SKU: 59751999952

Surly MDS Vertical Dropouts

Sale price$47.64 Regular price$52.93
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Ships within 48 hours · Estimated delivery Aug 24 - Aug 29

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Description

Surly MDS Vertical DropoutsSURLY MDS VERTICAL DROPOUTS MDS Dropout Chips The 12mm slotted MDS dropout is the newest chip for our MDS equipped trail frames. You like chips, dont you? The 12mm slotted dropout chip uses a standard derailleur mount for maximum compatibility and is made of cast and machined 6061 T6 aluminum. Whats 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

SURLY MDS VERTICAL DROPOUTS 

MDS Dropout Chips

The 12mm slotted MDS dropout is the newest chip for our MDS equipped trail frames. You like chips, don’t you? The 12mm slotted dropout chip uses a standard derailleur mount for maximum compatibility and is made of cast and machined 6061-T6 aluminum. 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.

When you get an MDS equipped frame you’re getting the option to set it up however you want. You can run a 142 x 12mm thru-axle rear end with a direct mount Shimano hanger, standard 135mm QR or The Mighty Singlespeed. The way this will work is that our complete bikes that feature the MDS will ship with whatever chip is compatible with derailleur spec. For instance, the complete Instigator 2.0 ships with the 142 x 12mm thru-axle Shimano chip. If you want to change it to a singlespeed later (and why wouldn’t you?), all you have to do is get the SS chip. Frames will ship with all three MDS chips so pick your poison. The 142 x 12mm and 135mm QR chips are made of cast and machined 6061-T6 aluminum and The Mighty Singlespeed chip is 304 stainless steel, because the two words ‘aluminum’ and ‘singlespeed’ should never be too close to each other. Bad shit can happen…. As you can, the MDS gives you not just different build options, it lets you use a more varied selection of parts for your frame up builds. The MDS is featured on most of our trail bikes. That’s right; Krampus Ops, Karate Monkey Ops, Instigator 2.0 and Ice Cream Truck frames all sport these puppies.

 

Surly MDS Dropout Instructions

 

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 59751999952

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SirchainsawCharlie
Boise, US
★★★★★ 5
Fits 2007 Honda crv.
It fits my 2007 Honda crv and sealed very well.
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Reviewed in the United States on April 15, 2026
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Kelsey
Boise, US
★★★★★ 5
Fits 2007 Honda CRV
Fits 2007 Honda CRV.
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Reviewed in the United States on June 3, 2025
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R + K Z
Waukegan, US
★★★★★ 3
Filters well but causes air flow restrictions
Very thick and does filter well however it is so thick it actually blocks quite a bit of air flow
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Reviewed in the United States on October 27, 2020
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Heather gomez
Waukegan, US
★★★★★ 5
Did not disappoint!
Perfect Fit: Bolted right up to the engine block without any shimmying or modification needed. ​Strong Crank: The motor sounds powerful and turns the engine over significantly faster than my old, dying unit. Once hooked up, the car fired up instantly on the first turn of the key. No grinding, no clicking, just a smooth, high-torque start. Price: A lot more cheaper then your average auto parts stores. ​Build Quality: The solenoid connections are solid and the threads were clean. Packaging: The box arrived on time but a bit beat up, but the starter itself was well-protected in bubble wrap and undamaged.
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Reviewed in the United States on April 2, 2026
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David
Chelsea, US
★★★★★ 5
Still working great!!
I really didn't have a good feeling about ordering a starter online, but I was in a situation where I didn't have the time to get to the auto shop before my day off and Amazon could get me this part just in time. So I reluctantly gave it a shot. When it showed up it had a couple of small black pieces of plastic loose in the box similar to the pieces shown in another review on here. It didn't look like they from anything functional. I really needed to get my wife's car running so decided to install it anyways. The install was easy and it was a perfect fit. The only draw back would be that the signal wire didn't click in place like the signal wire on the original starter. But it was a snug fit. It has been installed and working great for a month now. Very happy with my purchase. It also had a message from the seller when I opened the box giving the starter a 2 year warranty. Very cool. If the starters fails in the next two years I'll get on here and edit my review. So if your reading this then it is still working great.
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Reviewed in the United States on December 10, 2025

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