15 votes
Accepted

What are these red devices on Shimano Nexave v-brakes and how do they work?

The red part's purpose is to limit braking power by flexing when the rider pulls brake level too hard. They are claimed to improve safety by preventing accidentally locking the wheel, but in practice ...
ojs's user avatar
  • 22k
9 votes
Accepted

Ultegra R8000 rim brake compatible with Zipp 303 Firecrest?

For a wheel to be compatible, it needs to respect three criteria: Rim width (maximum width allowed is affected by brake shoes) Tire thickness Tire outer diameter For the BR-R8000 with carbon wheels, ...
olliebulle's user avatar
  • 4,141
7 votes
Accepted

How do barrel adjusters for v-brakes work?

Barrel adjusters push against the outer cable (cable housing). That's how they work both on gear and brake cables. The appropriate use of barrel adjusters on all cable brake systems, whether ...
Nik Kharlamov's user avatar
6 votes

Aluminium rim brake wheelsets

The wheelsets the initial question identified are all lower-cost aluminum wheels in the 30mm deep range. Moreover, the wheels originally listed are often OEM spec, and people often look to upgrade ...
Weiwen Ng's user avatar
  • 31k
6 votes
Accepted

Cantilever Brake Installation (can thick and thin cup washers be swapped?)

Yes, you can swap the thin and thick washers, in pairs. That means you do still need to keep a cup and a cone washer together. That is, a convex and a concave washer, and there still has to be a pair ...
Criggie's user avatar
  • 123k
6 votes

700c to 26in V-brake conversion

There are clamp-on V-brake mounts that could be added to your seatstays. My guess is that you would need to take a hacksaw to your existing brake mounts, as they would interfere with the brake arms. ...
Adam Rice's user avatar
  • 29.8k
6 votes

How do barrel adjusters for v-brakes work?

All barrel adjusters act like a piece of adjustable cable housing and effectively increase or reduce the cable length. As pointed out by Nik, they are only intended for fine adjustments. The big ...
Michael's user avatar
  • 26.8k
5 votes

Aluminium rim brake wheelsets

Personally, I would consider a rim-brake road bike as an "evolutionary dead-end", so the recommendation would be to not "upgrade" (by upgrade I mean replacing a working component ...
Renaud's user avatar
  • 18.9k
3 votes

Cantilever Brake Installation (can thick and thin cup washers be swapped?)

Yes, those washers are intended for swapping. The reason they're there is because of cantilever brakes having a variable mechanical advantage that depends on the exact frame / fork where you install ...
juhist's user avatar
  • 18.5k
3 votes

Ultegra R8000 rim brake compatible with Zipp 303 Firecrest?

This is an elaboration of a comment I made on olliebulle's answer. Shimano's carbon pads may not work optimally with other rims. That does not mean they won't work on other rims. Rather, rim ...
Weiwen Ng's user avatar
  • 31k
2 votes

Wide rims for rim brakes for gravel bike?

There are a handful of good options. A lot of what's out there in this category is heavy and more for hybrids, 29ers, and touring bikes. A 23mm internal width rim with a brake track basically means a ...
Nathan Knutson's user avatar
2 votes
Accepted

Shigura - Can i use a Shimano XT Lever on A Magura HS33 Hydraulic Rim Brakes

Maybe. Magura strongly suggests using their "Royal Blood" brake fluid, whereas Shimano specifies Mineral Oil. My understanding is that Magura's fluid is a variation of Mineral Oil but they'...
Criggie's user avatar
  • 123k
2 votes

How do barrel adjusters for v-brakes work?

The reason barrel adjusters with V brakes don't work well is that V brakes are long-pull brakes. This means a given pad motion requires more pull from the cable. Their cable pull is about 2.2 times as ...
juhist's user avatar
  • 18.5k
2 votes

Height-adjustable V-brakes?

I've never seen another v-brake set that does what Motolites do. What does exist for much less, though you'd need to change levers, is the old Tektro tri-align cantilever brake: I'm not 100% sure ...
Nathan Knutson's user avatar
1 vote

Very slight high spot in a rim affecting braking - can/should I do anything about it?

Next time you get the tyre off, check the inside of the rim at that point. If the rim wall is bowed out at that point but has a consistent thickness, this will be where the rim eventually fails. ...
Criggie's user avatar
  • 123k
1 vote

Aluminium rim brake wheelsets

I'm looking at upgrading the wheelset on my entry-level, rim brake road bike. I don't want to break my bank, so I'm looking into budget aluminium rim brake wheelsets. If you want good budget wheels, ...
juhist's user avatar
  • 18.5k

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