Raleigh MV9 sp by
jenkwang, on Flickr
Here are the details of what had to be done to mount the Tyrell AM9 wheels onto the bike.
Clearance wise, there is no obstruction for the 451 wheels to the frame/fork.
OLD
The OLD of the wheel is 130mm, but the Raleigh has a 135mm OLD.
So a spacer was needed to increase this.
Brake to Wheel Rim
Since the wheels are now a larger diameter, the brake pads can't reach the rim of the new wheels.
There is the option of longer V-brakes, but these are rather specialized and more expensive (w/o the option to try before I buy).
So I opted for brake extensions.
I wanted something that looked good, so my first purchase was these ones from LitePro.
Raleigh MV9 sp by
jenkwang, on Flickr
These fit on the mounts of frame/fork and look like a less "make do" implementation.
However, only the rear ones could be used as the steel fork for the stock bike had welded mounting posts.
So I had to buy another type of brake extensions, which to me looked more "make do".
Raleigh MV9 sp by
jenkwang, on Flickr
Again, these are from Litepro.
They seem to work fine and probably would be the safer bet for most bikes doing a 406>451 conversion.