Questions tagged [gears]

Gears in the drivetrain of a bike.

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1answer
25 views

Replacement parts for old Giant CRS 4.0

I'm looking at replacing the cassette and chainrings on an old Giant CRS 4.0 bought way back in around 2009 (I think) and trying to find compatible (and still available) parts. Its parts are listed as ...
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3answers
524 views

Problem with Apollo Gradient clunky and missed gear changes

About four months ago I decided to get back into riding. I bought an Apollo Gradient mountain bike. I know this is quite a cheap/basic bike but didn't want to spend a lot if I didn't stick with it. I ...
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2answers
118 views

Gears rattling in the back [closed]

My MTB is making weird rattling noises in the rear. What could be wrong? I'm in Australia and my bike has sram components. Picture:
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1answer
60 views

My bike is slipping only in highest gear

I used to ride my bike in highest gear all the time, even uphill, and didn't shift down unless i absolutely needed to. Then my highest gear started slipping on uphill and even on straight road if i ...
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4answers
309 views

What is the best gear combo for me on road bike?

I've got a 2011 Specialized Secteur Elite with basic sram apex groupset. It has the following specs: 10 speed 11-34t cassette SRAM APEX 50/34t chainwheel SRAM APEX Currently running 700c with 25m ...
4
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4answers
523 views

Internal Gear Hub Nexus 7

I just bought a new bike and it has the nexus 7 internal hub. This is my first internal hub. I love to ride but admittedly don't know much about the mechanics of bikes. I'm 57 and mostly ride the bike ...
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3answers
1k views

Does new chainring require change of other parts?

I'm thinking about changing my 2nd chanring to a smaller one (2 chanring setup). I hear most people recommend to change the chain when changing the cassette. Hence my question: should I expect to ...
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0answers
39 views

Why does my Shimano Nexus 8i need readjustment after every gear shift?

Since a month or two, almost every time I change gear my Shimano Nexus 8i becomes "unadjusted". I have readjusted it dozens of time but the problem persists. The gear is really easy to ...
0
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1answer
58 views

Looking to change from Octalink Claris to Shimano 105, will the frame be compatible with a 105 hub?

Since road bikes are sold out almost everywhere. I was thinking about upgrading my current road bike with a new group set. My current bike a Scott Speedster 50 (2015) currently has a Shimano Claris ...
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2answers
389 views

Upgrading gears from microshift to Shimano

I have a Firestorm 29D (3 * 8 gears, 24 total) bike. The shifting is not smooth at all. I would like to upgrade my rear derailer and shifters or groupset to Shimano altus or any other. Kindly suggest ...
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3answers
145 views

How to calculate gear range mean step?

On this wikipedia article, all the mean steps in the gearing range chart appear to be wrong, but my guess is that I am misinterpreting something: https://en.wikipedia.org/wiki/Bicycle_gearing 180%/3 !=...
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2answers
199 views

Internal friction in new Alfine 11 S7001-11

I just bought a new rear wheel with an Alfine S7001-11 internal-gear hub. Before installing it, I realized that it apparently has heavy internal friction. When the wheel is set in motion, it comes to ...
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0answers
69 views

Make a broken gear bike a fixie

Hi sadly my gear is broken. Now my idea was to remove the gear and shorten the bicycle chain to make the bike a fixie. It's a bike with 7 gears at the back wheel and no gear at the front. What do you ...
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3answers
1k views

Chain slipping on smallest cogs (bigger chainring, new chain)

I recently switched my SRAM 1x12 Eagle SX drivetrain from a 30 to 34 direct mount Chainring. I also bought a new chain to accompany with it. Chain length was measured as the sram service manual ...
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0answers
112 views

Slight crackling sensation apparently due to the chain sticking to the cassette teeth

I've just assembled my bike, so it has hardly been ridden (less than 200km) and all the components are new. Everything works perfectly, except an unpleasant very slight crackling sensation when I ...
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3answers
274 views

Can I 'upgrade' a 9 speed Tiagra RD to Sora to lower my gears?

My girlfriend has an oldish Cannondale CAAD8 bike with Tiagra 9 speed triple. The rear derailleur is the RD-4500 GS with a 12-26 cassette. The front is a 50-39-30. She'd like to get a lower bottom ...
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2answers
128 views

Broken Sturmey-Archer dual cable 5-speed shifter

I have this Sturmey-Archer shifter which controls a hub with 5 speeds with cables on both sides of the hub. These 5 speed with 2 cable shifters are very hard to find and my shifter broke as the ...
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6answers
6k 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 ...
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4answers
46k views

Best bicycle for a moderate to extremely hilly suburbs?

I've moved to an area that's notoriously hilly. I had gained a lot of weight but managed to ride it off by cycling in a well built but extremely faulty and wastefully heavy chinese bike. The gears ...
13
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5answers
3k views

Why are bicycle gear ratios computed as front/rear and not the opposite?

I recently realized that when people talk about bicycle gear ratios, it's calculated as number of teeth on the (front) chainring divided by the number of teeth on the (rear) sprocket/cog. This made me ...
4
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2answers
290 views

Chain hitting front derailleur cage with H limit screw fully loosened

I followed the Park Tools guide to set up my gears. The rear derailleur was a success but I can't manage to adjust the front derailleur so that the chain stops grinding on the guard. There's no more ...
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3answers
108 views

Rear derailleur doesn't go to smallest cog

I'm sure it is a simple fix to this, but please bear with me. I have recently swapped my rear wheel on my bike (with an identical one, keeping the same cassette). Upon putting it back in, I noticed ...
6
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4answers
491 views

Swapping wheels and cassettes with Shimano GRX 600/800

I am in the market for a gravel bike. I plan on getting a second set of wheels for road rides. This bike will most likely have Shimano GRX 600 or 800 2x and an 11-34 cassette. Assuming the rear ...
2
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2answers
444 views

how can you index a 9 speed 11-46 tooth cassette if the gears arent equally apart

I am looking at purchasing a 9 speed 11-46 cassette but on inspection the bigger cogs are not equally apart from the smaller ones. How would you go on with indexing (I use a thumb shifter 9 speed) if ...
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2answers
1k views

Do I need a chain breaker tool to install a new chain on my bicycle?

Do I need a tool, or will the chain have the correct length? For example, my biggest cog in the rear is 34T and the biggest chainring at the front is 42T and the chain has 116 links. Is a chain with ...
3
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2answers
536 views

How to maintain a Shimano Nexus gear hub?

I have a bicycle with Shimano hub gears (Nexus 7 speed). I would like to know what type of maintenance it needs, besides the normal tuning. I believe it needs some greasing, but I have no idea how to ...
4
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5answers
3k views

Replacing rear solid axle with skewer

Hoping someone can advise. I recently ordered a Saris Fluid2 trainer, which requires me to use a special quick release skewer on the rear wheel.  However, my regular road bike is an old Acapulco ...
4
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3answers
6k views

What's the shortest / easiest “granny gear” available?

What's the range on granny gears - the innermost, smallest front chainring?
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1answer
201 views

Gears reversed (1<->7) after replacing back tire. Why?

Gears reversed (1<->7) on the back disk after replacing back tire. Why? Here are pictures starting with 2nd gear then going to 6th but the shift is actually reversed: https://photos.app.goo.gl/...
9
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8answers
30k 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 ...
3
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5answers
988 views

Does crank length affect the number of gears a bicycle needs?

When I was a child I noticed that as I out-grew my bike (or when I rode a smaller child's bike) I felt like I could accelerate better. The smaller bike seemed 'nippier', and in hindsight it was ...
4
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2answers
898 views

Can you run 52/39 chain rings with an 11/32 cassette?

Seems most bikes either come with 50/36 rings and an 11/32 or 52/39 rings with an 11/28 cassette. I live in hilly terrain and do need lower gears but often feel spun out with my 50/36 by 11/32, could ...
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2answers
38 views

Change gear cables for Shimano Tiagra 4603

Can't seem to figure out the way to enter the cable shifter which broke while riding!!! Can't also find a manual or video out there helping me to replace it.
1
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0answers
185 views

which motor is used to change gears in automatic gear shifting cycle now-a-days?

I am doing a project on automatic gear shifting. I need to choose which motor will be used to change the gear. I have found a previous question on this topic. An answer mentioned: If you used a ...
0
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2answers
383 views

11t-40t/42t cassette on 3x9 system

I need your help about gear ratio. I am currently riding 3x9 drivetrain, Deore m592 rear (SGS-Shadow), Deore XT m770 front. My gear ratio is: 11t-32t (rear) and 22t-34t-44t (front). My local hills and ...
0
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1answer
91 views

Reinstall a Shimano nexus 7 wheel after puncture?

I took my back wheel off to fix the tube. When trying to put back together the "gear cassette" I was struggling, it just wouldn’t fit. I eventually checked a youtube video that explains how ...
3
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2answers
228 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?
3
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1answer
124 views

Bike with coaster brake and gears for teenager with disabilities

I have a 13 year old with a form of muscular dystrophy. He's well physically, though not as strong as most kids, and can ride a bike. We got him a cruiser bike, which I then modified to make ...
8
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3answers
1k views

Convert single speed, steel framed, vintage track bike to geared

Is there any way to convert a steel framed single speed vintage track bike to a geared bike? I have a track bike with only the rails for the wheel but I've moved out of the city and there are more ...
1
vote
2answers
116 views

Convert track bike to geared

Is there any way to convert a track bike to a geared bike? I have a track bike with only the rails for the wheel but I've moved out of the city and there are more hills where I am now living so would ...
0
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0answers
23 views

Convert track bike to geared [duplicate]

Is there any way to convert a track bike to a geared bike? I have a track bike with only the rails for the wheel but I've moved out of the city and there are more hills where I am now living so would ...
3
votes
2answers
116 views

One of the cogs on my freewheel is bent and I have an assumption of how it happened

I was riding up a steep road when I shifted to a lower gear and I was pushing really hard on the pedals. Then I checked my freewheel, one the cogs was slightly bent I don't know if it got bent because ...
3
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2answers
647 views

Need help understanding my grip shifters on my handle bar

I am new to mountain bikes and recently bought the Apollo Phaze bike. I was wondering if anyone can help me understand the functions of these gears and when to shift them. For example, when commuting ...
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2answers
73 views

Difference between a 7 speed chain and a 10 speed chain

I have already upgraded to a 10 speed casette from a 7 speed freewheel. I was wondering if a 10 speed chain is narrower than a 7 speed?
5
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2answers
2k views

Rear cassette replace 11-30 with 11-32, or 11-28?

I have an 11 speed 11-30 rear cassette that I would like to replace but cannot seem to find an 11-30 anywhere. Can I safely replace this with an 11-28 or an 11-32 without replacing my rear derailleur?...
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3answers
2k views

How can I lower the gear ratio on my son's bike?

I got a SH Commencal 24" MTB for my son. He loves it - except on climbing steep slopes where he runs out of steam. It comes with a 7-speed 14-28T freewheel (Shimano MF TZ21) + Acera derailleur, ...
0
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1answer
94 views

Triple Chainset

Trying to replace my 52/42/32 front 21 speed chainset with same. The outer chain ring 104bcd 52t would also be OK. Unable to find. This is for an English trike.
0
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1answer
159 views

Best solution for 2x8 index shifting [closed]

I've been riding a pretty well-tuned frankenbike (I call it the argos, I've had it for 15 years) set up with claris 2x8 shifters (r2400) and dura ace (7700) derailleur on the back with an old ultegra ...
3
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3answers
2k views

How does one upgrade a bicycle?

I am a total bike novice, I can ride them but have never done much as far as maintenance. Recently, I got my old bike out of storage, it is a 1991 Trek Multitrack 700, and I want to know if I can "...
4
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5answers
2k 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 ...

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