Well cared for 2021 509 Necessary Evil V1 gravel bike.

Titanium at it's best, with beautifully machined dropouts and a custom wrap. It has a matching I9 Ultralight 235 wheelset (1455 grams!) and is ready for your next adventure.

- 55cm Frame

- Ultegra hydraulic 1x11 groupset with Wolftooth chainring

- Industry 9 Ultralight 235 wheelset

- Thomson stem and seatpost

- Brooks C15 Carved Saddle

- Salsa Carbon handlebar

- Teravail Cannonball 42c Tires

- Cane Creek Forty Headset

- Pedals Not Included

Description from 509 Cycles -

We are super happy to announce a new bike in the line up for us, The Necessary Evil. About two years of development and a few prototypes later, we got a bike that is fully capable from road racing to hitting single track and anything in between. Like our Jabit III frame, we wanted a bike that was extremely versatile and could be build up several different ways. We also like the option to have two set of wheels for this bike, like our fat bike. When doing long road rides it’s great to have a set of 700 wheels but when you want to get off the pavement and hit some gravel, fire roads or adventuring into the unknown a set of 650b wheels is very accommodating. The Necessary Evil can fit up to a 700x50c or 650×2.35 tire in the frame, this is due to the CNC machined yoke that we use. The center of the yoke is drilled out to save weight, but has plenty of material to keep the frame stiff and strong with a large welding surface.Available in either Double Butted Steel or 3/2.5 Titanium Butted Tubing.

Feautures:

44mm Headtube

142×12 Rear end spacing

BSA 68 English Tread BB

Flat mount disc brake (140 post mount).

Rack and Fender mounts w/ 3 bottle cages

27.2 mm Seatpost / 31.8mm clamp

Clearance for a 650 x 2.3″ or 700x50c Tires

Steel Frames are ED coated to prevent rust

Uses 32mm Flat mount bolts for frame

Accepts 1x or 2x drivetrains

Titanium Frame weight on 55cm = 4.1 lbs

Double Butted Steel Frame weight 55cm = 5.1 lbs