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Surly ECR 29+


Sometimes the only way to break the humdrum of life is with a bike ride off the beaten path. Sometimes just for a quick overnighter, sometimes a month and half fully-loaded through nine countries. The ECR is our answer to those sometimes.


Get in touch to discuss sizing and availability.

Drop into the workshop, call us on (03) 9388 1319, send us an email to or fill out the form below and we’ll get back to you.


Those familiar with this steel mule know it’s designed around plus tires, previously of the 29″ variety. A fully loaded 29+ bike is an excellent way to explore and get away for a while… if you’re of a certain stature that is. For smaller riders, it poses several challenges though. And no one wants new problems when they’re in the woods trying to escape old ones. To solve this, we redesigned the smaller sizes of the ECR to work with 27.5+ while the larger sizes are still equipped with 29+. All you medium specimens out there get your pick of the litter as we’re offering that size in both options. So way to just be average I guess.

Other updates to the ECR include and are limited to: Gnot-Boost rear spacing with our updated Troll dropout and a killer new beige paint job. It retains the abundant accessory mounts that we all know and love like Surly Trip Guide for brakes and derailleurs, fender, rack, and Bill/Ted eyelets, and a Rohloff torque arm slot. The 27.5+ sizes also feature two sets of Three-Pack bosses while the 29+ sizes have two water bottle mounts and one set of Three-Pack bosses. You’ve got a lot of options to bring all your “necessities” with you and still have room for excess baggage if you’ve got it. And sweet ground scores when you find them.

Get loaded and go with the ECR!


Surly 4130 CroMoly steel. Custom double-butted trumpet tube main triangle. TIG-welded. ED coated

Rear Dropouts
Horizontal slotted with derailleur hanger; Surly “Gnot Boost” 135, 142, or 148mm hub spacing compatibility, Features Rohloff torque arm slot and threaded eyelets for fenders, racks and Surly trailer mounts

Brake Compatibility
51mm I.S. disc calipers (Max rotor size 160mm rear with Surly brake adapter, 203mm front)

XS–M (27.5+) has two triple bottle-mounts. M–XL (29+) has two water bottle mounts and one triple bottle-mount. Surly Trip Guide full line guides for brake and derailleurs, fender and rack eyelets

Seatpost diameter

Seatpost clamp diameter
30.0mm (Surly stainless included)

Headset/Steerer Tube
1-1/8″ threadless

Front Derailleur Clamp Diameter
28.6mm, High direct-mount standard, clamp adapter included

Bottom bracket shell
73mm shell width, threaded standard English (1.37″ x 24t)

Chainring Clearance
Triple 22/34/44t, Double 26/39t, Max single ring clearance, middle position, 34t. Outer position 44t. (Triple will only work with 2.5″ tires or smaller)

Tire Clearance
29+ is 29 x 3.0″ (with fenders);
27.5+ is 27.5 x 3.0″ (with fenders); Individual tire and rim combos affect tire clearance

TIG-welded custom-butted 4130 CroMoly, non-suspension corrected, 1-1/8″ steerer tube, 203mm disc brake clearance

Thru Axle
HU0134 Surly 12×142/148 Rear Thru Axle

Beige Pantsuit


Complete bike spec subject to change


Surly ECR, 100% Surly 4130 CroMoly steel. ED coated. Double-butted main triangle. TIG-welded

Surly ECR, TIG-welded custom-butted 4130 CroMoly, non-suspension corrected, 1-1/8″ steerer tube, 203mm disc brake clearance

Seatpost Clamp
Surly Stainless, 30.0mm (Surly stainless included)


Surly O.D. 26/39t

Bottom Bracket
Surly Enduro, black

Front Derailleur
Shimano SLX FD-M661, Problem Solvers direct mount adaptor (31.8mm w/shim)

Rear Derailleur
Shimano Deore RD-M615 SGS, 10-speed

Cog or Cassette
SunRace, 10 speed, 11-40t

KMC X10, Silver


Cane Creek, 40 series

Avid BB7, Centerline rotors. 180/160mm front & rear

Brake Levers
Avid FR-5, Black

Microshift SL-M10, 10-speed

HL Satori, 31.8, Black

Surly Moloko, Black

WTB Volt Sport, Steel Rail

Kalloy SP-342


Front hub
Surly Ultra New Disc, 32h. 6-bolt disc. Black

Rear hub
Salsa 148mm, 12mm thru-axle, 32h

Alex MD40

Surly Knard 29×3.0″, 33TPI

Frame SizeStem LengthStem AngleHandlebar WidthCrank Length


Seat Tube Length
Top Tube Length
Effective Top Tube Length
Head Tube Angle70.070.070.0
Seat Tube Angle72.572.572.5
BB Drop80.080.080.0
Chainstay Length451.0451.0451.0
Standover Height805.0840.0875.0
Head Tube Length100.0125.0150.0
Fork Length468.0468.0468.0
Fork Offset43.043.043.0

*1 Standover is measured from the top of the TT, at the center, with a tire measuring approximately Ø775mm
*2 St angle is the effective ST angle.


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