22mm x 16g steel tube

[mick70Participant @mick70]

anyone know a supplier?

tried local places but what they list 22mm is actually 7/8 now i know 0.2mm ish

shouldn't matter but it does as for some custom length goose necks on bikes i'm building.

if still had lathe set up would have gone for 14g and skimmed down but not an option.

only other option is go for 14g and sand length using flap disc on grinder and marker pen.

done it before and got good results but if idea works will need to make 50.

[mick70Participant @mick70]

[JasonBModerator @jasonb]

Is 22mm plumbing pipe going to be too thin a wall?

[mick70Participant @mick70]

might be bit thin but neighbours dad is plumber so will see if he as an offcut i can try ta

[Brian WoodParticipant @brianwood45127]

Surely you will need steel tube for bike frames? The plumber will only have copper pipe.

Have you tried metals4u? Their website may have what you need.

Brian

[JasonBModerator @jasonb]

Opps I read it as wanting copper

[Martin ConnellyParticipant @martinconnelly55370]

I think metric tube will be sold with a metric wall thickness. Are you searching for something that does not exist? A quick search on Ebay for 22mm steel tube gave plenty of results with a 2mm wall for instance.

Martin C

[Michael ToppingParticipant @michaeltopping17870]

I'm a bit of a cyclist and I have to say that Mild steel is not suited to any part of a bike frame. Have a look at the Reynolds tubing web site they have been around for over 100 years making bike tube sets.

Ordinary mild steel will absorb most of the pedalling effort, not transfer it to the rear wheel. I had a bike once made of low grade aluminium tube and that had exactly the same problem, soon got rid of it.

Michael

[JonParticipant @jon]

This can be a long drawn out affair, size is a nominal dimension within tolerances of the Standards governing body.

In the past i have had to buy say short lengths from several suppliers. Sizes vary so buy from same supplier what you need.

Worlds your oyster here.
https://www.steeltube.sk/list-of-dimensional-standards/

I would never advise anyone going to these metal markets the cost is always outrageous and have to collect. Can get three times more for same outlay with delivery from most online places, why bother.

ERW, Cold and hot rolled tube wont be round, certainly offset to the bore.

[mick70Participant @mick70]

martin have sent email to someone on ebay asking for od cheers.

can sand down .2 off 2mm ta.

michael i have built about 40 bikes from steel from recumbants to american style choppers with car back wheels for my kids with no problems.

my first tadpole style recumbant i built 6 yrs ago is still in every day use by friend i passed it onto and ridden to work 8miles every day by him.

i don't know about your normal bikes these days as haven't ridden one years.

[not done it yetParticipant @notdoneityet]

Are these bikes or trikes?

[mick70Participant @mick70]

it's two of these i'm building for mate's who need steering altering to suit their disabilites.

normally would weld to std gooseneck but can't this time for way i have to modify steering.

so have to scratchbuild.

[Ian S CParticipant @iansc]

How about old bike frames.

Ian S C

[mick70Participant @mick70]

cut load up for parts for building them but no tubing that will fit into headstock.

guy i'm building one for as no use of left left so will have steering and crank between legs.

loosely based on one in pic below.

[Martin ConnellyParticipant @martinconnelly55370]

Mick70, just make sure you get seamless tube not erw (electric resistance welded).

Martin C

[Tim StevensParticipant @timstevens64731]

The sentence from Michael Topping 'Ordinary mild steel will absorb most of the pedalling effort, not transfer it to the rear wheel' seems not to fit comfortably with my understanding of the properties of mild or any other steel. What else does the energy put in do? Or, which bits get hot? An effort on a pedal will cause the metal – any metal – to spring, and if the effort is too great, it will take a permanent set. Otherwise the spring effect of mild steel is no different from fancy grades of steel – the relevant Young's Modulus is almost exactly the same for all steel.

So, does this mean that a pedal effort on mild steel is enough to bend it permanently? Or what is going on with mild that does not happen with Reynolds ?

Confused of mid Wales – ie Tim

[Paul LousickParticipant @paullousick59116]

I could not find anything on the Reynolds web site saying "Ordinary mild steel will absorb most of the pedalling effort, not transfer it to the rear wheel". (I am interested to see what they say, please advise address).

Reynolds sell tube sets in different materials, including steel. The main advantage in using other materials is weight and unless you are out to break world records is not required. Building from exotic materials would also require specialised equipment for fabrication.

Also confused of New South Wales, ie Paul

[Michael GilliganParticipant @michaelgilligan61133]

Tim & Paul

I think this is a reasonably well-balanced article on the subject: **LINK**

http://www.bretonbikes.com/homepage/cycling-article-blog/163-steel-tubing-for-cycle-tourists

MichaelG.

[David George 1Participant @davidgeorge1]

Have you asked Reynolds them selves for help, I know that they have helped groups in the past with donations of tube. They are based at Hall Green Birmingham contact details on there web site.

David

[Paul LousickParticipant @paullousick59116]

Thanks Michael,

I understand all of what is in the link. All basic engineering and common to lots of construction ( have worked in mechanical engineering for 30 years) but what we do not understand is the statement that "Ordinary mild steel will absorb most of the pedalling effort, not transfer it to the rear wheel".

Paul

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Paul Lousick on 06/07/2018 08:16:45:

Thanks Michael,

I understand all of what is in the link. All basic engineering and common to lots of construction ( have worked in mechanical engineering for 30 years) but what we do not understand is the statement that "Ordinary mild steel will absorb most of the pedalling effort, not transfer it to the rear wheel".

Paul

.

I think it's probably best to put that exaggeration down to 'poetic licence' Paul

MichaelG.

.

Edit: This is worth a look, regarding 'energy absorption'

https://www.sheldonbrown.com/rinard/fea.htm

Edited By Michael Gilligan on 06/07/2018 08:43:04

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