- Last numpty question of 2012….turning bikes upside down?
- The PinksterSubscriber
jekkyl – Member
It’s the most stupidest thing I’ve ever heard, if you removed the rear wheel you would have to rest the bike on the mech.
Or you could lie it on it’s side.
I’m my recent experience this is usually best done in the middle of the trail at a busy trail centre. 😉Posted 5 years agoRealManMember
British Cycling’s official recommendation* is to turn a bike upside down to remove the wheel, then lay it on it’s side (obviously the non drive side), whilst you fix the puncture, and then turn it back upside down to put the wheel back in.
But really what you should do is just go tubeless, and not puncture ever.Posted 5 years agopdwMember
I think it was this one:
triggered by a poll revealing that 2/3rds of people turn their bikes upside down to fix a puncture, a statistic so shocking that it prompted 8 pages of intense discussion.Posted 5 years agojekkylMember
so by not turning upside down you can avoid scratching/marking the brake levers and the saddle. To avoid this you lay it on it’s side potentially scratching/marking your brake levers and/or parts of the frame and/or marking/bending your rotors whilst also massively increasing the size of the ground you’re covering. This means there is larger potential that a cyclist/dog walker/numpty will ride/walk/stomp on your bike on their way past. Like I said the most stupidest thing I’ve ever heard 😀Posted 5 years agonachoMember
OK firstly I am no mechanic so don’t shoot me down as this is only what I have been told – but I have heard if you have Avid brakes (yes me too) that turning the bike upside down can cause a bubble in the air and therefore you have to bleed your brakes lots. (My mate had many problems with his avid’s and was told this maybe a factor)Posted 5 years ago
However I have exlixir r’s on my Heckler and it has spent lots of time upside down, including every time I get a puncture 😯coffeekingMember
I fall into the “don’t really care, I’ll do what makes life easiest” camp, but I have to say that I have sucked a bubble into my brakes (open system levers, lever pressed when bike upside down) and it also seems to affect my coil/oil damping in the very short term (first 30 seconds or so) so I don’t bother. That said:
It’s usually very easy to find and fix a puncture with the wheel still QR’d in place, since the invention of disc brakes.Posted 5 years ago
It’s perfectly possible to balance a bike right way up without damaging anything, using nature found all around you.
I don’t care what others choose to do, whatever works for them.
I dislike scratching my bike bits, especially expensive ones, for no reason. A crash is fine, but to scratch them through ham-fisted stupidity seems criminal – if I have to flip it, I’ll do it on grass/foliage.
OK firstly I am no mechanic so don’t shoot me down as this is only what I have been told – but I have heard if you have Avid brakes (yes me too) that turning the bike upside down can cause a bubble in the air and therefore you have to bleed your brakes lots. (My mate had many problems with his avid’s and was told this maybe a factor)
There’s a simple answer to that problem – don’t buy Avid brakes.
Fox forks (and maybe others) like being stored upside down btw.Posted 5 years agowatsontonyMember
i dont care what al says. if i am out and need to sort something and it would be easier for the bike to go upside down. then guess what, its going upside down. i have heard that it can cause brake problems but as i bleed my brakes regularly and throughly i have never had a problem!Posted 5 years ago
Crikey – how did I miss the original thread? Some serious pack hunting off poor njee on the original!! I am sure he survived though – (and whats wrong with washing mud off your tires (guilty again) and generally looking after you bike (even my basic one)?
I never realised that so much had been written about this!!Posted 5 years agocoffeekingMember
Surely this thing about an air bubble moving in the brake system only happens if your brakes haven’t been bled properly in the first place. If they have there shouldn’t be any air in there should there?
No, open systems use a non-sealed (hence the origin of the name I guess) reservoire of fluid to add fluid when wear occurs under atmospheric pressure. In it’s resting state the master cylinder (lever) is connected to the reservoire and in turn so is the hose. Upon pressing the lever the connection is closed and the line is pressurised. This means that you can have bled the system perfectly well but there will almost always be a small bubble in the reservoire that has the potential to float into the open line when the lever is inverted. Many designs try to stop this (hope use a small diaphragm to seperate the atmospheric pressure from the fluid itself) but often it’s nigh-on impossible to place the diaphragm without ANY air getting into the top of the fluid chamber. 99.9% of the time that’s fine and won’t be an issue, but extended period upside down increase the risk that the little tiny bubble might find your hose.Posted 5 years ago
I think you’re assuming bike brakes are closed systems, which very few are these days.
The topic ‘Last numpty question of 2012….turning bikes upside down?’ is closed to new replies.