Bullwinkle the Surly ECR – a parts list.

I built my Surly ECR up with a mixture of parts I definitely wanted, and whatever second hand parts I could find to fill in the gaps (to get some quality outside my price range). I built the wheels myself, with new parts except for the second-hand Rohloff Speedhub. Otherwise, used parts dominate among the static parts such as the seatpost, stem, and handlebar. But, no part was chosen haphazardly (perhaps with the exception of the brake levers, which had occupied my parts bin for several years). The setback of the seatpost and sweep of the handlebar are as important as the shiny wheels to making me comfortable and happy on this bike.

So here are the details of the build list. Some bits are on order, and not actually physically present on the bike yet.

Wheel building

Frame: Surly ECR size L (20″)

Fork: Surly ECR

Seatpost clamp: Surly stainless

Crankset: Shimano XTR M970 172.5mm

Bottom Bracket: Race Face X-Type DH

Derailleurs: n/a

Chainring: Blackspire 34t (will be switched for Surly Stainless, 34t)

Cog: Rohloff 16t

Headset: Cane Creek 40

Brakes: Avid BB7

Brake Levers: Sram SL 9.0 (polymer, these came from the old parts bin and were meant to be temporary. But now I like them.)

Shifters: Rohloff twist

Stem: Thomson X2 100mm

Handlebar: FSA Gravity 777 flat bar (10 degree sweep, flat bar. 777m wide currently, to be shortened a tiny bit for touring)

Saddle: Specialized BG Avatar 143mm – worn out (Selle Anatomica Titanico X on order)

Grips: ODI Rogue lock-ons. These will probably get traded for some Ergons with bar ends.

Front Hub: Velocity ATB Lightweight 9mm (This is actually a rebranded Novatec hub, which is a good thing. The Taiwanese are the 21st century experts of all things bikes.)

Rear Hub: Rohloff Speedhub Disc (14 speed internal gear hub)

Rims: Velocity Dually 29″ (45mm wide)

Spokes: Sapim 14g (I usually prefer butted spokes, but I got talked out of it this time), brass nipples.

Tires: Surly Knard 27tpi, 29×3″

Rim Tape: Gorilla tape, cut to width, two layers for a better seal.

Tubes: None. Stans sealant instead.

Dually rim tape

I used thin strips of Gorilla tape to build up a bead hook. Forty-five millimeter strips of Gorilla tape were then used to go over all of this. I was able to get a seal with only one layer (above these bead hook strips), but still leaked sealant out of the bead as I tried to bring the pressure down to about 17 PSI. Two layers should work better. One condition of tubeless for me is that I must be able to install the tire using only a floor pump, since I cannot count on there always being a compressor around.

More pictures will have to be added later, as I’m away from the bike for a while.

The ECR on the Hyland Pass Trail in the Babine Mountains in October.

5 thoughts on “Bullwinkle the Surly ECR – a parts list.

  1. Pingback: More on the Surly ECR | Trails and Tours - Bikepacking

  2. Still running tubeless with the Duallys? I attempted a tubeless set-up on Rabbit Holes tonight, and had my first ‘tubeless horror story” situation. For now, I have adjusted it so that the system is holding air, but I do not trust it at low pressures (lots of low-pressure winter riding these days), or under high loads. The tire bead refused to seal, as sealant was spewing from the tire/rim junction. Finally, the sealant is holding, but all of my previous tubeless experiences tell me this is not the long-term solution. I have not ridden it yet.

    • I also had sealant leaking out of the bead, and a slow leak at the bead at lower pressures until I added a second layer of tape. That is, those thin strips of gorilla tape to build a bead lock, plus two layers of gorilla tape across the full width. I managed to get the bead to seat with a floor pump still, but just barely. Almost no sealant found its way out at the bead with the second layer of tape.

      It’s still too early to say if this will be reliable at lower air pressures, as I just added the second layer to the front this morning. But, I’m quite optimistic.

      • Thanks, I resorted to the faithful “split-tube method” today, with great satisfaction. I support tubeless systems, and this method has never failed me. At low wintertime pressures, I do not want to risk losing air, as handling a frame pump at 0F is a real pain.

        I am happily rolling on a fresh Rabbit Hole/X7 wheel, with a filleted 26″ presta tube, and a reflective rimstrip showing from inside the wheel. Thanks for the advice. I look forward to the (potential) upcoming Stan’s 52mm rim.

        Still enjoying the ECR?


      • Yes, still loving it. Today I rode about 12 miles through the 6″ of fresh snow in NYC, carrying most of a touring load. I let out a fair bit of air, and the tubeless set-up held fine. I still don’t quite trust it 100%, but riding it loaded in snow inspired some confidence.

        Central Park was beautiful. My toes froze. The 3″ tires had zero success at breaking fresh trails. Packed snow was a breeze.

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