15 votes
Accepted

Should the chain diverge that much?

Yes that's completely normal. You have one chainring and it has a fixed position. You have 11 gears on the rear, and only one of those could have "perfect chainline" All the rest are ...
Criggie's user avatar
  • 124k
7 votes
Accepted

Recommended wall thickness on rims with caliper brakes

Many wheels have wear indicators From documentation resources of Shimano's R5000 wheels: https://si.shimano.com/en/pdfs/si/4BG0B/SI-4BG0B-001-ENG.PDF The hollow on the opposite side to the valve ...
DoNuT's user avatar
  • 4,441
6 votes

Recommended wall thickness on rims with caliper brakes

Most newer rims have wear indicators. Either a groove around the rim, or a hollow at a specific point, like the example DoNuT mentioned. If those wear indicators can no longer be seen, the rim is at ...
Burki's user avatar
  • 1,510
5 votes

Which factors contribute to (rear) tyre wear?

Tyre Pressure With the same tyres run front and rear on road, I have the back 5-10psi (⅓-⅔ bar) harder than the front. That stops the rear wearing flat s badly, while helping with road buzz. Running ...
Chris H's user avatar
  • 58.9k
3 votes

Recommended wall thickness on rims with caliper brakes

Minimum: 1.5mm Here's a dead rim that failed in this way. Surprisingly, the tyre was fine and I still ride it. The inner tube has a massive ragged burst with lots of tentacles so was unpatchable. ...
Criggie's user avatar
  • 124k
3 votes
Accepted

Which factors contribute to (rear) tyre wear?

Conditions contribute to wear - riding in the wet of winter, with grit and sand will chew up the tyres faster than summer riding. Surface matters too, riding on loose stones and gravel eat tyres ...
Criggie's user avatar
  • 124k
3 votes

What are the failure modes of the brake rotor worn beyond limit

I will headline this answer by saying that RT-86 is special in that it is an Ice-tech rotor. This means that it is made of a 3-layer sandwich: steel braking surfaces with an aluminum core. In addition ...
MaplePanda's user avatar
  • 15.5k
2 votes

Are all 8-speed Shimano cassettes made from the same quality of steel? Hg200-8 vs Hg31, Hg41 and Hg51 durability

Probably not from same material, although I don't have reliable data for cassettes, only for chains. According to https://web.archive.org/*/https://www.cyclingtips.com/2019/12/the-best-bicycle-chain-...
juhist's user avatar
  • 18.7k
1 vote
Accepted

BB386 bottom bracket - Is this kind of bearing wear normal?

Bearings should last for longer. Shimano's basic BB bearings should last for some time. Some press-fit shell configurations are more problematic than others. For example, PF30 has pretty narrow ...
Weiwen Ng's user avatar
  • 31.5k
1 vote

Are all 8-speed Shimano cassettes made from the same quality of steel? Hg200-8 vs Hg31, Hg41 and Hg51 durability

This is an interesting question that may be hard to answer definitively without insider knowledge. Someone working for Shimano might be bound by non-disclosure agreements. In general, lower end chains ...
Weiwen Ng's user avatar
  • 31.5k
1 vote
Accepted

What are the failure modes of the brake rotor worn beyond limit

What are the failure modes of the brake rotors if you push them beyond limit? Thinner rotors will heat faster and could warp, leading to inefficient braking. Excessive heat and a warped rotor could ...
FreeMan's user avatar
  • 1,561
1 vote

What are the failure modes of the brake rotor worn beyond limit

Rotor wear is a thing that most riders don't really consider. From what I have read, the bets I got was "2 to 4 years for a typical rider" - whatever that means. Obvious conditions you ride,...
mattnz's user avatar
  • 50.5k

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