Repairs, maintenance, mechanical issues, or drivetrain parts.

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2
votes
1answer
56 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
40 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 ...
1
vote
1answer
75 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 ...
0
votes
1answer
80 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
106 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).
4
votes
9answers
4k 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
110 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
72 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 ...
0
votes
1answer
44 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 ...
4
votes
1answer
181 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 ...
1
vote
3answers
344 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 ...
2
votes
2answers
117 views

I need to change my fork after having an accident with my bike

I need help as I need to change the fork for my bike (Ridgeback Speed 2013 Womens Hybrid Bike) I live in London and I went to few shops but in all of them they need to order the fork and it will cost ...
1
vote
1answer
2k views

Using a Sram 22 group with 10 speed crank

I have a SRAM Red 22 group set that has a standard crank (53/39), and I also own a SRAM Red 10 speed crank with compact chainrings. I'll be doing some climbing soon and would like to use the compact ...
0
votes
2answers
2k 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 ...
1
vote
2answers
203 views

Shimano Revo shifter does not shift [closed]

I have recently bought a new bicycle and the left Shimano Revo shifter (3 speed) is not shifting, what can I do?
24
votes
13answers
70k 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. ...
3
votes
1answer
169 views

Overhauled hubs: still some noise

I've just, for the first time, finished servicing the hubs on my bicycle. They are of the cup & cone type (Shimano). The cones of the front hub where pitted so I got them replaced, along with the ...
20
votes
4answers
113k views

How can I tell which size chain my bike uses?

After learning how to break a chain and reattach it, and also how to add and remove a master link, I find that I can now do much more in the way of maintenance at home. I'll no longer need to bring my ...
3
votes
3answers
2k 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
3answers
1k 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 ...
9
votes
2answers
9k 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 ...
1
vote
1answer
109 views

What advise for using spacers on MTB rear forkend

I have a Cannondale MTB frame I'd like to make a cruzer by adding a Sturmey Archer 2-speed kick shift. The SA axel length is 162mm and the spacing is 116mm but the Cannondale spacing is 135mm ...
0
votes
1answer
96 views

Chain doing noises… what to do?

I have a city bike with a 3 gear hub on the back. From some time now, from time to time I hear (I think) the chain clicking/cracking (noise) specially when going up a ramp. Initially I though it was ...
1
vote
2answers
398 views

What torque for caliper brakes onto carbon-alloy forks?

I've recently got a new bike with a Kinesis DC07 carbon/alloy fork. This comes with deep-drop calliper brakes (Shimano R451 Dual Pivot). The first time out I bumped one of the brakes and it twisted ...
1
vote
5answers
368 views

greasing closed bearings on the outside

Assume I have a couple of closed bearings on some pivots on my bicycle. These bearings: are fitted on a housing have an axle going through them are tightened by bolts which also have cups to ...
7
votes
4answers
2k 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 ...
8
votes
3answers
2k views

Why does my rear derailleur keep breaking?

I upgraded my rear-mech with a new cassette, chain and new cables a few weeks ago since then i've mangled two rear mechs! Both times I've just been riding along; not in a big gear; not at the ...
2
votes
1answer
205 views

Lubricating screw/braze-on threads: Bike lube or polylube?

Years ago, I made the newbie mistake of forcing a rack screw into a steel braze-on. I had to replace that fork. And I've heard this advice many times: When putting a screw into a braze-on, put a ...
6
votes
2answers
787 views

Approximately where is the center of mass of a mountain bike?

Take a "standard" multipurpose bike like this one: http://www.islabikes.co.uk/bike_pages/beinn29.html (Weighing 12.2kg) I'm conducting a physics investigation, and for this I need to know the ...
5
votes
1answer
1k views

How feasible is it to transfer modern (2010) components to a 90s frame (road bike)

My 2010 aluminum frame may be toast (stripped bottom bracket) and I was considering getting an older chro-mo frame and transferring the components to it. It's a racing/sport style with drop bars and ...
5
votes
3answers
2k views

Unscrewing a rounded allen bolt

I need to take out my rear shock but one of the 2 allen bolts that is holding it (the upper one) has been rounded. I've been told about various ways that such a bolt can be taken out including: ...
0
votes
1answer
196 views

Right campagolo gears slipping

I have a set of Campagolo Athena 11 levels and the right one is slipping when changing down. What is the problem and which part do I need to replace, please
2
votes
1answer
276 views

Brake response is spongey post-brake lever upgrade

I have just performed an upgrade of brake levers on my Plug Racer, from the original cross-style levers (top mounted, possibly Promax 239A models) to Cane Creek 200TT bar end levers, connecting them ...
7
votes
4answers
3k views

How to fix front gear taking 2 shifts just to move onto next cog

I was out on a ride yesterday and several times when I was changing up and down between big chain ring and little chain ring (I only have the 2 rings up front) it required 2 gear changes. The gears ...
13
votes
5answers
4k 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, ...
15
votes
2answers
2k views

Is there a practical gain from elliptical/oval chainrings?

I have seen competitive (amateur) cyclists with oval chainrings (front). What is the deal? Are they just for showing off, or is there a practical gain from it (different force transfer).
8
votes
3answers
5k views

Attaching a stem to a carbon steerer: how much torque?

So I decided to travel with my bike this week and to my surprise discovered that the steerer is carbon fiber. I had removed the stem from the steerer for packing but naively assumed it was aluminum ...
4
votes
7answers
4k views

What to use to clean a derailleur?

I'm not sure what type of solvent to use to clean a derailleur.
8
votes
4answers
2k 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
503 views

Good 9-speed cog configuration for touring and which low-cost quality cassettes?

Alert: this cassette conf cannot be used in all touring locations because of poor support. I use it only in 1st world countries. The largest cog at the back is about 12-14cm. The length from ...
5
votes
2answers
3k views

Fork lube. Should I use it? If so how often?

I ride a mountain bike with front suspension. I've recently seen fork lube for sale on an online retailer. This got me thinking. Do I need to be using fork lube? How does it help? If I bought some how ...
2
votes
3answers
14k 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 ...
6
votes
1answer
890 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 ...
8
votes
1answer
955 views

How often should I strip my bike down?

How often should I give my bike a full service? Strip the bottom bracket, clean and grease it. Strip the groupset and freewheel. And what products (or type of) should be used for each process? It's ...
4
votes
1answer
880 views

One stripped post mount on suspension fork

I have a suspension fork, which has a stripped lower post mount, i.e. the bolt used to attach the brake caliper doesn't grip the post. Before anyone asks - yes, it is the correct size bolt, as the ...
6
votes
4answers
2k views

Bent front sprocket

My chain just started to slip off my front gears and it happens within a minute of riding. I discovered that the middle sprocket is bent. This leads me to my questions: How much should a LBS charge ...
4
votes
1answer
612 views

Swapping STIs for barends — what issues are likely to arise?

I'm planning to swap shifters and brake levers from one bike to another. One bike is a randonee with STI brifters, and the other is a Surly Long Haul Trucker with barends and separate brake levers. ...
13
votes
4answers
15k views

How do I prevent the rear derailleur from slipping gears?

What's the best way to tune the rear derailleur of my bike to stop slipping gears? It seems that every time I re-adjust it, the middle/upper gears are perfectly aligned, but the lower gears never ...
4
votes
3answers
1k views

How to clean out the inside threads of a braze-on?

I'm installing a basket on my cruiser, and getting some of the allen screws into the fork braze-ons is rough going. It feels like there's dirt or grease inside the threads of the braze-ons. Forcing ...
4
votes
1answer
420 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 ...