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35 votes

Warranty on lock damaged during attempted theft

Warranties exist to protect you, the consumer, against defects in materials or workmanship, not against deliberate damage. The purpose of a bike lock is to help avoid your bike being stolen, so if it ...
Swifty's user avatar
  • 12.8k
23 votes

Stuck pedal, I've tried everything

I think your pedal is a lost cause. Even if you did get it off in the current condition, reinstalling and later removal will make later-you hate current-you. I would disassemble the pedal from the ...
Criggie's user avatar
  • 125k
22 votes
Accepted

Should I replace my bicycle tires if they have not been inflated in multiple years

If the bike has been hanging rather than sitting with weight on the tyres (and hence damaging the sidewalls), there is a good chance the tyres are still ok. You can check the tyres by going around ...
Andy P's user avatar
  • 18.3k
21 votes

Is it a good idea to buy second hand bike model that has been discontinued?

Generally it's absolutely fine to buy a relatively new bike, and not worry about component availability. Bicycles are not like cars that have specific components for each model, or at best some ...
Argenti Apparatus's user avatar
20 votes

Worth repairing?

To start off, the crank arm isn't breaking, it's quite definitely already broken. As to repairs - this bike seems to be what would commonly be called a 'BSO' (Bicycle shaped object). I definitely ...
Andy P's user avatar
  • 18.3k
17 votes

Warranty on lock damaged during attempted theft

Some locks offer "insurance" where you can get a payout if their lock fails to protect your bike. Of course there are caveats like "lock must be used" and "thief must leave lock behind" (for ...
Criggie's user avatar
  • 125k
13 votes

How to replace Avid BB7 brake pads in "new" calipers?

There is a trick: The pads need some "persuasion" to get past the spring clip. Here is a side view of the pads and the spring clip showing how the pads nest within the steel clip. This should make ...
Volga89's user avatar
  • 471
13 votes
Accepted

Threading Shimano chain, over or under lug?

Shimano seems to keep a lot of their documentation online, you can find your specific manual there. For example, the site gives this picture for DEORE XT RD-M8000 derailleur. Essentially, the ...
Ross's user avatar
  • 373
13 votes

Warranty on lock damaged during attempted theft

It still doesn't hurt to contact the manufacturer, but do not talk to as if they owe you anything. Do an open inquiry and see if there's anything they can do. Companies can actually do things out of ...
Nelson's user avatar
  • 231
13 votes
Accepted

Yes/no replace chainrings+cassette after chain failure?

Yes. The cassette teeth are clearly worn, and the large chainring teeth have worn into characteristic shark fin shape. If you use new chain with these, it will skip. The small chainring looks still ...
ojs's user avatar
  • 22.1k
12 votes

Broken stem tube – LBS "just" lowered handlebars. Is this safe?

Here's how I would fix the problem. This could all be done by somebody with basic tools and basic knowledge. Get a quill-threadless stem adapter and a new stem. This will allow you to fit the new ...
Kibbee's user avatar
  • 21.8k
12 votes

39-53t chainring on full suspension bike

The Giant Reign is a long travel 'enduro' bike that is designed to be ridden down steep technical trails, not pedalled down road/fire trail. It's most likely that changing to a 39-53 will not work as ...
Andy P's user avatar
  • 18.3k
12 votes

What is a substitute inner tube for 27x2.125" tyres (in Prague)?

Tl;dr: use 700c or 29" 27x2.125" is very rare. 27x2⅛" would be more likely, and wouldn't quite be the same thing, but for tubes the answer would be the same. Generally though, 27"...
Chris H's user avatar
  • 59.7k
11 votes

Worth repairing?

Your bike is a low-end entry level bike from the 2000's. If you want to fix it, good-new parts could add up quickly. So look around for one or more donor bikes of similar vintage and see what you ...
Criggie's user avatar
  • 125k
11 votes

Worth repairing?

Define "worth it." If you're wondering if it's financially worth it, the answer is probably not. It'll probably cost you as much or more to replace the parts that need to be replaced as it ...
jimchristie's user avatar
  • 11.9k
11 votes
Accepted

What is it called when a wheel has a long metal wall on its circumference?

That’s called a deep-section rim. The ones you have pictured are probably about 30 mm, but in extreme cases they can be 80 mm or so. You don’t need to worry about the brakes though. The brake track is ...
Adam Rice's user avatar
  • 30.1k
10 votes

Broken stem tube – LBS "just" lowered handlebars. Is this safe?

What you have now is a bit of a hack, but it could be good temporarily so long as you don't over-stress things somehow, and if you can tolerate the lower handlebar. (Note, I haven't seen how your ...
Daniel R Hicks's user avatar
10 votes

Reinforced Shimano pin snapped before connecting chain - how to resolve?

You can often use the chain tool to drive the half-way inserted pin back out from the chain. I do not think it is advisable to attempt pressing it in again. It is certainly possible, I did re-pressed ...
Grigory Rechistov's user avatar
10 votes

Stuck pedal, I've tried everything

I would try removing the crank and clamping the pedal in a bench vise. With the pedal pointed downward and held very firmly in the vise, you’d then try to turn the crank clockwise. Otherwise, the ...
Pisco's user avatar
  • 773
9 votes

Replacing the bike seat on my mid-1990s Trek mountain bike

tl;dr: Yes, you can pretty much buy any seat except some rare/expensive racing or classic leather seats. Explanation: As long as your seat attaches by two parallel rails that are 44mm apart (which is ...
RoboKaren's user avatar
  • 29.2k
9 votes
Accepted

Replace a 52/36 crankset with 50/34

You should not have to replace the entire crank-set. In general, a 'mid-compact' 52/36 crank will have a 110mm BCD spider, which allows 50 and 34 tooth rings to be installed. The Ultegra FC-R8000 ...
Argenti Apparatus's user avatar
9 votes

How to improve/restore vintage Peugeot bike, or is it even worth it?

This is often called "the slippery slope of knock-on upgrades" which can get expensive quickly. There are two simple and relatively cheap upgrades to try. Replace the brake pad inserts with modern ...
Criggie's user avatar
  • 125k
9 votes

How to improve/restore vintage Peugeot bike, or is it even worth it?

If you are planning to ride the bike, replace the handlebar stem
ojs's user avatar
  • 22.1k
9 votes

Should I replace my bicycle tires if they have not been inflated in multiple years

I agree with Andy P. If the tires are hanging, then I would check the side walls for cracks. If all is good, then I would inflate to see what happens! If they do take air I would get new tubes before ...
BrianN's user avatar
  • 143
9 votes

Should I replace my bicycle tires if they have not been inflated in multiple years

There are ways tires get damaged other than by having weight on them. For example, ozone and ultraviolet light can cause dry rot. If the tires were stored in a cool area, out of sunlight, and not ...
Andrew Henle's user avatar
  • 10.6k
9 votes
Accepted

Adjustable stem busted - Do I need to replace the whole stem?

I'd call that part garbage, sorry. You've overtightened it enough to tear apart the metal, and that toothed flange is probably custom. I would suggest replacing the whole unit with a different ...
Criggie's user avatar
  • 125k
9 votes

Stuck pedal, I've tried everything

I know this situation myself. The pedal shaft is hardened steel. It will win. Taking into account what you tried, expect the thread in the crank to be lost even if you get the pedal off, eventually. ...
Fred's user avatar
  • 221
9 votes

Do I need to remove this DT Swiss ring nut? (360 hub)

DT Swiss states that on pawl type rear hubs, the ring nut must be removed in order to remove the driver-side bearing. See section 2.7, page 9, in this manual from DT Swiss: https://www.dtswiss.com/pmt/...
MagnusK's user avatar
  • 846
9 votes

What is the inflatable thing inside a tyre called, and which one should I buy for a 42-622 tyre?

It's called an inner tube, and tubes cover a range of sizes that are usually printed on the packaging. There are 3 things you will need to know The valve type (presta/schrader/dunlop) The required ...
Andy P's user avatar
  • 18.3k
9 votes
Accepted

How do I find more reliable equipment for my Shimano CS-M4100, 11-42?

The M4100 is all steel, so I don't think you'll find more durable replacements. The first culprit in cassettes wear is, as you wrote, a lack of "hygiene" for the chain: a worn chain will ...
Rеnаud's user avatar
  • 20.6k

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