Repairs, maintenance, mechanical issues, or drivetrain parts.

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0
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2answers
112 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
82 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
101 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
2answers
134 views

When is a wheel considered true?

Generally speaking, how much runout can a bicycle wheel have and still be considered true?
1
vote
1answer
150 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
75 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.
1
vote
1answer
197 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
105 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 ...
0
votes
1answer
122 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
0
votes
2answers
48 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 ...
3
votes
2answers
106 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 ...
-1
votes
2answers
110 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).
0
votes
1answer
55 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 ...
2
votes
2answers
134 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 ...
4
votes
1answer
238 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
1answer
3k 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 ...
1
vote
3answers
464 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 ...
0
votes
2answers
3k 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
245 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?
1
vote
1answer
115 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
97 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
497 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 ...
3
votes
3answers
3k 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 ...
1
vote
5answers
498 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 ...
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 ...
2
votes
1answer
228 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 ...
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 ...
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 ...
6
votes
2answers
923 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
3k 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
235 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
297 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 ...
4
votes
7answers
5k views

What to use to clean a derailleur?

I'm not sure what type of solvent to use to clean a derailleur.
3
votes
1answer
530 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
4k 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 ...
21
votes
4answers
127k 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 ...
2
votes
3answers
16k 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 ...
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 ...
6
votes
1answer
923 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 ...
9
votes
1answer
1k 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 ...
16
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).
4
votes
1answer
977 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 ...
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
11k 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 ...
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
686 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. ...
4
votes
1answer
451 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 ...
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 ...
15
votes
4answers
5k views

How to tighten a brake?

This is probably a really basic question but I'm confused by the whole brake mechanism so... My left (front wheel) brake has to be pulled in really far before it actually starts to brake (I guess ...