Repairs, maintenance, mechanical issues, or drivetrain parts.

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4
votes
4answers
30k views

Unable to shift to lower gears; Shimano 6 speed SIS rear deraillers

Presently I'm able to ride my bike only in 5th and 6th gears. I cannot turn the shifter (it's too tight) to move the chain to lower gears. The low stop-screw is all right and it was working till ...
1
vote
3answers
46 views

New Bike + Disc Brake Shuddering: Cause and Fix?

I recently bought a new bike (cx steel frame, carbon fork, disc brakes) that I am using as a commuter/all-rounder bike. My question is similar to questions that have already been asked concerning ...
1
vote
3answers
1k views

Theoretical question about double drivetrain (both-sides drive)

If one were to take a single-speed flip-flop hub, and fit two identical freewheels, and couple them to two identical chainrings (i.e. two drive-side cranks, one on each side of the bike), you would ...
3
votes
1answer
73 views

Freezing headset cups to ease installation - does this actually work?

Sometimes it can be a tight fit installing a headset cup / race. Bike forums are full of people saying putting the cup in the freezer helps installation based on their anecdotal, uncontrolled ...
28
votes
14answers
124k views

Creaking from cranks/spindle. How to fix?

Recently the cranks on my bike started to creak. I checked with my usual "bike-bible" Park Tool. They recommended dis-assemble, lubricate, re-assemble. So I did that. Remove cranks. Remove spindle. ...
1
vote
1answer
52 views

Loose pivot bushing inside the brake/shifter hood

I noticed a slight clicking noise and a resistance when squeezing the right (from the bicyclist's point of view) brake. Inside the hood, I can see a white rubber thingy (pivot bushing, thanks mikes) ...
5
votes
2answers
504 views

Fixing hydraulic disk brakes, what to check first?

I have a 10-year old bike, fitted with hydraulic disk brakes. The bike has been actively used for around 4 years only though. Recently, my brake levers started to have more and more "play" before the ...
0
votes
1answer
23 views

Campagnolo rear mech with Sram groupset

Is it possible to install a Campagnolo Record 11 speed mechanical rear derailleur on a bike that is otherwise equipped with a Sram Force 11 speed groupset? Has anyone ever used a similar setup and if ...
1
vote
2answers
59 views

Tektro Novela MD-M311 mechanical disc brake replacement [duplicate]

I have bought an electric mountain bike with Tektro Novela MD-M311 mechanical disc brakes and love the bike; however I find the brakes squeal quite badly, and I am looking at replacing the rotors and ...
6
votes
4answers
331 views

Reverse Gear in Bicycles

For an ordinary bicycle (neither fixed gear nor capable of changing any gears). Is it possible to modify it to have a reverse gear on it? (i.e. reverse pedaling causes the bicycle to go backward) (...
3
votes
1answer
226 views

Sachs- Huret derailleur (re)installation

Sachs - Huret derailleur installation So the learning curve continues on the '85 Peugeot P-16. The main lessons are to take pictures and time getting each thing done. I have the rear derailleur hung....
3
votes
3answers
291 views

My rear wheel isn't properly spinning. How can I tell whats wrong?

I'm just getting back into cycling after a long hiatus. My bike is a little old and worn and its got some issues. The biggest one is the rear wheel. My rear wheel spins, but it seems to be off center....
10
votes
5answers
4k views

How to fix new chain that switches gears when pedaling backwards

I just recently replaced a chain that got incredibly beat up in the winter (it was rusted, and practically stiff when I removed it.) I removed links from the new chain to match the length of the ...
3
votes
1answer
112 views

Disk brake rotor feels loose

Hey guys I've noticed my disk brake being "lose", I'm probably going to consult with LBS anyway but heres how I can describe it: the [rear] disk it self is not significantly more lose than the front ...
14
votes
5answers
9k views

Rear wheel slipping out under load

My commuting/cyclocross bike (a Surly Crosscheck) has a problem. If I tighten the quick release skewer to a normal level, sort of firm to close it, then if I step on the pedals hard at some point, ...
2
votes
2answers
114 views

Dutch Bike Winter Cleaning

I am asking this question as I ride a dutch bike (chain guard, mud flaps etc) so my chain is not directly impacted by salt on the roads. However, seeing that there is a lot of water splashing with a ...
5
votes
7answers
7k views

What to use to clean a derailleur?

I'm not sure what type of solvent to use to clean a derailleur.
5
votes
1answer
280 views

Back wheel started moving backwards when pedalling backwards

I have a 10 year old cheap 21 speed mountain bike that I have only ever done basic maintenance on (replacing inner tubes, tyres, brake pads, lubricating chain etc). I have just noticed that when I ...
5
votes
3answers
809 views

rear shifter lever gets stuck when shifting gears

All the shifting was working smoothly until my bike fell off to the ground (edit1: to my right side hitting the right side of the bike) with me couple days back. Now after about a week when I took my ...
12
votes
4answers
2k views

Will a bicycle trailer damage my (steel) bicycle?

I have a rhode gear trailer with a 100 lb capacity, similar to the burley and other brands, that attaches to the left chainstay (see image of hitch below). I currently have it attached to my heavy-...
2
votes
1answer
85 views

What are these parts?

It fell from the front hub/disc brake/fork area (most likely brake caliper) on my friend's bike which I'm servicing for the first time and I have no idea what they are!
2
votes
1answer
64 views

Columba folder w/mountain 10sp cassette & Sram X7 derailleur

On my bike the derailleur mounting bracket (hanger) is held by the hub axle and therefore fills some of the dropout slot on one side and pushes the axle lower in the slot on that side. So the axle is ...
0
votes
3answers
124 views

gears overshifting issue

As I have explained in my previous post here I have changed my rear shifter cable and housing. But I'm still having issues with shifting gears smoothly. It overshifts at particular gear combinations ...
5
votes
1answer
147 views

How do I get rid of weird rubbing noise on my cx bike?

Recently I got the Giant Revolt 3 and have been riding it for a few days now. I have lately noticed that there is some rubbing noise when I apply the brakes. If you look at this picture (might be a ...
5
votes
2answers
718 views

Busted Dept store Mongoose Shifter - Scrap or Fix

My wife convinced me that we should buy bikes (2x$100.00) @ a dept store. I found a Mongoose (which I can remember used to be decent) and within 6mos I broke the bracket that holds the shifter in ...
-1
votes
1answer
152 views

automatic gear shifting (slack chain) when reverse pedalling

I'm quite new to bikes. Thanks to youtube I fixed some of the shifting issues I had in the front derailer and now I can shift to all the gear combinations. But I found a something strange when I'm ...
5
votes
3answers
446 views

Derailleur Pulley Wheel Compatibility

I can't find replacement pulley wheels for my derailer that are explicitly made for it. Should I be safe replacing them with a set with the same number of teeth (i.e., the same diameter) and targeted ...
11
votes
2answers
24k views

How can I tell if a chain has a master link?

I need to remove the chain on my internal-hub cruiser to clean it (i.e., no rear or front deraileur), and I'd rather not remove my back wheel if I can avoid that. What do I look for to find the master ...
4
votes
3answers
487 views

How do I tune up the shifters/derailleurs on my mountain bike?

I have a Diamondback mountain bike with Shimano shifters that I bought used last summer, and over time the shifting has gone out of whack. For example, on the front wheel I can't shift into the ...
0
votes
3answers
14k views

What do I need to know about fitting new wheels on a bike?

My girlfriend has had the wheels stolen from her bike. I'd like to replace them, but we're working with a limited budget so I'm going to do the work myself and source the parts second hand. I've done ...
2
votes
2answers
795 views

Recessed brake pivot nut stuck in carbon fork

The recessed pivot nut for my front brake calliper (no. 4 in this diagram) has seized inside the fork. I've managed to remove the brake calliper itself by unscrewing it from the front, but the nut is ...
4
votes
3answers
3k views

Convert old road bike to comfortable commuter

I have an rather old road bike, that I'd like to convert to a comfortable commuting bike. The bike should be used for everyday commuting (< 5km) and occasionally day tours. I'd like to keep the old ...
10
votes
5answers
3k views

Why do current, entry-level shimano rear derailers have large-diameter pulleys?

I have seen (and recently bought) entry-level rear derailers from Shimano (Tourney for MTB, 2300 for road bike), and I keep wondering why they are making these parts with such large pulleys. I don't ...
5
votes
3answers
5k views

How to replace a Sturmey Archer's cable?

I would like to replace the cable of a Sturmey Archer hub, but can't find a way to disassemble the old cable without destroying it, and it puzzles me how to insert the new cable. To better explain, I ...
9
votes
1answer
1k views

When to replace wheel bearings

I just ripped apart my mom's mountain bike's rear hub. One of the bearings was incredibly rough, so I replaced it, and the other one was smooth, but didn't turn very easily. Since I didn't have a ...
2
votes
2answers
303 views

22 to 11 speed conversion?

I have a bike equipped with a SRAM 22 speed groupset (hydraulic) and was thinking about converting it to a 1x11. I like the simplicity of the 1x11 system and the potential weight savings from removal ...
1
vote
2answers
171 views

new MTB creacking on hard pedaling

When I press down hard on my right foot trying to go fast or up a hill I hear a noise coming from my bike. What is this? Its brand new... If it isn't an easy fix I will take it back. It only happens ...
0
votes
2answers
126 views

Sourcing Shimano Di2 6770 Parts

Can anyone tell me where I can source a Shimano Di2 Ultegra 6770 rear derailleur since shimano no longer has replacements and left their customers high and dry?
1
vote
3answers
2k views

When is a wheel considered true?

Generally speaking, how much runout can a bicycle wheel have and still be considered true?
0
votes
2answers
145 views

How to fix gears on a Kilimanjaro bike

I've just bought a Kilimanjaro bicycle for cheap. One reason it was cheap, I expect, was the gears system. It's only partly functional, and I don't understand why. I would go to the bike shop with it, ...
2
votes
2answers
168 views

Can I straighten bent rims between two flat surfaces?

I have some bent bicycle rims and would like to straighten them. I drew a basic scheme of what I want to do, the idea is to make a concrete plane mold as seen in the design to exert pressure on the ...
1
vote
1answer
2k views

Clicking noise coming from cog on fixed gear

Ever since I put my rear wheel on after taking it off, I have had this constant clicking noise from the cog. Here's what I know: It wasn't always like this. I rode for a few months with no ...
2
votes
1answer
112 views

What are the 'parts' to a mechanical disc brake set?

So there are rotors, pads, brake lever, brake cable...I just want to make sure that if i buy brakes I can get all the parts and I'm not missing anything.
0
votes
2answers
77 views

Trek T-900 Tandem rear hub

I have a Trek T-900 tandem that I bought used. It's probably about 12 or 13 years old. I'm having some rear hub issues with it, but I can't identify what hub it is. Trek's website and other ...
2
votes
1answer
636 views

What causes the rear hanger to snap off?

I have a Specialized Allez Elite road bike, purchased brand new in June this year. So far I've covered around 300 miles in total on it. During my ride yesterday, as I was going up a slight hill, I ...
-1
votes
2answers
137 views

How do I replace road brakes?

How do I remove my old (Shimano Sora) brake callipers (dual pivot) and replace them with new (Shimano 105 5800) callipers? (This is the bike if you want to know more components details).
7
votes
9answers
9k views

Is there such thing as a freewheel that doesn't click?

The clicking sound of the freewheel on my singlespeed when it's coasting is annoying for me, so I flipped over my back wheel and rode fixed for a few months in blissful silence. But having to pedal ...
0
votes
1answer
180 views

My Gears Are not Shifting Well

my gears are not shifting well. i can only shift from 1st to 2nd...i don't know what is the problem i have shimano revoshift gear enter image description here here are some images
3
votes
2answers
347 views

Derailleur hanger moves when tightening quick release

I have an old Trek T-900 tandem that my wife and I ride quite a bit. It's got an 8-speed rear setup. It's a standard (tandem) 145mm rear-spacing with matching hub, but tightening down the quick-...
0
votes
1answer
172 views

How do I replace road shift levers?

How do I remove my old (Shimano Sora) brake/gear levers and replace them with new (Shimano 105 5800) levers? (This is the bike if you want to know more components details). As a note, I'm asking ...