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New fork maybe.

 
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mattsccm



Joined: 16 Apr 2012
Posts: 70

PostPosted: Mon May 22, 2017 8:47 pm    Post subject: New fork maybe.  Reply with quote

Just humour me. To fit a modern disc braked fork I would need to replace a 1" steering tube with a 1 1/8th.  Assume that as not a problem. Of course the fork will have a different trail etc to the original. I am considering playing with the head angle to allow for this. Just how many complications have I missed? The brazing isn't a worry nor is acquiring a suitable tube.
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Tango



Joined: 10 Oct 2015
Posts: 234
Location: Glossop, Derbyshire

PostPosted: Mon May 22, 2017 9:08 pm    Post subject: Reply with quote

I would imagine a disc brake front wheel wouldn't be as rigid as a normal wheel as the spoke flanges are closer together to allow for the disc. A trike front wheel needs to be very rigid laterally to cope with sideways cornering forces, whereas a bike leans on cornering and the sideways forces are much less
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geoff booker



Joined: 23 Mar 2012
Posts: 603
Location: Oxford

PostPosted: Tue May 23, 2017 7:24 am    Post subject: Reply with quote

Disc brake wheel would be fine for a trike. The hub is narrower with the left flange nearer to the centre, but I have built a tandem trike and a couple of single trikes with them and had no problems
I doubt you will be able to compensate for the lack of rake by altering the head angle. It would need to be a steeper angle which would bring the wheel too close to the pedals. the shorter rake of the fork will do that as well so a double whammy. I supose you could fit 100mm cranks!
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Trykit you'll like it!
Mr Trykit
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BarEndFan



Joined: 17 Nov 2013
Posts: 408
Location: The North West

PostPosted: Tue May 23, 2017 9:55 am    Post subject: Reply with quote

If brazing is not an issue wouldn't it be easier to have a one inch fork made with a disc mount and appropriate rake to match the frame rather than matching the frame to a fork? I know Ceeway are offering disc specif fork blades.
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Spenb



Joined: 01 Sep 2014
Posts: 24
Location: Scottish Borders

PostPosted: Tue May 23, 2017 10:01 am    Post subject: Reply with quote

We have a fork specially made from Mr Booker (Trykit) for the tandem when we were having difficultly turning because of the changed rake. We had a 1" A-Head made up with disk brake mounts, mudguard eyes, front and rear canti bosses.

Superb! workmanship second to non. Also fixed the issues we had - spot on.
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Not so MILD
Defiantly not LEAN
But always fairly TWISTED
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mattsccm



Joined: 16 Apr 2012
Posts: 70

PostPosted: Tue May 23, 2017 4:49 pm    Post subject: Reply with quote

Hmmm
Scrub that idea then. I am assuming that, should I find such a thing, a bike fork would be all wrong.
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geoff booker



Joined: 23 Mar 2012
Posts: 603
Location: Oxford

PostPosted: Tue May 23, 2017 6:24 pm    Post subject: Reply with quote

What is the head angle?


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