the 'there's no such thing as a stupid question' bike maintenance thread

In relation to shotgun

THE SHOTGUN SEAT WILL NOT FIT:

• Electric bikes (we do however have an e-mtb shotgun seat in development, subscribe to be notified of it's release in early 2021)
• Road or gravel bikes (due to the lack of clearance between the front wheel and down tube) 
• Cruiser or step-through bikes (due to the lack of clearance between the front wheel and down tube)
• Some older bikes (where the gear or brake cable runs along the top of the top tube, however cables that run elsewhere on the bike are fine)  

My chain keeps slipping off when sitting up from gear 6 to 7 to 8 and I'm not sure why. Pullies seen to be in line so I can't see what's going on. Shifting down gears Disney doesn't seem to cause any problems, just shifting up when I'm trying to pick up speed.

Any ideas folks?

8 is the smallest.

Sorry @Brian? not seeing a video there?

I think it might just be tension, it's slipping from 6 to 7 to 8, but not the other way, so I'd go to the barrel adjuster first

I haven't asked a stupid question in a while, so here I go.

I'm running cable to this front derailleur

The cable routing runs along the top tube...

...then down the seat tube to this plastic circle, where it loops around and comes up to the derailleur.

Now for the question. There doesn't seem to be anywhere for the cable housing to terminate, and I took no pictures of the original setup, because in my hubris I assumed I would be able to easily figure it out (in other words, a problem for future me, but future me is now present me)

Can anyone tell me what I'm missing, please?

It was funtional when the bike was in use 15 years ago. I don't think Ive lost parts, and just assumed there was some sort of cable stop. To my own great annoyance, I paid no attention when I was taking it apart, assuming it would be obvious, having done cables on other bikes before

Have to ask the silly question: I assume the clamp of the stand isn't hiding something?

With different brands of disc wheel sets will I need to reset the calliper each time I change out my racing wheels?

I've been saying this about cycle related stuff for ages. They do the same thing with lithium grease

Just for info - Brake fluid is hygroscopic which means it absorbs moisture from the air. I'm not sure what the recommendation is for bicycles but in motor vehicles it is generally recommended to replace brake fluid every two years as the absorbed moisture can possibly cause corrosion, rust, etc. of components.

So if you buy a litre and it lasts you years, it's possible that it may absorb moisture while you have the partially used fluid in storage.

I say this from an automotive perspective. I don't know what the recommended fluid change interval (if any) is for bicycles nor do I know what the potential is for corrosion as a result of aged brake fluid in a bicycle (that uses a much smaller volume than an automobile). But it might be worth checking before using an opened tin of brake fluid that has been left on the shelf for a long time.

As weepsie's link below points out, no system is completely sealed.

Having said that, at least with bikes, I'd be inclined to drain and refill the system only if you notice a drop in braking performance.

That's an excellent link and very informative - something every disc brake DIY cyclist should read.