Repairs, maintenance, mechanical issues, or drivetrain parts.

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5
votes
7answers
6k 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
606 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 ...
24
votes
4answers
182k 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 ...
4
votes
3answers
27k 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
8k 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 ...
8
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 ...
11
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
3k 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).
5
votes
1answer
1k 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 ...
11
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 ...
11
votes
2answers
20k 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 ...
7
votes
4answers
3k 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 ...
5
votes
1answer
914 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. ...
5
votes
2answers
632 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
2k 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 ...
16
votes
4answers
11k 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 ...
8
votes
3answers
3k 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 ...
9
votes
4answers
6k 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 ...
5
votes
2answers
700 views

Wald basket legs too short for cruiser — how can I install the basket?

I recently purchased a large handlebar basket, a Wald 139-WW for my cruiser, a Trek Pure. I'm having trouble installing the basket. Context: The basket attaches using hooks on the basket to the ...
6
votes
2answers
2k views

Is it possible to replace bearings in Shimano XT bottom bracket cups?

Curious if I can just replace the bearings in my existing cups or if I would need to buy new cups? If possible to replace them then what are possible high quality replacement bearings?
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 ...
27
votes
13answers
112k 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. ...
14
votes
5answers
8k 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, ...
13
votes
7answers
2k views

How do I fix a puncture?

I got a flat/puncture on my bike tube, how can I fix it myself without going to the nearest bike shop? What kind of equipment would I need?
15
votes
4answers
20k 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 ...