DIY forks update 2.

[jez-4-bikes-max]

You are going to die.
















I really wouldnt ride that setup in anger...

 

[ferrus]

I have to agree with what others have said. The pinning method is really not a good idea and will guarantee a fracture even if everything else holds up.
Please don't use these at all, not even on the road.

 

[Sithlord]

Please for your own safety and to save the medics a job.... DONT USE THEM,,,


If you really cant afford a pair of safe, untampered, not home made forks.. then give me a shout, I might be able to offer you something for the price of postage..

But Dont use them fella...

 

[Tad]

The boding on the drop outs really doesn't look too healthy.

My advice would be to leave the bike not locked up in a prominent location. Then wait round the corner watching your bike. Wait for some herbert to pinch your bike, let them have the first test ride. Be prepared to chase after them if the forks work ok or just stroll over, pick your bike up and kick the bike thief in the nuts as you carry your broken bike home.

 

[perry]

What a bunch of big girls , they will be fine .

 

[dyna-ti]

What a bunch of big girls , they will be fine .

Do you seriously consider these to be safe?

If so why dont you replace talk with some action and test them out for the guy

 

[perry]

Yes I whole heartedly do , I'd happily send them over a set of doubles no worry .

The rc31s however were a pile of flexy shite and I'm glad I sold them before they snapped .

 

[marc two tone]

diy forks

yes indeed...its a tough/scary act to follow an already established design and
one that is so crucial to your bikes' function!
any testing will be slow and controlled i can reassure you all of that,ive got tange items for the real thing(not made by me you will be glad to hear).
really though,is this so bad of a design? it works on human bones for starters.think of the pounding a runners femur will go through after
a broken leg has healed and they are back at it.also bear in mind
that the fork leg doesnt 'float' inside dropout,it is seated to the stop-end base.the pin is purely to keep it there,tight.
the resin then binds it all together-scruffy i know,its the inside that counts for now,aesthetically speaking thats coming later.
i could buy thirty pair or pace forks but,i want a challenge plus,to use up some otherwise redundant bits.i hate waste.
im still happy to step out of my comfort zone,for now.
look at your own stuff,do you totally trust them based on brand reputation
or settle on the knowledge that you still have the receipt and could sew
the mothers' if it breaks?
anyhow thanks for your input,even the dark humour!
its just for fun/research.i mean,dont you guys get p'd off when you cant get exactly what you need and,at the right price?

thanks alot.

 

[JeRkY]

I fully admire the creative spirit, dont get me wrong. However the design and more importantly the design combined with the materials are dangerous.

For information I am a Design & development engineer with some years experience working in orthopaedic implant design. And sorry but your comparison to this method working in bone doesn't quite line up. Bone with stainless pin in it will react very differently to a extruded aluminium section with a steel pin through it. Not sure if you were trying to compare epoxy resin to bone cement aswell, but I can assure you the fixation between a sintered titanium surface and freshly cut bone is far more interactive than the use of a tube of araldite on two comparitively smooth machined surfaces. The human body is far more amazing in its abilities than anything one could knock up in a workshop.

Sure manufactured product will break from time to time, but the amount of engineering knowledge that goes into them, the amount of virtual and physical simulation testing that happens on modern product and the days of risk analysis that get carried out throughout the design process all serve to reduce the risk of causing death or serious injury to any one purchasing a product.

They may not catastrophically fail leading to death by face planting, however they may, even on road use. I would certainly expect the fork to have taken potentially dangerous damage by the end of the great yorkshire bike ride.

By all means build your own forks, build your own bike frame, build your own jet aircraft, it is all possible, just do a bit of reading into the engineering processes that are best suited to the job first.

I am not trying to stem your enthusiasm or creative side, but I am concerned for a fellow forum member.

 

[marc two tone]

DIY forks

thanks,i mean really thanks!!
ive stirred enough passion to help me improve things greatly from
current state of constuction.
chinese proverp-many hands make light work.
english proverb-many cyclist knowledge make lightweight forks!

btw..ever fixed any cycling injuries?

marc.