Surly Chromoly Torque Plate with Rear disc mount

[Lemlux]

As I was browsing Surly's web site I came across these "...heavy duty Instigator dropouts are investment cast /CroMoly and include International Standard disc mounts. They can be TIG-welded or fillet brazed."

http://surlybikes.com/parts/frame_building_parts/

I don't know how much weaker "investment cast CroMoly" is compared to stainless steel plate, but I sure like the potential to use a smaller diameter rear wheel on my 2004 Gary Fisher 229 frame with a disc brake. It appears that my dropout area has either two or three holes that can be drilled through and bolted to the Surly part as belt-and-suspenders support to a JB-Weld bonding.

What potential issues am I missing, if any?

 

[Hillhater]

They certainly wont be as strong or tough as rolled Cromo billet stock and will be much more prone to cracking ( cast grain structure).
also they dont look to be very thick ( 3-4 mm maybe ?) ...so not the ideal torque plate solution.
But a good find for disc conversion no the less. !

 

[Lemlux]

Unfortunately, the plate / mounts may be unobtanium at the moment. They don't show in the Surley store inder frame parts so I've emailed a question about if and when they will be available at what pricing.

 

[Lemlux]

Surly advised that, although they don't sell these adapters in their web store, some dealers do stock them. MSRP is $37.