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Surly Midnight Special Build

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Surly Midnight Special Build

Old 06-09-21, 04:40 AM
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Champ340
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Surly Midnight Special Build

Hi there I just picked up a 2017 Surly Midnight Special Frame. I would like to set it up for road biking and light gravel. I have a mountain bike that I would like to use as many components as possible to save cost.

Mountain bike has 9 speed Shimano Deore FD and Shimano Acera RD. Shimano Alivio Cranks and a 10/32 Cassette. Scott 940 Mountain bike.

To convert it to drop bar my understanding is that any Shimano 10speed shifters will work, excluding new Tiagra. Is this correct?

Mountain bike wheels are 29". Will these work? Alexrims XC49 ETRTO 622.

Many thanks for your help.
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Old 06-09-21, 04:51 AM
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shelbyfv 
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Originally Posted by Champ340 View Post
Hi there I just picked up a 2017 Surly Midnight Special Frame. I would like to set it up for road biking and light gravel. I have a mountain bike that I would like to use as many components as possible to save cost.

Mountain bike has 9 speed Shimano Deore FD and Shimano Acera RD. Shimano Alivio Cranks and a 10/32 Cassette. Scott 940 Mountain bike.

To convert it to drop bar my understanding is that any Shimano 10speed shifters will work, excluding new Tiagra. Is this correct?

Mountain bike wheels are 29". Will these work? Alexrims XC49 ETRTO 622.

Many thanks for your help.
You may be able to use your RD on the new build. Cassette and shifter speeds need to match. You will have to eyeball your wheels. Spacing and attachment (QR/TA) need to match.
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Old 06-09-21, 07:32 AM
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HillRider
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Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

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29" MTB wheels will work but the hubs' thru-axle diameters must match the frame and fork. The Midnight Special comes with 12x100 front and 12x142 rear thru-axles while many MTB front wheels use a 15 mm thru-axle.

I installed Shimano WH-RX570 700c wheels (ISO/ ETRTO 622, aka 29") on my Midnight Special and they have worked well.

As noted your shifters and cassette speeds must match but your 9-speed rear derailleur will work with any 10-speed and below road shifter. If you use 10-speed shifters you will need a 10-speed cassette and chain.

Also note the MS has a 1-1/8" straight steerer but uses 44mm press-in headset cups, not the more common 34 mm press-in cups that many 1-1/8" headsets use. I installed a Cane Creek 40-series headset on mine with a ZS44/28.6 upper and a EC44/30 lower cups.

Enjoy the bike. I really like mine.
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