something a bit different

[loopybike]

ok, I'm new to this forum, but I'd like some feedback

A while ago I had an idea for a different method of making a bike frame. I am a TIG welder by trade, so the engineering wasn't a problem, just finding the time!

so here is a mock-up with wheels and saddle just placed on the frame. For the actual bike I am using Espresso wheels in silver and a Sturney Archer 2 speed, coaster brake rear hub.

I fully understand that this is in no way a performance bike, due to the weight. But it is built from 316 stainless steel, so when i get to polish it, it will SHINE and keep on shining!

Oh and I have a Brookes saddle and rosewood/beech handle bar to go on it.

 

[loopybike]

 

[loopybike]

getting there........

love to hear any thoughts / comments....

 

[classic33]

Nice & certain to get noticed.
However too many joints, over 70. Each joint is a potential failure point. I'd say theres very little lateral stability in the design though

 

[loopybike]

Resisting twisting is my main concern ( and weight ) so I have started welding in-fill pieces between the circles. You can see them in the front few rows. Luckily I have access to cnc sheet and tube lasers, otherwise this would take way too long! These pieces have made a massive difference to the strength, and I think it looks better, so I will continue with them for the whole bike.

Thanks for your comments.

 

[steveindenmark]

I really like this. How are you going to fit the rear wheel and brakes in?

Steve

 

[loopybike]

well, it's finished now

 

[Spinney]

Brilliant!
A pity you had to put the top tube and down tube on, rather than just relying on the circles - for strength, I guess?

How does it handle?

 

[loopybike]

and it rides REALLY smooth.

 

[loopybike]

yeah without the tubes was a bit "flexi" lol

 

[glasgowcyclist]

well, it's finished now

Looks fab!

And it'll be perfect for my next shopping trip to Majestic Wine.


GC

 

[Minotier]

Good idea, nice craftsmanship. Be interesting to see how your project copes with the roads and terrain.

 

[loopybike]

so far done about 200 miles on roads and gravel cycle paths. no issues other than the bottom bracket working loose and creaking after the first 5 miles. I splashed out £5 on the right tool to tighten it properly! Now it rides smoothly and very quietly. It weighs in at 16kg, and only has 2 gears, so uphills are fun!

 

[Pottsy]

Wow, brilliant!

 

[Minotier]

Excellent, the best thing by far though is that you had the idea and built it yourself.