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Wishbone tube thickness
goodguydrew - 15/11/07 at 10:29 PM

I intend to buy the tube for my front suspension tomorrow.
I plan to use:
19mm dia, 1.6mm wall thickness for the top tubes.
25mm dia, 1.6mm wall thickness for the
bottom tubes.
Does anyone have any advice on this?
Thanks folks.


ecosse - 15/11/07 at 10:35 PM

I used 19x2.5 on the top and 25x2 on the bottom if that helps any.
Presuming you are going for book style suspension it will be the bottom arm that takes the load, plenty advice about on the subject if you do a search though.

Cheers

Alex


goodguydrew - 15/11/07 at 10:43 PM

Yes, standard book front suspension.


ecosse - 15/11/07 at 11:00 PM

Are you buying the bottom wishbone plates or making them?
Do you have a tube notcher or are you doing it by hand?
There is a tube cutting program about (tubemitre I think?) to get the angles/fishmouths right, I should still have it somewhere if you need it?

Cheers
Alex


sgraber - 16/11/07 at 12:01 AM

winmiter.exe

http://home.tallships.ca/mspencer/winmiter.html


johnemms - 16/11/07 at 08:55 AM

My opinion is I'd rather the front wishbone - bent - twisted - sheared etc... on curbing it or glancing blow as opposed to ...

So strong it ripped my front chassis rail and body work either off or out of line...

Just my thoughts anyway....


Delinquent - 16/11/07 at 09:21 AM

book I've just read reckons that you shouldn't go below 20mm dia 3mm wall thickness for the main load bearing arm, so ecosse's 25 x 2 sounds good to me for the lower.


goodguydrew - 16/11/07 at 09:25 AM

Thanks for the advice.
I think I have a copy of the tube mitre program.