Van Nicholas Yukon 25" (very large)

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PhilDyson
Posts: 3
Joined: 12 Sep 2017, 3:32pm

Van Nicholas Yukon 25" (very large)

Postby PhilDyson » 14 Sep 2017, 3:36pm

63.5cm / 25" frame (centre to top)
Suit large rider, 6’3” and more (I'm 6'4").
Campag Veloce 10-speed (12-30) with Comp Triple (30/42/53)
Traditional square taper b/b
CX/R Pro Racing rim (36 spoke) on Mirage hub front, probably original, but runs smoothly
Open Pro (36 spoke) on Hope hub rear (approx. 1000 miles ridden)
Shimano dual pivot calliper brakes
Mudguards
I bought this bike second-hand, and have done about 8000 miles on it (mainly audax). In 2012 I had a crack on the LHS chainstay welded. Done by a specialist titanium (aerospace) welder. Not the prettiest weld, but effective!
Reason for sale – no longer riding audax, need space, don’t need three road-bikes!
Looking for £550 plus cost of carriage.

VN Yukon general view.jpg
weldline.jpg
weldline.jpg (13.69 KiB) Viewed 253 times
Last edited by PhilDyson on 25 Sep 2017, 5:07pm, edited 2 times in total.

dsmithave
Posts: 8
Joined: 11 Sep 2012, 8:52pm

Re: Van Nicholas Yukon 25" (very large)

Postby dsmithave » 22 Sep 2017, 12:52pm

pm sent

ScottSz
Posts: 3
Joined: 12 Apr 2017, 8:43am

Re: Van Nicholas Yukon 25" (very large)

Postby ScottSz » 24 Sep 2017, 7:25pm

This is the second welded titanium frame I've seen in my size and the second that had been welded in the past. Do you have any more photos, especially the welded area? C-c measurements for seat tube (I'm a bit taller than you)?

landsurfer
Posts: 2992
Joined: 27 Oct 2012, 9:13pm
Location: Rotherham

Re: Van Nicholas Yukon 25" (very large)

Postby landsurfer » 24 Sep 2017, 7:32pm

Seamed Ti "tubes" made from sheet ....
Brucey ... your thoughts .... mine are all negative when it comes to seamed " tubes" .. because they are not tubes, they are fabrications.
And if one seam has failed which one is next ?
The problem with common sense is that it's not that common .....
Highest gear, 80.74. Lowest gear, 28.44. 11-32, 9 speed Cassette. Single ring chainsets rule !

User avatar
meic
Posts: 17985
Joined: 1 Feb 2007, 9:37pm
Location: Caerfyrddin (Carmarthen)

Re: Van Nicholas Yukon 25" (very large)

Postby meic » 24 Sep 2017, 7:50pm

The seller probably didnt mean that it was a repair to a seam in the titanium tubing but if he did then he was probably mistaken.

From Van Nicholas's website.
We use two types of tubing to make our frames: cold-worked, drawn, seamless tubing and seamless hydroformed butted. Both types of tubing create extremely strong, lightweight frames, but the seamless hydroformed butted tubing is even lighter and more durable.
Yma o Hyd

landsurfer
Posts: 2992
Joined: 27 Oct 2012, 9:13pm
Location: Rotherham

Re: Van Nicholas Yukon 25" (very large)

Postby landsurfer » 24 Sep 2017, 7:58pm

The photo shows a longitudinal repair that would be expected with a seam failure ....thats the only reason i enquired .
If my Steel frame cracked in a similar manner it would be in the skip. Not for sale.
The problem with common sense is that it's not that common .....
Highest gear, 80.74. Lowest gear, 28.44. 11-32, 9 speed Cassette. Single ring chainsets rule !

PhilDyson
Posts: 3
Joined: 12 Sep 2017, 3:32pm

Re: Van Nicholas Yukon 25" (very large)

Postby PhilDyson » 25 Sep 2017, 3:58pm

meic wrote:The seller probably didnt mean that it was a repair to a seam in the titanium tubing but if he did then he was probably mistaken.



I'm neither a metallurgist nor a bike builder. It was a straight "crack" longitudinally on the tube. It looked like a seam. Did VN use seamed tubes in 2007? I have no idea.

Edited to add - just replaced the photo of the weld, and from a better angle I observe it's not as straight as I remembered! So not a seam.
Last edited by PhilDyson on 25 Sep 2017, 5:09pm, edited 1 time in total.

PhilDyson
Posts: 3
Joined: 12 Sep 2017, 3:32pm

Re: Van Nicholas Yukon 25" (very large)

Postby PhilDyson » 25 Sep 2017, 4:05pm

ScottSz wrote:This is the second welded titanium frame I've seen in my size and the second that had been welded in the past. Do you have any more photos, especially the welded area? C-c measurements for seat tube (I'm a bit taller than you)?

I'ts a difficult spot to get a photo of, but I've just got a better shot which I'll upload in a few minutes, when I've adjusted the pixel count. The seat tube is 60.5cm c/c


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