The 12mm slotted MDS dropout is the newest chip for Surly`s MDS equipped trail frames.
The 12mm slotted dropout chip uses a standard derailleur mount for maximum compatibility and is made of cast and machined 6061-T6 aluminum, with a fender eyelet.
What’s the coolest part about the 12mm slotted MDS chip, you ask? The fact that it also has the capability to run a 12 x 142mm thru-axle in a single speed configuration. This is good news because single speeds are good news.
The MDS is featured on most of Surly`s trail bikes. That’s right; Krampus Ops, Karate Monkey Ops, Instigator 2.0 and Ice Cream Truck frames all sport these puppies.
SPECIFICATIONS- 12mm horizontal dropout
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Standard derailleur hanger
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Fender eyelets