust it, and found that I ...
GrixM's user avatar
  • 137
2 votes
2 answers
403 views

New shifters for MTB to Gravel Bike (Deore M4120)

I have a MTB with DEORE RD-M4120 as the rear mech, and am currently running 10 speed, and am looking at converting this into a gravel bike. I want to put drop handlebars onto this new build, and was ...
Isaac's user avatar
  • 21
2 votes
2 answers
584 views

How much bend can I have on a gear cable before shifting performance is affected?

I have a Sunrace m2t derailleur on an old Batavus holiday dutch bike and I am running the gear cable from the derailleur down the chain stay under the bb and up the down tube. The bend on the gear ...
Andrew Welch's user avatar
  • 2,954
4 votes
1 answer
220 views

What is the best way to increase gear inches on an old bike?

I only recently got into bicycling and without knowing anything, I bought a bike from a local used bike distributor. Here's what I've learned about the bike. The frame, seat, and handles are original ...
Nathan Roberts's user avatar
5 votes
4 answers
1k views

Are there single speed electric bikes already?

Let's see how far the trend of motorcycle-disguised-as-bicycle is at. Electric drive is penetrating most market segments. The front derailleur is dead. I believe all types of electric motors have an ...
Vorac's user avatar
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0 votes
1 answer
145 views

What happened to the rear gear? [closed]

I commute to work every day, 6km round trip. Everything was fine for many days. Yesterday, I (believe successfully) switched from 2x2 to 3x7 in order to make some more intense training. I start ...
George Menoutis's user avatar
0 votes
3 answers
2k views

Upgrading Gear Train, Brakes, Tires — Cannondale Topstone 4

I just purchased a Cannondale Topstone 4. To be honest, the bike fits me better than any bike I have ever purchased and I feel good riding it. I do, however, have a few issues for which I would like ...
Anil Rao's user avatar
  • 289
1 vote
1 answer
1k views

Can a gear shifter be replaced?

So I have a geared cycle from Rayleigh. While cycling I fell off, and the gear shifter for front gear broke off with the brake handle. It was brand new cycle barely month old. and I didn't expect the ...
Kshitij Kumar's user avatar
3 votes
1 answer
855 views

What else do I need to change if I upgrade my Sora groupset?

I have a Specialized Allez 2019 or 2020 with Sora groupset, but the crankset is Praxis 50/32, and the brakes are Axis. I changed the rear derailleur to a RD 5700 and I'm looking forward to upgrading ...
Matthew's user avatar
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