Longtail Bicycle Build 02 - Tubes and Full Size Drawing (cargo bicycle)

[@michelevitarelli]

Bravo. those parts cleaned up nice.

[@PithyBikes]

:D

[@zachalves7143]

Really great video. Your attention to detail is amazing.

[@PithyBikes]

(•̀o•́)ง

[@fajrulfalah4852]

your channel is very inspiring for me. keep it up

[@PithyBikes]

+fajrul falah inspiration goes both ways :) thanks for watching!

[@keepgate]

thanks for another great video.keep them coming!

[@PithyBikes]

+keepgate my pleasure! Will do :D

[@jeffhsiao3106]

Surface prepping disks works very nicely when it comes to removing paint.

[@PithyBikes]

You guys know all the tricks! :)

[@lightavi]

NB If you strip a tube with a wire brush mounted on a machine, you will have to sand always the tube because the wirebrush polishes the tube and the paint will not adhere correctly to the metal surface . regards Bart

[@PithyBikes]

Hey Bart, Great tip!! I'll have to sand that tube then :)

[@aspenbanjo]

Steve, I've had good success with welding the butted (thick wall) end of the ST to the BB shell

[@PithyBikes]

ooh, I think for this tube that might not be an option because the ID is different on both sides. The thicker wall side ID fits the seat post well. I'll have to check again but I think that's how it measures..

[@aspenbanjo]

i buy my ST's to fit the seat post on the non butted end

[@PithyBikes]

Sweet. Where do you source your tubes if you don't mind me asking? :)

[@aspenbanjo]

henry james

[@aspenbanjo]

henry james

[@Wezly]

Awesome videos, really inspiring. I want to learn to weld now!

[@PithyBikes]

Find a class if you can. I took one in Oakland CA at a place called The Crucible. After that class I was hooked (obviously) haha.

[@jesscneal]

You could take a full size PDF to an engineering firm or blueprint shop and get your frame CAD plotted. A blueprint shop would have 42" wide rolls of paper in their wide format machines. I mentioned this on the last vid but not sure if you saw the comment or not cuz it was buried a bit. Looking forward to more :)

[@PithyBikes]

+Jess Neal I saw that yes. It's a great idea! Huge time saver (and back saver) 😭

[@luisricardojaviernunezzamb8352]

Just Amaaaazing!!!

[@ComiXDude]

love the video, what kind of steel are you using ?

[@breth8159]

nice stuff thinking about building one myself

[@michelevitarelli]

try the other type of wire wheel (the one you are using is intended for flat surfaces.) also you can chuck up a wire wheel to you bench grinder. that's a little safer and easier to control.

[@PithyBikes]

Nice! TY!

[@Steelcrafted]

Have you thought about taking the bike cad drawing and scaling up to life size and sending it to kinkos?

[@PithyBikes]

+Nathan Hamler this is a really good idea. I will do this next time! 🙌

[@BikecadCa]

I also recommend this. You don't even have to scale up the BikeCAD drawing. BikeCAD drawings are already full scale by default. www.bikecad.ca/fitting_the_titleblock

[@johnnym1320]

if you take a propane torch and slightly burn the paint it will come off even easier

[@PithyBikes]

This a really good idea! TY!

[@sweenep86]

Try a 3M strip and clean disc, way more efficient at stripping than a wire brush cup

[@PithyBikes]

+sweenep86 sounds good! I should start asking you guys this stuff before do it! 😂

[@snarfsnarfs]

I'm sure there's an obvious answer to this but I can see why the tubes are always drilled through at the points where they are welded? I had wondered if it was just to let the purge gas through but I see there are much larger holes in the HT of the donor bike. What is the purpose of them?

[@PithyBikes]

I think specifically on BMX bikes it's for weight savings, that's my guess anyway. I read the other day that for Brazed frames it's very important to have these holes because when the whole frame heats up it creates pressure inside the tubes and could cause the puddle to blow air out where the brazing is happening.

[@ajaykharwar1898]

Very nice idea i want to take this types idea

[@danielmoreira1003]

hello. use synthetic wheel abrasive. Is much faster and less dangerous than wire wheel. :)

[@PithyBikes]

+Daniel Moreira sounds good! I did get a lot of those little wires stuck in my t-shirt.

[@ridethroughlifertl]

Those are good paint removers. You can work on softer metals without fear of digging into them, too.

[@johndoes2434]

Do you Sell your work or make frames for other people and I haven't seen a long tail in a 29 in looking for A builder that can make me a frame for a 29 inch tire

[@iliaskarimi5751]

Hello thank you for the information please i wanna know the steps that you followed to learn , since i am studying mechanical engineer and i am interested design bikes

[@PithyBikes]

I might do a video on this subject because i get asked this on occasion. For now here's a summary - The first thing I did was take a short welding class. This I think is a great first step because it gives you a tactile feel for welding and you'll know right away if you think welding is something you want to continue learning. After that I took a few machining classes. Again, I think a tactile hands on approach is very helpful even if you plan to be in a 3d program most of the time. I think there's a lot of knowledge one gains just from the 'feel' of engineering you get from a hands on approach. After completing my welding and machining classes I was hooked and I knew I had to buy a welder, lathe and mill. From there the rest is pretty straight forward. Just start making stuff! :)

[@PithyBikes]

Well, I guess there's more to it than that especially with frame building. Do lots of google searches and go to the major frame building forums. I was looking at these two forums a lot. MTBR forum forums.mtbr.com/frame-building/ Bike forums www.bikeforums.net/framebuilders/ Next, and a more modern approach I suggest getting on Instagram and searching/following frame builders. Just search "Bicycle Frame Building"

[@cloudedmoon]

Do you use the Autocad pro version? Cause i want to print my design in the online version but can't seem to find a way to do that.

[@PithyBikes]

I don't use Autocad. I've used Fusion 360. And for the bicycle frame I'm using BikeCAD. www.bikecad.ca/

[@cloudedmoon]

Pithy Bikes my bad. I meant BikeCAD. Somehow i cant find a print or export button in the online free bikecad

[@riceburner32]

Great videos! get that grinder rest closer to the stone.

[@PithyBikes]

+Make It Fit absolutely! I did do that for the rest of the parts. Need to slow down more and inspect my equipment. 👍

[@riceburner32]

you might think about going to Harbor Freight and picking up the 12" disc sander item #43468. With a coupon and when it goes on sale you can get it for around a hundred bucks. You will be throwing rocks at the grinder.

[@JuriWissekerke]

hello.. what kind of tube you're using?

[@PithyBikes]

+Juri Egter van Wissekerke 4130 chromoly

[@Valuiskihh]

Very nice channel, subscription!

[@jorgefiggy710]

I can not believe you sacrificed the grime ghost😨😨😨😨😨

[@PithyBikes]

+jorge Figgy it was painful but the tube was the perfect size. You must be a fgfs rider because you recognize this frame. Wait, are you the dude to bought the SE from me?

[@jorgefiggy710]

+Pithy Bikes no I didn't buy the SE frame or bike but I always wanted a grime ghost I had goat but not a ghost and yes I used to ride fgfs matter of fact I'm buying a medium goat

[@microender1489]

Pithy Bikes Where do you get the tubes

[@PithyBikes]

For my first build I got tubes from henryjames.com . For this build I got them from Aircraft Spruce - aircraftspruce.com. More specialized components like drops, BB, and head tubes you can get from places in this list - forums.mtbr.com/frame-building/master-list-framebuilding-suppliers-595808.html

[@microender1489]

Pithy Bikes thanks 🚴🏽

[@justaregularbiker]

Nice video! :D

[@PithyBikes]

+Tony Garcia 🙌

[@wackedoutdude]

You would probably be better cutting with a 4.5inch angle grinder with a 1mm cutting disc they are awsome. Good vids by the way.

[@PithyBikes]

+wacked outdude i need to try that. I think Mike Flanigan was saying he uses one.

[@garyjames2703]

awesomesauce

[@PithyBikes]

+Gary James 👍

[@lightavi]

Hello Steve, It has nothing to do with this video but do you know the tubenotcher website of dogfeatherdesign.com/ttn_js/ ?? They have some nice options. It could maybe help sometimes. If you mentioned it before sorry then. regards Bart

[@michaelanderson8464]

take a lot of pictures if the bike lost it's one time bike

[@dinxsy8069]

Pushbike chopshop, watch the police don't come knocking ha ha.

[@PithyBikes]

+Dinxsy it's the neighbors I should worry about ;) but really, all my neighbor are chill.

[@dinxsy8069]

Pithy Bikes If they have kids i reckon they'll come knocking for ones to be built

[@pioneltapinessi947]

:D

[@PithyBikes]

:)

[@AndrewBryantPianoTuner]

So much faffing about, just build the bloody thing.